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Georgia CDL Tanker Test study materials
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Georgia CDL Tanker Test practice questions

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Question 1Tanker vehicle inspection and pre-trip checks

During a pre-trip inspection of a tank vehicle, what is the primary purpose of checking the internal vapor recovery valve and its plumbing?

  1. To confirm the cargo tank can be pressurized for unloading
  2. To measure the liquid level inside the tank before departure
  3. To ensure the tank's emergency shutoff closes automatically when the engine stalls
  4. To verify that vapors displaced during loading are routed properly and do not escape to the atmosphere Correct answer.

Explanation

Vapor recovery plumbing carries displaced vapors back to the loading facility so they do not vent to the air. A pre-trip check confirms the valve, hoses, and fittings are intact and properly connected. Liquid-level measurement and pressurization are separate functions handled by other equipment.

Question 2Tanker vehicle inspection and pre-trip checks

Before loading a cargo tank, you must confirm the required outage (ullage). What does outage refer to?

  1. The pressure rating stamped on the tank shell
  2. The empty space left in the tank to allow for liquid expansion Correct answer.
  3. The amount of product lost through the vents
  4. The time the tank sits idle after unloading

Explanation

Outage is the empty space above the liquid that allows the product to expand as temperature rises without overflowing. Each product and tank has a specified outage that must be maintained. Failing to leave enough outage can cause liquid to escape through vents or relief devices.

Question 3Tanker vehicle inspection and pre-trip checks

When inspecting the emergency shutoff valves on a cargo tank before a trip, you should verify that they:

  1. Are wired open so loading is faster
  2. Are locked in the closed position during transport
  3. Close automatically and can be closed manually from a remote location Correct answer.
  4. Only operate when the parking brake is set

Explanation

Emergency shutoff valves must be able to stop the flow of product quickly, both by automatic action and by a remote manual control. The pre-trip check confirms they function and are not blocked open. They must remain open during normal transport so product can flow when needed.

Question 4Tanker vehicle inspection and pre-trip checks

You are checking the tires and wheels on a tanker before departure. Which condition requires the vehicle to be placed out of service?

  1. A small amount of dust on the sidewall
  2. A tread depth of 5/32 inch on a front tire
  3. A missing lug nut on a rear dual wheel Correct answer.
  4. A valve stem cap that is slightly loose

Explanation

Missing lug nuts or fasteners on a wheel are a critical defect that can lead to wheel loss and must be corrected before driving. Tread depth of 5/32 inch on a front tire meets the minimum requirement. Loose caps and dust are minor items that do not create an out-of-service condition.

Question 5Tanker vehicle inspection and pre-trip checks

What is the purpose of the baffles inside a tank used to haul liquid cargo?

  1. To increase the tank's carrying capacity
  2. To reduce the forward and backward surge of liquid during driving Correct answer.
  3. To filter impurities out of the product
  4. To divide the tank into separate product compartments

Explanation

Baffles are internal partitions with openings that slow the movement of liquid, reducing the surge that can upset vehicle handling and braking. They do not increase capacity or filter the product. Compartments for separate products are created by bulkheads, not baffles.

Question 6Tanker vehicle inspection and pre-trip checks

During your walk-around inspection, you notice the cargo tank's discharge hose is cracked and frayed near the coupling. What is the correct action?

  1. Wrap the damaged area with tape and continue the trip
  2. Ignore it because discharge hoses are not part of the pre-trip inspection
  3. Use the hose only for short trips until it can be replaced
  4. Tag the hose as defective and replace or repair it before hauling product Correct answer.

Explanation

A cracked or frayed discharge hose can fail under pressure and release hazardous product, so it must be removed from service. The defect should be tagged and the hose repaired or replaced before the vehicle is used. Hoses are a required part of the tanker pre-trip inspection.

Question 7Tanker vehicle inspection and pre-trip checks

Which document must be on the vehicle and available during a pre-trip check when hauling a hazardous material in a cargo tank?

  1. Shipping papers identifying the hazardous material Correct answer.
  2. A copy of the driver's personal insurance
  3. A bill of lading only
  4. The previous trip's fuel receipt

Explanation

Shipping papers describing the hazardous material must accompany the shipment and be within reach of the driver. They identify the product, hazard class, and emergency response information. Fuel receipts and personal insurance are not required shipping documents.

Question 8Tanker vehicle inspection and pre-trip checks

When checking the lighting system on a tanker during the pre-trip inspection, which lights must function properly?

  1. Headlights, brake lights, turn signals, and all required clearance and marker lights Correct answer.
  2. Only the headlights and brake lights
  3. Only the lights that are visible from the driver's seat
  4. Only the clearance lights on the tractor

Explanation

All required lighting, including headlights, brake lights, turn signals, and clearance and marker lights, must work before departure. Tankers are long and wide, so clearance and marker lights help other drivers see the vehicle. Checking only a subset leaves the vehicle noncompliant.

Question 9Tanker vehicle inspection and pre-trip checks

You are preparing to load a cargo tank and must verify the tank's maximum working pressure. Where should you confirm this information?

  1. From memory of similar tanks you have hauled
  2. On the tank's specification (data) plate Correct answer.
  3. By reading the tire sidewall ratings
  4. On the shipping paper only

Explanation

The specification plate mounted on the tank lists its design and working pressure, capacity, and other limits. You must confirm the load and unloading method stay within those limits. Shipping papers describe the product but not the tank's pressure rating, and tire ratings are unrelated.

Question 10Tanker vehicle inspection and pre-trip checks

During the pre-trip inspection, you check the tank's relief valve. Which statement correctly describes what you should confirm?

  1. The valve is plugged or capped to prevent vapor loss
  2. The valve is painted over to prevent corrosion
  3. The valve is unobstructed, undamaged, and free to vent as designed Correct answer.
  4. The valve is removed so the tank can be filled faster

Explanation

Relief valves protect the tank from overpressure and must be clean, undamaged, and able to open. Nothing should block or cap them, since blockage can cause the tank to rupture. Painting over or removing a relief valve defeats its safety function.

Question 11Tanker vehicle inspection and pre-trip checks

A tanker driver is inspecting the fifth wheel and coupling before a trip. Which observation indicates a problem that must be corrected?

  1. The release arm is secured with a safety latch
  2. The kingpin is not fully seated and the locking jaws are partially open Correct answer.
  3. The locking jaws are closed around the kingpin with no visible gap
  4. The fifth wheel is lightly greased on the contact surface

Explanation

The locking jaws must fully close around the kingpin so the trailer cannot separate from the tractor. A partially open jaw or unseated kingpin is a serious coupling defect that must be fixed before driving. Proper lubrication and a secured release arm are normal, acceptable conditions.

Question 12Tanker vehicle inspection and pre-trip checks

When inspecting the brake system on a tanker before departure, you perform a leak test. What are you checking for?

  1. That air pressure holds steady with brakes applied and does not drop beyond the allowed limit Correct answer.
  2. That the brake pedal travels all the way to the floor
  3. That the brake drums are cool to the touch
  4. That the parking brake releases automatically

Explanation

A leak test confirms the air brake system holds pressure when the brakes are applied, with only a small allowable loss. Excessive pressure loss means the brakes may not perform in an emergency. Pedal travel to the floor and automatic parking brake release are not the goals of the test.

Question 13Tanker vehicle inspection and pre-trip checks

Before hauling a liquid cargo, you must know the tank's compartment arrangement. Why is this important for the pre-trip check?

  1. It tells you which fuel grade the tractor uses
  2. It determines how the load must be distributed and which valves serve each compartment Correct answer.
  3. It sets the maximum highway speed for the trip
  4. It replaces the need to check the outage

Explanation

Knowing the compartments and their valves lets you load, balance, and unload the product correctly and avoid overloading one section. Proper distribution affects stability and axle weights. Speed limits and fuel type are unrelated, and outage must still be checked.

Question 14Tanker vehicle inspection and pre-trip checks

During a pre-trip inspection you find the cargo tank's grounding (static) cable is missing. Why must this be corrected before loading flammable product?

  1. It measures the liquid level in each compartment
  2. It provides a path to dissipate static electricity that could ignite vapors Correct answer.
  3. It keeps the tank cool during hot weather
  4. It is required to keep the tank pressurized

Explanation

A grounding cable bleeds off static electricity that builds up during loading and unloading, reducing the risk of igniting flammable vapors. Missing or damaged grounding equipment must be repaired before handling flammables. It does not cool the tank or measure liquid level.

Question 15Tanker vehicle inspection and pre-trip checks

You are inspecting the rear of a cargo tank and notice the underride guard is bent and does not extend low enough. What is the correct response?

  1. Remove the guard entirely to avoid dragging
  2. Repair or replace the guard so it meets the required height and strength before driving Correct answer.
  3. Continue the trip because underride guards are optional on tankers
  4. Lower the guard by loosening the bolts without repair

Explanation

Rear impact guards protect other vehicles from sliding under the tank in a collision and must meet required height and strength standards. A bent or improperly positioned guard must be repaired or replaced before the vehicle is operated. Removing it or loosening bolts without repair leaves the vehicle noncompliant.

Question 16Tanker vehicle inspection and pre-trip checks

When checking the tank's manhole covers and gaskets during pre-trip inspection, which condition should stop you from departing?

  1. The cover is clean and free of product residue
  2. The gasket is cracked and the cover does not seal tightly Correct answer.
  3. The gasket is pliable and the cover seals evenly
  4. The hinges move freely when the cover is opened

Explanation

A cracked gasket or a cover that will not seal allows product or vapor to escape, which is a leak hazard and a violation. Pliable gaskets, clean covers, and free-moving hinges are signs of good condition. Any sealing defect must be corrected before the vehicle is loaded or driven.

Question 17Tanker vehicle inspection and pre-trip checks

A driver must verify the cargo tank's venting system before a trip. Which statement best describes the correct condition?

  1. Vents are removed to speed up loading
  2. All vents are capped tightly to prevent any vapor release
  3. Vents are taped shut during loading and left that way
  4. Vents are open, unobstructed, and functioning so pressure does not build up Correct answer.

Explanation

Vents allow the tank to breathe as liquid and vapor expand or contract, preventing dangerous pressure or vacuum. They must be open, clean, and working, never capped or taped shut. Removing vents or blocking them can lead to tank rupture or collapse.

Question 18Tanker vehicle inspection and pre-trip checks

During the pre-trip inspection, you check the fire extinguisher required for a tanker hauling flammable liquid. Which condition is acceptable?

  1. The extinguisher is stored loose in the sleeper berth
  2. The seal is broken and the pin is missing
  3. The gauge needle is in the red but the tank feels full
  4. The gauge shows it is fully charged and it is securely mounted within reach Correct answer.

Explanation

A required fire extinguisher must be fully charged, properly mounted, and accessible to the driver. A gauge in the red, a missing pin, or a broken seal means it may not work when needed. Storage must be secure so it does not become a projectile in a crash.

Question 19Tanker vehicle inspection and pre-trip checks

You are inspecting a cargo tank and find the specification plate is missing. What does this mean for the vehicle's readiness?

  1. The tank cannot be confirmed as meeting its design limits and must not be used until the plate is restored Correct answer.
  2. It is acceptable as long as the tank looks undamaged
  3. The plate is only needed for pressure tanks, not for liquid tanks
  4. The plate can be replaced by writing the capacity on the tank with a marker

Explanation

The specification plate documents the tank's design limits, capacity, and approved service. Without it, the driver cannot verify the tank is safe and legal for the intended load, so it must be restored before use. A handwritten note or visual inspection does not substitute for the plate.

Question 20Tanker vehicle inspection and pre-trip checks

Before driving a tanker with a partial load, you consider the effect of liquid surge. Which pre-trip practice best addresses this hazard?

  1. Confirm the tank has baffles or is otherwise designed for the load, and drive smoothly Correct answer.
  2. Drain the tank to the last drop before moving
  3. Fill the tank completely to eliminate all movement
  4. Remove the baffles to allow even distribution

Explanation

Partial loads in unbaffled or smooth-bore tanks create strong surge that can affect steering and braking. The pre-trip check confirms the tank's baffle configuration suits the load, and the driver then accelerates, turns, and stops smoothly. Removing baffles or overfilling are not solutions to surge.

Question 21Tanker vehicle inspection and pre-trip checks

During a pre-trip inspection, you find the cargo tank's internal valve (emergency valve) is stuck in the open position and will not close remotely. What is the correct action?

  1. Close it by hand at the tank and continue
  2. Proceed because the valve being open allows normal flow
  3. Place the vehicle out of service until the valve operates correctly Correct answer.
  4. Load only a small amount of product and drive

Explanation

An emergency valve that cannot be closed remotely cannot stop product flow in an emergency, so the vehicle must be placed out of service until repaired. Being stuck open is a defect, not normal operation. Manually closing it at the tank does not restore the required remote shutdown capability.

Question 22Tanker vehicle inspection and pre-trip checks

A driver notices the tank's overturn protection (rollover protection) on the top fittings is damaged and one fitting is exposed above the protection. Why is this a serious pre-trip finding?

  1. It makes the tank taller than legal height limits
  2. It prevents the vapor recovery system from working
  3. It removes protection that keeps fittings from being sheared off in a rollover, risking a spill Correct answer.
  4. It increases the tank's weight beyond axle limits

Explanation

Overturn protection shields top-mounted fittings so they are not broken off if the tank rolls over, which could release product. Damaged protection with an exposed fitting must be repaired before the vehicle is used. Height, vapor recovery, and axle weight are separate concerns.

Question 23Tanker vehicle inspection and pre-trip checks

You are checking the air brake system on a tanker and notice the low air pressure warning does not activate when pressure drops. Why must this be corrected before departure?

  1. It only affects the parking brake, which is rarely used
  2. It warns the driver of a pressure loss that could reduce braking ability Correct answer.
  3. It is required only on trailers, not tractors
  4. It controls the cargo tank's venting

Explanation

The low pressure warning alerts the driver before air pressure falls too low for effective braking, so a nonworking warning is a serious safety defect. It must be repaired before the vehicle is operated. It is unrelated to cargo venting and is required on the tractor as well.

Question 24Tanker vehicle inspection and pre-trip checks

During pre-trip inspection of a tanker carrying a corrosive liquid, you find a small seep at a flange gasket on the discharge piping. What is the correct interpretation and action?

  1. The seep will stop once the product warms up
  2. Tightening the flange by hand while loaded is sufficient
  3. A small seep is normal for corrosives and can be ignored until the next trip
  4. Any seep is a leak that must be repaired before loading or driving Correct answer.

Explanation

Any leak of a corrosive product, even a small seep, is a hazard to people, equipment, and the environment and must be repaired before the vehicle is used. Seeps do not resolve with temperature and hand-tightening a loaded flange is unsafe. The vehicle stays out of service until the leak is fixed.

Question 25Tanker vehicle inspection and pre-trip checks

A tanker has two compartments loaded with different products. During the pre-trip check, what must you confirm about the compartment valves and piping before driving?

  1. That all compartment valves are open so products mix freely
  2. That only one compartment is ever used regardless of load
  3. That the piping is disconnected from all compartments
  4. That each compartment's valves are set so products cannot cross-contaminate and the correct outlets are aligned Correct answer.

Explanation

When compartments carry different products, valve settings must prevent cross-contamination and route each product to its correct outlet. Opening all valves or disconnecting piping would defeat this control. The pre-trip check confirms the correct valve lineup for the load.

Question 26Tanker vehicle inspection and pre-trip checks

During the pre-trip inspection of a cargo tank, you check the tank's specification plate. Which location is correct for this plate?

  1. Attached to the tank shell or to a permanent part of the tank near the front Correct answer.
  2. Kept in the cab door pocket with the registration
  3. Fastened to the rear underride guard where it is easy to read
  4. Stored inside the cab with the shipping papers

Explanation

The specification plate must be permanently attached to the cargo tank shell or a permanent structural part of the tank, usually near the front where it can be read. It identifies the tank's design and must stay with the tank, not be carried loose in the cab.

Question 27Tanker vehicle inspection and pre-trip checks

Before moving a cargo tank, you must confirm the tank is properly secured to the vehicle. Which item do you inspect for this purpose?

  1. The air line glad hands
  2. The mud flaps behind the rear wheels
  3. The mounting bolts and the tank's attachment to the frame Correct answer.
  4. The stop, tail, and clearance lights

Explanation

The cargo tank is held to the truck frame by its mounting bolts and attachment points, so a pre-trip check must confirm they are tight and undamaged. Loose or missing mounting hardware can let the tank shift or separate from the chassis.

Question 28Tanker vehicle inspection and pre-trip checks

While walking around a tanker, you notice the piping beneath the tank is supported only by the hoses and fittings themselves. What is the correct action?

  1. Inspect the piping supports and repair or replace them before departure Correct answer.
  2. Continue the trip and watch the piping for vibration
  3. Remove the unsupported section before departure
  4. Tie the piping up with wire and depart

Explanation

Cargo tank piping must be supported so its weight and vibration are not carried by hoses, valves, or fittings. Unsupported piping can crack or break loose and release product, so the supports must be repaired before the vehicle is driven.

Question 29Tanker vehicle inspection and pre-trip checks

During the pre-trip inspection, you check the cargo tank's emergency shutoff valves. Which statement describes the required condition?

  1. They must be locked in the open position during transport
  2. They must be wired open so loading is faster
  3. They must operate freely and close fully when activated Correct answer.
  4. They may leak slightly as long as the leak is small

Explanation

Emergency shutoff valves must move freely and seat fully so they can stop product flow in an emergency. A valve that sticks or will not close completely is a defect that must be corrected before departure.

Question 30Tanker vehicle inspection and pre-trip checks

You are checking the tires and wheels on a tanker before a trip. Which finding requires correction before you drive?

  1. A wheel has a missing lug nut Correct answer.
  2. A valve stem cap is snug on each stem
  3. Tire pressure matches the placard value
  4. Tread depth is even across the tire

Explanation

Every lug nut must be present and tight because a missing nut reduces clamping force and can lead to wheel loss. Missing or loose fasteners are out-of-service defects that must be fixed before the trip.

Question 31Tanker vehicle inspection and pre-trip checks

Before departure, you check the cargo tank's pressure gauge and the tank's pressure. What should you confirm?

  1. The pressure is as high as the tank will hold
  2. The gauge reads zero at all times
  3. The pressure is within the tank's working limits for the product loaded Correct answer.
  4. The pressure reading is ignored if the tank is only partly full

Explanation

Tank pressure must stay within the working limits established for the tank and the product being hauled. A gauge that is broken or a reading outside limits means the tank is not ready to move.

Question 32Tanker vehicle inspection and pre-trip checks

You are inspecting the rear of a tanker and check the bumper (rear impact guard). Which condition means the vehicle should not be dispatched?

  1. The guard has reflective tape on it
  2. The guard is firmly attached and at the required height
  3. The guard is painted and free of rust
  4. The guard is cracked at a weld and loose Correct answer.

Explanation

A cracked or loose rear impact guard cannot protect following vehicles in a collision and is a defect. The guard must be solidly mounted at the proper height before the tanker is driven.

Question 33Tanker vehicle inspection and pre-trip checks

During the walk-around, you check the tank's dome covers and their gaskets. Which observation is acceptable for departure?

  1. The gasket is torn but the cover is clamped down
  2. The cover is seated and the gasket is intact with no seepage Correct answer.
  3. The cover is slightly ajar to relieve vapor
  4. The cover is held down by a strap instead of its latch

Explanation

Dome covers must be fully seated with sound gaskets so liquid and vapor cannot escape. A torn gasket, an unlatched cover, or a cover held by a strap is a defect that must be corrected before moving.

Question 34Tanker vehicle inspection and pre-trip checks

You are preparing to haul a flammable liquid and check the required fire extinguisher. Which condition is correct for departure?

  1. It is stored loose in a side box so it can be grabbed quickly
  2. It is mounted outside the cab where weather can reach it
  3. It shows low pressure but the gauge is only slightly in the red
  4. It is mounted in the cab, fully charged, and shows a valid inspection tag Correct answer.

Explanation

The fire extinguisher must be securely mounted, fully charged, and within its inspection date so it will work if needed. A loose, low-pressure, or weather-exposed extinguisher may fail in an emergency.

Question 35Tanker vehicle inspection and pre-trip checks

During your inspection you find the cargo tank's vent is plugged with debris. Why must this be corrected before the tanker moves?

  1. A plugged vent causes the tank to build pressure or vacuum that can damage it Correct answer.
  2. A plugged vent makes the brake system slow to release
  3. A plugged vent only affects the tank's paint finish
  4. A plugged vent prevents the engine from starting

Explanation

The vent lets air in and out as the product loads, unloads, and changes temperature. If it is blocked, pressure or vacuum can build and damage the tank or force product out through other openings.

Question 36Tanker vehicle inspection and pre-trip checks

You are inspecting a tanker that will carry a corrosive product. You find a small drip at a valve packing gland. What should you do?

  1. Cover the drip with a drip pan and depart
  2. Wipe it dry and check again at the next stop
  3. Tighten the packing slightly and continue
  4. Have the leak corrected and the area checked before departure Correct answer.

Explanation

Even a small leak of a corrosive product is a defect that must be corrected before the tanker is driven. Leaks can worsen, damage equipment, and create a hazard on the road, so the source must be repaired first.

Question 37Tanker vehicle inspection and pre-trip checks

Before loading, you check the cargo tank's grounding cable and its clamp. Which condition is correct?

  1. The cable is coiled in the cab for safekeeping
  2. The clamp is painted over to prevent corrosion
  3. The cable is intact and the clamp makes a clean metal connection Correct answer.
  4. The cable is cut short but still attached at one end

Explanation

The grounding cable and clamp must be intact and able to make bare metal contact so static can drain safely during loading. A cut, missing, or painted clamp cannot provide a reliable ground.

Question 38Tanker vehicle inspection and pre-trip checks

You are checking the air brake system on a tanker. When you apply the brakes and hold them, the air pressure drops and you hear a steady hiss. What does this indicate?

  1. Normal operation of the compressor
  2. The parking brake is set correctly
  3. An air leak that must be repaired before departure Correct answer.
  4. The low pressure warning is working

Explanation

A steady hiss with a pressure drop while the brakes are applied points to an air leak in the system. Leaks can reduce braking power, so they must be found and repaired before the tanker is driven.

Question 39Tanker vehicle inspection and pre-trip checks

You are inspecting a cargo tank loaded with a product that must stay hot. Which item should you check during the pre-trip?

  1. The tank's insulation and any heater or temperature controls Correct answer.
  2. The color of the placards on the rear
  3. The position of the sun visor
  4. The tread depth on the steer tires

Explanation

For a temperature-sensitive product, the tank's insulation and heating or temperature-control system must be checked so the cargo stays within its required range. Placards, tires, and visors are separate checks unrelated to cargo temperature.

Question 40Tanker vehicle inspection and pre-trip checks

During a pre-trip inspection you find the cargo tank's overturn protection is bent and a fitting on top is exposed. Why is this a problem?

  1. It makes the tank lighter than its specification plate allows
  2. It prevents the dome cover from being opened for loading
  3. It removes protection that keeps a rollover from breaking the fitting and releasing product Correct answer.
  4. It changes the tank's venting pressure rating

Explanation

Overturn protection is designed to shield top fittings so a rollover does not shear them off and release cargo. Bent or missing protection leaves the fitting exposed and must be repaired before the tanker is used.

Question 41Tanker vehicle inspection and pre-trip checks

You are checking the cargo tank's discharge hose before a trip. Which condition means the hose must be taken out of service?

  1. The hose is marked with its pressure rating
  2. The hose is stored on its rack without kinks
  3. The hose has a soft bulge and a worn spot showing reinforcement Correct answer.
  4. The hose has a clean exterior and the couplings are tight

Explanation

A bulge or a worn spot that exposes reinforcement means the hose's strength is compromised and it could burst under pressure. Such a hose must be replaced before the tanker is used.

Question 42Tanker vehicle inspection and pre-trip checks

Before departure, you must confirm the cargo tank's internal valves will close if the remote control is released. What is the purpose of this check?

  1. To test whether the dome cover gasket seals
  2. To make sure the tank can be loaded faster
  3. To verify the tank's pressure gauge is accurate
  4. To confirm the valves will stop product flow if the driver loses control of the remote Correct answer.

Explanation

Internal valves are designed to close when their remote control is released, stopping product flow in an emergency. Testing this function during the pre-trip confirms the safety feature will work when needed.

Question 43Tanker vehicle inspection and pre-trip checks

You are inspecting a tanker and see that the cargo tank's data plate shows a lower maximum working pressure than the pressure the product normally generates. What should you do?

  1. Do not load the product until the tank and product are matched correctly Correct answer.
  2. Reduce the load to half and depart
  3. Release vapor from the tank until the pressure drops
  4. Load the product and watch the gauge closely

Explanation

A tank may only carry product within the pressure limits shown on its data plate. If the product's pressure could exceed those limits, the load must not be placed in that tank until the mismatch is resolved.

Question 44Tanker vehicle inspection and pre-trip checks

During the pre-trip, you check the cargo tank's high-level shutoff sensor used during loading. Which result shows it is working?

  1. The sensor triggers the shutoff before the tank is overfilled Correct answer.
  2. The sensor is missing but the alarm sounds
  3. The sensor only works when the engine is off
  4. The sensor is bypassed so loading is faster

Explanation

The high-level shutoff must stop the flow before the tank overfills, protecting against a spill. If the sensor is missing or bypassed, the overfill protection is gone and loading must not proceed.

Question 45Tanker vehicle inspection and pre-trip checks

You are checking the tanker's placards before departure. Which condition requires correction?

  1. A placard is missing from a side where the product requires it Correct answer.
  2. Each placard matches the product loaded
  3. The placards are clean and legible
  4. The placards are mounted on the tank where required

Explanation

Placards must be displayed on the required sides of the vehicle for the product being hauled. A missing placard means other drivers and responders are not warned of the hazard, so it must be corrected before departure.

Question 46Tanker vehicle inspection and pre-trip checks

You are inspecting a tanker with two compartments holding different products. What must you confirm during the pre-trip?

  1. The compartments are connected so the products mix evenly
  2. Both compartments use the same placard regardless of contents
  3. Each compartment's valves and lines are set for the product it holds Correct answer.
  4. The rear compartment is always left empty

Explanation

When compartments carry different products, the valves and lines for each compartment must be set so products do not mix or go to the wrong place. Placards must also reflect each product, so a single shared placard is not acceptable.

Question 47Tanker vehicle inspection and pre-trip checks

You find a small crack in a weld on the cargo tank's shell. The crack is not leaking. What is the correct decision for the pre-trip?

  1. Remove the product and have the crack repaired by a qualified tank repair facility Correct answer.
  2. Reduce the load and drive at lower speed
  3. Seal the crack with putty and depart
  4. Depart and note the crack for the next scheduled service

Explanation

A crack in the tank shell is a structural defect that can grow and lead to a release, even if it is not leaking now. The tank must be taken out of service and repaired by a qualified facility before it carries product again.

Question 48Tanker vehicle inspection and pre-trip checks

During the pre-trip, you check the cargo tank's pressure relief valve and find its discharge is pointed toward the cab. Why must this be corrected?

  1. It prevents the valve from being tested
  2. It can release product onto the cab and driver if the valve opens Correct answer.
  3. It increases the tank's working pressure
  4. It makes the valve harder to inspect

Explanation

A relief valve discharge must be directed away from the cab and occupied areas so a release does not expose the driver to product. The orientation must be corrected before the tanker is driven.

Question 49Tanker vehicle inspection and pre-trip checks

You are inspecting a tanker that carries a product requiring the tank to be kept under inert gas. Which pre-trip check applies?

  1. Confirm the dome covers are left unlatched
  2. Confirm the inert gas supply and the tank's pressure are within the required range Correct answer.
  3. Confirm the tank is vented wide open to the air
  4. Confirm the pressure gauge is disconnected

Explanation

When a product must be carried under inert gas, the supply and the tank pressure must be confirmed within the required range before departure. Opening the tank to air or leaving covers unlatched defeats the protection the inert gas provides.

Question 50Tanker vehicle inspection and pre-trip checks

You are checking the tank's emergency valve controls from the driver's position. The remote control does not release as designed. What does this mean for the trip?

  1. The tanker must not depart until the control is repaired Correct answer.
  2. It is acceptable if the load is small
  3. It is acceptable if the manual valves can be reached
  4. It is acceptable if the driver drives slowly

Explanation

The emergency valve remote must release as designed so the driver can stop product flow quickly in an emergency. If the control does not work, the tanker is not ready for service and must be repaired first.