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New York CDL Tanker study materials
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New York CDL Tanker practice questions

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Question 1Tanker vehicle inspection and equipment

Before loading a cargo tank, which inspection item confirms the tank interior is safe for the intended product?

  1. Checking the PTO is engaged
  2. Verifying the tank has been cleaned and is free of residual product or vapor Correct answer.
  3. Checking that the internal visual gauge shows the last product
  4. Confirming the tank's exterior placards are properly displayed

Explanation

A cargo tank must be confirmed clean and free of incompatible residue or flammable vapor before loading, because mixing products or igniting residual vapor can cause fire, contamination, or a violent reaction. Interior condition is verified before any product enters the tank.

Question 2Tanker vehicle inspection and equipment

What is the primary purpose of a cargo tank's emergency shutoff valve at the discharge point?

  1. To measure the volume of product delivered
  2. To regulate product temperature during unloading
  3. To vent excess pressure from the tank during loading
  4. To stop the flow of product if a line or fitting fails Correct answer.

Explanation

Emergency shutoff valves are designed to close and stop product flow in the event of a line rupture, fitting failure, or other emergency. This limits the amount of hazardous material released.

Question 3Tanker vehicle inspection and equipment

When inspecting a tanker's surge baffles, what condition should the driver look for?

  1. Baffles that are painted a contrasting color
  2. Baffles that are loose, cracked, or missing Correct answer.
  3. Baffles that extend above the tank's liquid level
  4. Baffles that are stamped with the tank's serial number

Explanation

Baffles control liquid surge and keep the vehicle stable. Loose, cracked, or missing baffles allow excessive product movement, which can cause loss of control or tank damage, so they must be repaired before operation.

Question 4Tanker vehicle inspection and equipment

A tanker driver is checking the tank's vents before a trip. Which condition indicates a vent problem?

  1. The vent is located at the top of the tank
  2. The vent is fitted with a flame arrestor
  3. The vent is clogged with debris or product residue Correct answer.
  4. The vent is clear and unobstructed

Explanation

Vents allow air to enter and pressure to escape as product is loaded or unloaded. A clogged vent can cause the tank to over-pressurize or develop a vacuum, leading to structural damage or product release.

Question 5Tanker vehicle inspection and equipment

What should a driver confirm about the tank's manhole covers and gaskets during inspection?

  1. That they are left slightly open to relieve pressure
  2. That they are painted to match the tank
  3. That they seal tightly and the gaskets are not worn or damaged Correct answer.
  4. That they are locked with a padlock only during loading

Explanation

Manhole covers must seal tightly against sound gaskets to prevent leaks and vapor release in transit. Worn or damaged gaskets allow product or vapor to escape, creating fire and environmental hazards.

Question 6Tanker vehicle inspection and equipment

When checking the tank's internal valves, the driver should verify that they:

  1. Are wired permanently in the open position
  2. Remain closed unless actuated and close fully when released Correct answer.
  3. Open automatically when the engine starts
  4. Are removed during unloading

Explanation

Internal valves are designed to stay closed unless deliberately actuated and to close fully when released. This fail-safe behavior prevents unintended product release if a line or control fails.

Question 7Tanker vehicle inspection and equipment

A driver notices the tank's overturn protection on the top fittings is bent and no longer covers the valves. What is the correct action?

  1. Remove the damaged protection and continue
  2. Tape over the exposed fittings and proceed
  3. Continue the trip because overturn protection is only cosmetic
  4. Have the protection repaired before operating the vehicle Correct answer.

Explanation

Overturn protection shields top-mounted fittings from damage in a rollover, reducing the chance of a spill. Bent or missing protection means the fittings are exposed, so it must be repaired before the vehicle is operated.

Question 8Tanker vehicle inspection and equipment

What is the purpose of a cargo tank's high-level shutoff or overfill protection system?

  1. To measure product temperature during loading
  2. To stop product flow before the tank is overfilled Correct answer.
  3. To increase pumping speed during unloading
  4. To vent vapor during transport

Explanation

Overfill protection stops the flow of product before the tank reaches capacity, preventing spills and over-pressurization. This reduces the risk of fire, environmental release, and injury during loading.

Question 9Tanker vehicle inspection and equipment

During a walk-around inspection, a driver finds the tank's grounding/bonding cable frayed and broken. Why must this be corrected before loading flammable product?

  1. It keeps the tank's placards attached
  2. It is needed to dissipate static electricity that could ignite vapor Correct answer.
  3. It controls the tank's internal valve operation
  4. It affects the accuracy of the tank's volume gauge

Explanation

Grounding and bonding drain static electricity that builds up during loading and unloading. A broken cable leaves static charge able to arc and ignite flammable vapor, so it must be repaired before handling flammable product.

Question 10Tanker vehicle inspection and equipment

When inspecting the tank's discharge piping and hoses, which finding requires the vehicle to be placed out of service?

  1. A hose with a slightly faded outer cover
  2. A hose with a bulge or soft spot under pressure Correct answer.
  3. A fitting with a current inspection tag
  4. A pipe support with fresh paint

Explanation

A bulge or soft spot indicates internal hose damage that can lead to a sudden rupture and product release. Such a hose must be removed from service before the vehicle is operated.

Question 11Tanker vehicle inspection and equipment

A driver is preparing to unload a cargo tank and must confirm the emergency discharge control is functional. What does this control allow?

  1. Increasing tank pressure to speed unloading
  2. Remote shutdown of product flow from a safe location Correct answer.
  3. Bypassing the internal valves
  4. Automatic tank cleaning after unloading

Explanation

Emergency discharge controls let the operator stop product flow remotely, away from the point of discharge, if a leak or fire occurs. This protects the driver and limits the size of a release.

Question 12Tanker vehicle inspection and equipment

What should the driver check regarding the cargo tank's data plate and specification markings during inspection?

  1. That the plate is repainted each year
  2. That the plate is polished and readable from a distance
  3. That the plate is removed to avoid confusion
  4. That the plate is present and its markings match the tank's configuration Correct answer.

Explanation

The data plate identifies the tank's design specifications, including the products it is authorized to carry. It must be present and its markings must match the tank's actual configuration so the correct product is loaded.

Question 13Tanker vehicle inspection and equipment

A driver finds the tank's pressure relief valve seal broken and the valve appears stuck. What is the appropriate response?

  1. Tag the vehicle out of service until the valve is repaired Correct answer.
  2. Manually free the valve and continue the trip
  3. Load a smaller quantity to reduce pressure
  4. Operate normally because relief valves rarely activate

Explanation

A stuck or improperly sealed pressure relief valve may fail to relieve excess pressure, risking tank rupture. The vehicle must be placed out of service until the valve is repaired and resealed.

Question 14Tanker vehicle inspection and equipment

Which inspection item specifically addresses the risk of a cargo tank rolling over and releasing product from top fittings?

  1. The condition of the overturn protection and top fittings Correct answer.
  2. The color of the tank's reflective tape
  3. The tightness of the wheel lug nuts
  4. The date on the tank's cleaning certificate

Explanation

Overturn protection and the condition of top fittings determine whether a rollover would damage valves and vents and release product. Inspecting this protection directly addresses rollover release risk.

Question 15Tanker vehicle inspection and equipment

When inspecting the tank's interior through the manhole before loading, the driver observes a strong solvent odor and visible liquid residue. What does this indicate?

  1. The tank's vents are working correctly
  2. The tank requires cleaning and vapor removal before loading Correct answer.
  3. The tank's baffles are properly installed
  4. The tank is ready to load the same product

Explanation

Liquid residue and strong odor indicate the tank was not properly cleaned and may contain flammable or incompatible vapor. Loading without cleaning risks contamination, fire, or reaction, so cleaning and vapor removal are required first.

Question 16Tanker vehicle inspection and equipment

A driver must verify that the tank's internal valves close automatically when the control is released. Why is this automatic closure important?

  1. It prevents unintended release if the operator loses control of the valve Correct answer.
  2. It reduces the tank's weight during transport
  3. It speeds up the loading process
  4. It allows the tank to vent automatically

Explanation

Automatic closure is a fail-safe feature: if the operator releases the control or a line fails, the valve shuts and stops product flow. This limits spills and fire risk during loading and unloading.

Question 17Tanker vehicle inspection and equipment

During inspection, a driver notices the tank's vapor recovery connection is cracked. Why does this matter for a tanker carrying flammable liquid?

  1. It has no effect because vapor recovery is optional
  2. It changes the tank's legal weight limit
  3. It improves the tank's fuel economy
  4. It allows vapor to escape and creates a fire hazard during loading Correct answer.

Explanation

A cracked vapor recovery connection can release flammable vapor during loading, creating a fire or exposure hazard and defeating emission controls. The connection must be sound before loading begins.

Question 18Tanker vehicle inspection and equipment

What is the correct way to confirm that a cargo tank's emergency shutoff valve will function during an unloading emergency?

  1. Check that the valve handle is painted red
  2. Assume it works because it passed last year's test
  3. Operate the remote control and confirm the valve closes Correct answer.
  4. Listen for air escaping from the valve body

Explanation

The only reliable confirmation is to actuate the emergency control and observe that the valve actually closes. Functional testing verifies the valve will stop flow when needed rather than relying on assumptions.

Question 19Tanker vehicle inspection and equipment

A driver is inspecting a tank equipped with both internal valves and an emergency discharge control. Which statement best describes how these systems work together?

  1. The internal valves close only when the emergency control is activated manually at the valve
  2. The emergency control only works when the engine is running
  3. The emergency control can close the internal valves remotely to stop flow Correct answer.
  4. The internal valves override the emergency control during unloading

Explanation

Emergency discharge controls are designed to actuate the internal valves remotely so flow can be stopped from a safe location. This combined function protects the driver and limits a release during an emergency.

Question 20Tanker vehicle inspection and equipment

A tanker's pressure relief valve is set to open at its design pressure, but the driver notices product residue around the valve outlet. What is the most likely explanation and correct action?

  1. The valve has been relieving or leaking; inspect and repair before operating Correct answer.
  2. Normal condensation; no action needed
  3. The tank was overfilled; continue the trip
  4. The vent is working properly; no action needed

Explanation

Residue at the relief valve outlet suggests the valve has opened or is leaking, which can indicate over-pressurization or a defective valve. The system must be inspected and repaired before further operation.

Question 21Tanker vehicle inspection and equipment

A driver is inspecting a cargo tank and finds the data plate lists a product the tank is not currently configured to carry. What is the safest interpretation?

  1. The tank's configuration and authorized products must be reconciled before loading Correct answer.
  2. The tank can carry the product because the plate lists it
  3. The plate should be removed to avoid confusion
  4. The plate is outdated and can be ignored

Explanation

The data plate must match the tank's actual configuration so only authorized products are loaded. A mismatch means the tank's authorization must be reconciled before any product is loaded.

Question 22Tanker vehicle inspection and equipment

Which inspection finding on a tanker's hoses and fittings most directly indicates a risk of catastrophic failure during unloading?

  1. A hose stored on a proper rack
  2. A fitting with a clean, dry surface
  3. A fitting with a deep crack at the weld Correct answer.
  4. A hose with a current pressure test tag

Explanation

A deep crack at a weld in a fitting can propagate and cause sudden rupture under pressure, releasing product. Cracks in pressure-containing components require immediate repair or replacement.

Question 23Tanker vehicle inspection and equipment

A driver must decide whether a tank with a clogged vent can be loaded. What is the best reasoning?

  1. Do not load until the vent is cleared, because pressure or vacuum can damage the tank Correct answer.
  2. Remove the vent and load without it
  3. Load normally because vents only matter during transport
  4. Load slowly to avoid pressure buildup

Explanation

A clogged vent prevents pressure equalization, so loading can over-pressurize or later create a vacuum that damages the tank. The vent must be cleared before loading begins.

Question 24Tanker vehicle inspection and equipment

What is the purpose of inspecting the tank's baffles for secure attachment to the tank shell?

  1. To confirm the tank's capacity
  2. To ensure the baffles can resist liquid surge forces Correct answer.
  3. To verify the tank's paint coverage
  4. To check the tank's placard placement

Explanation

Baffles must be securely attached so they can withstand the forces of liquid surging during braking and turning. Loose baffles can fail and allow dangerous load shift.

Question 25Tanker vehicle inspection and equipment

A driver is inspecting the tank's grounding cable and finds it intact but the clamp is corroded and makes poor contact. Why is this a problem?

  1. It prevents the tank from being filled to capacity
  2. It changes the tank's pressure relief setting
  3. It can prevent effective grounding and allow static buildup Correct answer.
  4. It affects the tank's placard readability

Explanation

Effective grounding depends on a clean, low-resistance connection. A corroded clamp can prevent static charge from draining, allowing a spark that could ignite flammable vapor during transfer.

Question 26Tanker vehicle inspection and equipment

During a pre-trip inspection of a cargo tank, which component keeps liquid product from surging forward and destabilizing the vehicle during a stop?

  1. The discharge hose rack
  2. The vapor recovery line
  3. The data plate bracket
  4. The baffle plates inside the tank Correct answer.

Explanation

Baffles divide the interior of a cargo tank into compartments that limit the forward and backward surge of liquid. This surge control keeps the load from shifting violently and helps maintain vehicle stability during braking and turning.

Question 27Tanker vehicle inspection and equipment

What is the primary reason a cargo tank must have a way to relieve internal pressure that builds up from heat or loading?

  1. To prevent the tank shell or fittings from rupturing Correct answer.
  2. To reduce the weight of the vehicle
  3. To speed up the unloading process
  4. To increase the tank's payload capacity

Explanation

Heat, loading, and product vapor can raise internal pressure beyond what the shell is designed to hold. A relief device vents that pressure so the tank and its fittings are not overstressed and ruptured.

Question 28Tanker vehicle inspection and equipment

Which document item on a cargo tank's specification plate tells the driver the maximum product density the tank may carry?

  1. The test date
  2. The marked maximum allowable working pressure
  3. The tank serial number
  4. The marked maximum product weight per gallon Correct answer.

Explanation

A cargo tank data plate lists the maximum product weight per gallon the tank is designed to carry. Loading a denser product can overload the shell even if the tank appears only partly full.

Question 29Tanker vehicle inspection and equipment

Before loading a tanker, a driver should confirm that the tank's vents and vent lines are open and unobstructed because blocked vents can cause:

  1. the product to be filtered as it enters the tank
  2. pressure or vacuum to build and damage the tank Correct answer.
  3. the brake system to lose air pressure
  4. the data plate to become invalid

Explanation

Vents allow air and vapor to move in and out as the tank is filled or emptied. If a vent is blocked, pressure or vacuum can build and stress the shell or fittings, so vents must be clear before loading.

Question 30Tanker vehicle inspection and equipment

A driver is checking the emergency discharge control on a tanker before unloading. What should the driver confirm about the remote control?

  1. That it can be operated from a safe distance from the discharge point Correct answer.
  2. That it is located inside the cab
  3. That it is locked so it cannot be activated accidentally
  4. That it only works when the engine is running

Explanation

Emergency discharge controls must be operable from a location away from the point where product is being discharged. This lets the driver stop the flow without approaching a spill or fire at the discharge connection.

Question 31Tanker vehicle inspection and equipment

How should a driver test the function of a cargo tank's internal valves during a pre-trip inspection?

  1. By checking the tire pressure
  2. By reading the data plate
  3. By opening the manhole and looking inside
  4. By operating the control and confirming the valves open and close Correct answer.

Explanation

Internal valves are tested by operating their control and observing that they respond, opening and closing as commanded. A valve that fails to close can allow product to escape if a line is broken.

Question 32Tanker vehicle inspection and equipment

Why must a driver inspect the cargo tank's grounding and bonding connections before transferring flammable product?

  1. To keep the product from freezing
  2. To keep the tank's paint from fading
  3. To improve fuel mileage
  4. To prevent static electricity from igniting vapor Correct answer.

Explanation

Flowing product can generate static electricity, and an ungrounded tank can discharge a spark near flammable vapor. Grounding and bonding drain that charge safely to earth, so the connections must be intact.

Question 33Tanker vehicle inspection and equipment

During the walk-around, a driver finds the cargo tank's discharge hose has a deep cut through its outer cover exposing the reinforcement. What action is required?

  1. Replace the hose before use Correct answer.
  2. Reduce the unloading pressure and use it
  3. Mark the hose and use it only for water
  4. Wrap the cut with tape and continue

Explanation

A hose with damage exposing its reinforcement has lost structural integrity and can burst under pressure. It must be removed from service and replaced, not patched or used at reduced pressure.

Question 34Tanker vehicle inspection and equipment

A driver is checking the tank's top fittings and finds the manhole cover gasket is cracked and flattened. Why does this finding matter?

  1. It makes the tank heavier
  2. It affects only the appearance of the tank
  3. It changes the tank's pressure rating
  4. It can allow vapor or product to escape and let water in Correct answer.

Explanation

The manhole gasket seals the cover against the tank. A cracked or flattened gasket can leak vapor or liquid and can admit water or contaminants, so it must be replaced before the tank is used.

Question 35Tanker vehicle inspection and equipment

A tanker's pressure relief valve is found with its seal intact and the valve free of product residue. What does this condition indicate to the driver?

  1. The tank is overfilled
  2. The valve must be replaced immediately
  3. The valve has never been installed
  4. The valve has not recently opened and appears undisturbed Correct answer.

Explanation

An intact seal and a clean valve suggest the relief valve has not recently vented product and has not been tampered with. This is a normal, acceptable finding during inspection.

Question 36Tanker vehicle inspection and equipment

A driver is about to load a tank and notices the overturn protection over the top fittings is missing. What is the best reasoning about whether to proceed?

  1. Proceed, because overturn protection is optional
  2. Proceed and check the protection after unloading
  3. Proceed if the load is small
  4. Do not load until the protection is restored, because top fittings could be damaged in a rollover Correct answer.

Explanation

Overturn protection shields top fittings so they are less likely to break and release product if the tank rolls over. Without it, the tank does not meet its design protection, so loading should wait until it is repaired.

Question 37Tanker vehicle inspection and equipment

While inspecting a tank's piping, a driver finds the piping support bracket is loose and the pipe can move. Why is this a concern?

  1. It can chafe or crack the piping and connections, leading to a leak Correct answer.
  2. It improves product flow
  3. It makes the tank easier to steer
  4. It has no effect on safety

Explanation

Piping that is not properly supported can vibrate and flex, which can chafe, crack, or loosen joints and cause a leak. Supports must hold the piping securely.

Question 38Tanker vehicle inspection and equipment

A driver finds the cargo tank's internal valve control has a broken return spring, so the valve does not close when the handle is released. What does this indicate?

  1. The valve may not close automatically in an emergency Correct answer.
  2. The spring only affects the gauge reading
  3. The valve will close faster than normal
  4. The tank is safe to load without repair

Explanation

Internal valves are designed to close automatically when the control is released, stopping flow if a line fails. A broken return spring defeats that automatic closure, so the valve must be repaired before use.

Question 39Tanker vehicle inspection and equipment

During inspection, a driver notices the tank's vapor recovery hose coupling has a missing gasket. What is the correct response?

  1. Replace the gasket so the connection seals properly Correct answer.
  2. Disconnect the vapor line permanently
  3. Load anyway and rely on the vapor line being optional
  4. Tighten the coupling harder without a gasket

Explanation

A missing gasket prevents a tight seal at the vapor recovery coupling, allowing vapor to escape. The gasket must be replaced so the connection seals and vapor is contained.

Question 40Tanker vehicle inspection and equipment

A driver is inspecting a cargo tank and finds the data plate is missing. What is the appropriate action?

  1. Paint a new plate by hand
  2. Do not use the tank until the plate is restored Correct answer.
  3. Proceed, since the tank looks undamaged
  4. Proceed if the driver remembers the specifications

Explanation

The data plate documents the tank's specifications, limits, and test status, and its presence is required. Without it the driver cannot verify what the tank is rated to carry, so the tank should not be used until the plate is restored.

Question 41Tanker vehicle inspection and equipment

Why should a driver confirm that a cargo tank's baffles are securely attached to the tank shell before loading?

  1. To improve the tank's appearance
  2. To keep the product from being filtered
  3. To prevent baffles from breaking loose and causing a violent load shift Correct answer.
  4. To ensure the tank holds the correct volume

Explanation

Baffles must stay fixed to the shell to control liquid surge. If a baffle breaks loose, the load can shift suddenly and destabilize the vehicle, so secure attachment is a safety check.

Question 42Tanker vehicle inspection and equipment

A driver finds the cargo tank's discharge piping drain valve leaking a small amount of product. What is the correct action before loading?

  1. Load only a partial load
  2. Place a bucket under the leak
  3. Ignore it because the leak is small
  4. Repair the leak before using the tank Correct answer.

Explanation

Any product leak from piping is a defect that must be corrected before the tank is used. Even a small leak can create a fire hazard and contaminate the environment.

Question 43Tanker vehicle inspection and equipment

What is the purpose of a cargo tank's emergency shutoff valve located at the discharge outlet?

  1. To stop the flow of product if the discharge line is damaged Correct answer.
  2. To measure the volume delivered
  3. To regulate the product temperature
  4. To filter impurities from the product

Explanation

The emergency shutoff valve can stop product flow quickly if a discharge line breaks or an emergency develops. This limits the amount of product released.

Question 44Tanker vehicle inspection and equipment

A driver is inspecting a tank's pressure relief valve and finds it painted over so the valve cannot move. What is the correct interpretation?

  1. The paint only affects the valve's color
  2. The paint protects the valve and is acceptable
  3. The valve may be stuck and must be corrected before use Correct answer.
  4. The valve will work better with paint

Explanation

A relief valve must be free to open when pressure rises. Paint that binds the valve can prevent it from relieving pressure, so the condition must be corrected before the tank is used.

Question 45Tanker vehicle inspection and equipment

A driver notices the tank's high-level sensor wiring is chafed and exposed near the top fittings. Why should this be corrected before loading?

  1. It improves the sensor's accuracy
  2. It can short and defeat the overfill protection, allowing the tank to be overfilled Correct answer.
  3. It makes the tank lighter
  4. It is only a cosmetic issue

Explanation

Exposed or chafed wiring can short out and disable the high-level shutoff that prevents overfilling. Without working overfill protection, the tank can be filled beyond its safe limit.

Question 46Tanker vehicle inspection and equipment

A driver is preparing to load a tank and finds the tank's internal valve control is labeled in a way that does not match the valve positions. What is the safest course of action?

  1. Verify actual valve positions by operating the control before loading Correct answer.
  2. Load using the labels as they are
  3. Load only a small quantity
  4. Assume the labels are correct

Explanation

Mismatched labeling can cause the driver to believe a valve is closed when it is open. The driver should operate the control and confirm the actual valve positions before any product is transferred.

Question 47Tanker vehicle inspection and equipment

A driver inspecting a cargo tank finds the shell has a dent near a weld seam with no visible crack. What is the best reasoning about whether the tank may be loaded?

  1. The dent can be ignored if it is small
  2. Any dent is acceptable if no product is leaking
  3. The dent must be evaluated because damage near a weld can weaken the shell Correct answer.
  4. The dent improves the tank's strength

Explanation

Damage near a weld seam can compromise the shell's integrity even without an obvious crack. The tank should be evaluated by a qualified person before it is loaded.

Question 48Tanker vehicle inspection and equipment

A driver is checking a cargo tank's emergency discharge control and finds the remote actuator is located where a spill at the discharge point would block access. What is the correct conclusion?

  1. The driver should rely on closing the internal valves by hand
  2. The actuator should be moved inside the cab only
  3. The location is acceptable because the actuator exists
  4. The actuator location does not provide safe emergency shutdown and must be addressed Correct answer.

Explanation

The emergency control must be reachable from a location that is safe from the discharge point. If a spill would block access, the control cannot serve its purpose and the arrangement must be corrected.

Question 49Tanker vehicle inspection and equipment

A driver finds a cargo tank's vent line routed so that it terminates below the level of the top fittings and could collect liquid. Why is this a problem?

  1. It makes the tank easier to clean
  2. Liquid trapped in the vent can block venting and cause pressure or vacuum damage Correct answer.
  3. It improves vapor recovery
  4. It increases the tank's capacity

Explanation

A vent that can trap liquid may become blocked, preventing air and vapor from moving freely. This can allow pressure or vacuum to build and damage the tank, so the routing must be corrected.

Question 50Tanker vehicle inspection and equipment

A driver is inspecting a tanker's hoses and finds the date of the last pressure test is not marked and cannot be verified. What is the best course of action?

  1. Cut off the damaged end and use it
  2. Do not use the hose until its test status is verified Correct answer.
  3. Use the hose since it looks new
  4. Use the hose only at low pressure

Explanation

Hoses must have verifiable test status to confirm they can safely handle transfer pressure. If the test date cannot be established, the hose should be kept out of service until its status is confirmed.