New York CDL Tanker flashcards
New York CDL Tanker · Build recall with a focused review session.
32 cards. Read the term and the definition here. The deck at the top of this page is optional.
- Tank specification marking
- A code on the tank (for example MC 306, DOT 406, MC 307, DOT 407, MC 312, DOT 412, MC 331) that must match the product being hauled.
- Specification plate data
- The plate on a cargo tank shows design pressure, water capacity, maximum allowable working pressure, and the date of the last test; an expired test date bars loading.
- Shear-section stop valve
- A valve on each discharge outlet that closes automatically if the valve is sheared off, limiting the loss of product in an accident.
- Vent and relief valve check
- The pre-trip must confirm the vent or pressure/vacuum relief valve is the correct type and unobstructed; a blocked vent can rupture or collapse the tank.
- Baffle inspection
- Baffles or bulkheads divide the tank and slow liquid movement; damaged or missing baffles turn the tank into a surge hazard and must be reported.
- Tanker emergency kit
- Carries the shipping paper, emergency response information, a fire extinguisher rated for the cargo, and spill-control material suited to the product.
- Grounding and bonding cable
- The cable and clamps connect the tank to the loading rack and to earth; they must be intact and the clamps clean for good metal-to-metal contact.
- Tanker tire and suspension check
- A tanker's high center of gravity makes a soft or damaged tire a rollover risk, so all tires and the suspension are checked at every pre-trip.
- Curve advisory speed limit
- The posted curve speed is set for passenger cars; a loaded tanker must slow well below it because its center of gravity is higher.
- Liquid surge
- The front-to-back and side-to-side movement of liquid in a partly filled tank; it can push the vehicle into a rollover or a jackknife.
- Outward force formula
- The sideways force in a curve equals mass times speed squared divided by radius (a = v^2 / r); doubling speed quadruples the force on the liquid.
- Partial fill danger
- A partly filled smooth bore tank is the most dangerous configuration because the liquid can move freely and build large surge forces.
- Tanker braking technique
- Brake early and progressively; a hard stop sends liquid forward, unloads the rear axle, and can cause a jackknife.
- Engine braking on smooth bore
- Abrupt downshifts and engine braking on a smooth bore tank send liquid forward and can break rear-wheel traction, especially on slippery pavement.
- Tanker stopping distance
- A tanker needs a longer stopping distance than a dry van at the same gross weight because the moving liquid keeps pushing the vehicle forward.
- Grade gear selection
- Choose a gear low enough to climb a grade without shifting, because a shift on a grade can let the liquid surge and the vehicle roll back.
- Route weight and height check
- Before the trip, compare the loaded weight and height against posted bridge and weight limits along the planned route.
- 98 percent filling limit
- A liquid cargo tank may be filled to no more than 98 percent of its water capacity at 60 degrees F (49 CFR 173.24b); the rest is expansion room.
- Product compatibility check
- Before loading, confirm the tank specification matches the product and that the previous product is compatible or the tank has been cleaned.
- Bonding before loading
- Connect the tank to the loading rack and ground the rack before attaching the hose; this equalizes static charge between tank and source.
- Keep bonding until disconnect
- Leave the bonding and grounding connection in place until the transfer is complete and the hose is disconnected; breaking it early can spark.
- Loading area rules
- For a flammable liquid, shut off the engine, set the parking brake, and prohibit smoking and spark sources in the transfer area.
- Unloading with own pump
- When the vehicle's pump is used the engine runs; the driver must stay at the controls and the vehicle must be chocked or the brake set.
- Vapor valve during transfer
- Open the vapor valve or vent as the system requires; a closed vapor path or plugged vent can overpressure or collapse the tank.
- Post-unloading steps
- Close all valves, drain the hose before disconnecting, cap the outlets, and check the tank and piping for leaks before moving the vehicle.
- Tank vehicle N endorsement
- A CDL with the tank vehicle (N) endorsement is required to drive a tank vehicle; it is separate from the hazardous materials (H) endorsement.
- Hazmat H endorsement
- Required to haul placarded hazmat; it requires the knowledge test and a TSA security threat assessment before issuance or renewal.
- Placarding thresholds
- Placards are required for 1,001 pounds or more aggregate gross weight of a Table 2 hazmat, for any quantity of a Table 1 material, and when the shipping paper requires them.
- Shipping paper access
- The shipping paper must be within the driver's reach and show the emergency response telephone number; emergency response information must also be carried.
- Railroad crossing stop
- A tank vehicle carrying hazmat must stop before crossing a railroad grade crossing unless it is exempted; look and listen rather than relying on the gate.
- Unattended placarded vehicle
- A placarded tank vehicle must not be left unattended on a public street unless a qualified person attends it or it is secured against unauthorized movement.
- Smoking and fire distance
- No smoking or lit smoking device within 25 feet of a placarded vehicle, and no parking within 5 feet of a fire source.