When does the tank-vehicle chapter call for an inspection of the tanker?
Correct answer: Before loading, unloading or driving it.
Each operation can expose different problems. Inspect the vehicle and the tank equipment before loading, unloading or driving, not just after a spill or at the start of an occasional trip.
Source: Washington Commercial Driver Guide, N/10/20; section 8, introduction; physical PDF 107, printed 8-1. ↗
A loaded tanker has a confirmed cargo leak. The delivery point is close. What should you do?
Correct answer: Keep it out of service for hauling and follow the cargo's safe response procedure.
Do not transport liquid or gas in a leaking tank. Secure the situation and follow the applicable response and reporting procedures; closeness to the destination is not a reason to keep hauling.
Source: Washington Commercial Driver Guide, N/10/20; section 8.1.1; physical PDF 107, printed 8-1. ↗
The tank shell appears sound. Where else must you look for possible cargo leakage?
Correct answer: At pipes, hoses, connections and especially their joints.
A sound-looking shell does not rule out a leaking connection. Inspect under and around the vehicle and pay close attention to joints, hoses, piping and valves.
Source: Washington Commercial Driver Guide, N/10/20; section 8.1.1; physical PDF 107, printed 8-1. ↗
A tanker has just finished unloading. Before moving it, what must be checked about its intake, discharge and cutoff valves?
Correct answer: That they are sound and set correctly for vehicle movement.
Valve positions must suit the operation. A setting appropriate during a transfer may be unsafe for travel; follow the equipment procedure and verify the required closure and leak checks.
Source: Washington Commercial Driver Guide, N/10/20; section 8.1.1; physical PDF 107, printed 8-1. ↗
During a manhole-cover inspection, which finding requires attention before the tanker is used?
Correct answer: A missing gasket or a cover that does not close correctly.
The gasket and proper closure are part of the containment check. A cover resting over the opening is not sufficient if its seal or closing mechanism is defective.
Source: Washington Commercial Driver Guide, N/10/20; section 8.1.1; physical PDF 107, printed 8-1. ↗
A tank vent appears obstructed. Which response follows the guide's inspection advice?
Correct answer: Have the obstruction corrected so the vent can function as designed.
Keep the specified vents clear and functional. Do not improvise by plugging them or driving with an unsecured cover; use the tank's approved maintenance and operating procedures.
Source: Washington Commercial Driver Guide, N/10/20; section 8.1.1; physical PDF 107, printed 8-1. ↗
You know how to inspect one tanker but are assigned a different design. What should guide the additional inspection?
Correct answer: The operator's manual for the actual tank vehicle.
Tanks differ in equipment and operating arrangements. Use the actual vehicle's operator information to identify the valves, containment parts and special systems that need checking.
Source: Washington Commercial Driver Guide, N/10/20; section 8.1; physical PDF 107, printed 8-1. ↗
Your tanker has vapor-recovery equipment and grounding/bonding cables. What does their presence require during inspection?
Correct answer: Check that the fitted systems and cables work as required.
The guide lists these as special-purpose items to check when fitted. Presence alone is not evidence of working condition; follow the applicable equipment and cargo procedures.
Source: Washington Commercial Driver Guide, N/10/20; section 8.1.2; physical PDF 107, printed 8-1. ↗
A required built-in emergency shutoff fails its prescribed check. What is the appropriate decision before loading?
Correct answer: Correct the defect and verify the system before the operation.
Emergency equipment needs to function before it is needed. A different valve or reduced load does not by itself establish that a failed required safety system can be disregarded.
Source: Washington Commercial Driver Guide, N/10/20; section 8.1.2; physical PDF 107, printed 8-1. ↗
How should you decide whether the tanker's emergency equipment is adequate for the trip?
Correct answer: Identify the equipment required for that vehicle and verify it is present and working.
The guide directs drivers to find out what equipment their particular vehicle requires and check its condition. Requirements may depend on the equipment and cargo; this is not a universal one-item checklist.
Source: Washington Commercial Driver Guide, N/10/20; section 8.1.3; physical PDF 107, printed 8-1. ↗
What makes a tanker's high center of gravity important when planning a turn?
Correct answer: A large share of its weight is high above the road, increasing rollover risk.
A high center of gravity makes the vehicle more top-heavy. Choose a safe low speed and smooth path; the enclosed shape of a tank does not make its load immune to rollover forces.
Source: Washington Commercial Driver Guide, N/10/20; section 8.2.1 and Figure 8.1; physical PDF 107, printed 8-1. ↗
A ramp's posted curve speed looks comfortable in a car. How should a tanker driver use that information?
Correct answer: Choose a lower safe entry speed; the posted value may be too fast for the tanker.
The guide warns that tankers can overturn at posted curve speeds. Reduce speed before the curve and account for the tank, load and road conditions rather than treating the sign as a guaranteed safe target.
Source: Washington Commercial Driver Guide, N/10/20; section 8.2.1; 8.3.3 on physical 108; physical PDF 107, printed 8-1. ↗
