CDL Tanker Practice Test 2
Why are specials skills and knowledge required to drive a tanker?
All of the above. Tankers have a high center of gravity which increases the risk of rollover. Liquid surge (movement of liquid in partially filled tankers) can also have negative effects on handling.
Dividers inside tankers that have holes in them are known as what?
Baffles. Baffles are bulkheads that have holes in them to let liquid flow through.
Why are baffles used in some tankers?
To control forward-and-back liquid surge. Baffles are bulkheads that have holes in them to let liquid flow through. Baffles help control forward and backward liquid surge but not side to side liquid surge.
Why should you have sufficient outage in a tanker truck?
To reduce the chance of leaks due to liquid expansion. Outage is the free space left in a tanker to allow for expansion of the liquid from temperature changes.
How should you drive on curves with a tanker vehicle?
Slow down before the curve, then accelerate through the curve. Because tankers have a high center of gravity, there is an increased risk of rollovers, especially on curves. You should drive at speeds well below the posted speed.
Why do you need to know the outage requirements when hauling liquids in bulk?
Outage requirements vary across liquids. Different liquids expand by different amounts resulting in different outage requirements.
In which direction do baffled tanks NOT usually prevent the movement of surge?
Side to side. Baffled tanks are designed to control forward and backward surge. Side to side surge can still occur, which may result in rollovers.
How does a baffled tanker handle differently than a tanker with baffles?
The baffled tanker will have less front to back surge than the unbaffled tanker. Baffled tanks are designed to control forward and backward surge. Side to side surge can still occur, which may result in rollovers.
Which of the following is a potential danger of side to side surge?
Rollover. A side to side surge may increase your chance of rollover by exerting force sideways on your vehicle.
Which of the following is a liquid tight divider between compartments inside of a tank?
Bulkhead. Bulkheads divide a tank into several smaller separate tanks. Baffles are bulkheads that have holes in them to let liquid flow through.