If the tractor is bumped or pushed by the trailer every time a driver stops, the systems most likely causing the problem are:
A. the tractor's air brakes or the coupling system
B. the trailer's air brakes or the coupling system
C. the axles and sliding tandems
D. the suspension system or tires
Answer: B
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The part that is MOST-Likely a rear seal is the:
A. flywheel bolt B. rope seal C. clutch D. gasket
The pressure relief valve ____.
A. regulates the pressure of the water in the supply line B. is set to relieve the pressure in the boiler below its maximum design pressure C. shuts the boiler off if the water temperature gets too high D. relieves the pressure in the expansion tank
Evaluate: 
Fill in the blank(s) with the appropriate word(s).
There are four basic foundation designs from which to choose: basement, crawl space, ____, and piers, each of which can be constructed using a variety of materials and methods.
A. slab-on-grade B. footings C. columns D. pallets