Study Mode - Pre-Trip Inspection NEW

21

During the horn check, which horns must you demonstrate as working properly?

Only the air horn

Only the electric horn

Horn check is not required

Both the electric horn and the air horn ✓ CORRECT

22

During the external lights operations check, you may ask the examiner to assist while you:

Skip the light check if it is daytime

Direct them to front, sides, and rear as you operate the lights ✓ CORRECT

Ask them to inspect only the headlights

Ask them to inspect only the rear lights

23

When checking engine oil level, the correct method includes:

Check oil after driving only

Dipstick present, pull out, wipe, recheck, and level within full or refill mark ✓ CORRECT

Add oil until it reaches the top of dipstick tube

Check oil color only

24

During steering system inspection, the steering box and hoses should be:

Greased heavily with visible grease

Properly mounted with no missing bolts and no leaks ✓ CORRECT

Painted and clean

Warm to the touch

25

During tire inspection, steer axle tires must have minimum tread depth of:

2/32 inch

4/32 inch ✓ CORRECT

1/32 inch

6/32 inch

26

For air and electrical lines and connectors between tractor and trailer, they must be:

Only checked if hauling hazmat

Taped is acceptable if no wires show

Seated, sealed, locked, not cut or worn, and not dragging with no air leaks ✓ CORRECT

Allowed to hang if not touching ground

27

Learning question: While driving on the highway at about 55 MPH, what is the pressure in the blue service line and the red emergency line?

Blue about 20 PSI and red about 45 PSI

Blue about 125 PSI and red 0 PSI

Blue 0 PSI and red about 125 PSI ✓ CORRECT

Blue about 55 PSI and red about 55 PSI

28

Learning question: While driving on the highway at about 55 MPH, what is the pressure in the blue service line and the red emergency line?

Blue about 20 PSI and red about 45 PSI

Blue about 125 PSI and red 0 PSI

Blue 0 PSI and red about 125 PSI ✓ CORRECT

Blue about 55 PSI and red about 55 PSI