ASE test prep UPDATED Questions and
CORRECT Answers
Technician A says the two types of trouble codes stored in the ECM are called inactive and
reactive. Technician B says trouble codes can tell the technician exactly what is wrong with the
vehicle. Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B - CORRECT ANSWER - D. Neither A or B
Technician A says that the batteries on a tractor should be covered by a fixed part of the vehicle.
Technician B says a removable cover must be used. Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B - CORRECT ANSWER - C. Both A and B
A tractor with a trailer connected to it exhibits a loud clunking noise in the rear of the cab,
accompanied by excessive movement at the trailer kingpin. Of the following, what is the MOST
LIKELY cause?
A. Cracked frame
B. Misadjusted locking wedge
C. Inadequately lubricated fifth wheel
D. Loose fifth wheel stops - CORRECT ANSWER - B. Misadjusted locking wedge
Technician A says some EVAP system charcoal canisters have replaceable air filters. Technician
B says the EVAP system is designed to help in cold engine operation. Who is right
A. Technician A only
B. Technician B only
,C. Both A and B
D. Neither A or B - CORRECT ANSWER - A. Technician A only
Technician A says when oil is being changed on a diesel engine; the engine should be at
operating temperature. Technician B says discolored oil is a sign that the engine is operating
properly. Who is right?
A. Technician A
B. Technician B
C. Both A and B
D. Neither A or B - CORRECT ANSWER - A. Technician A
The dual integrated push-pull valve is designed to:
A. Control air pressure of tractor parking brakes
B. Relieve excessive air pressure in the brake system
C. Control tractor parking brakes and trailer air supply
D. Apply parking brakes on a straight truck - CORRECT ANSWER - C. Control tractor
parking brakes and trailer air supply
Most manufacturers recommend an initial transmission oil change for highway vehicles after a
break-in period of:
A. 1000-1500 miles
B. 2500-3000 miles
C. 3000-4000 miles
D. 3000-5000 miles - CORRECT ANSWER - D. 3000-5000 miles
The brake lining on a tractor is being inspected. A high ridge has been found on the inside edge
of the linings. Technician A says the ridge makes drum removal easier. Technician B says the
ridge helps to keep water and contaminants out of the brake area. Who is right?
A. Technician A only
B. Technician B only
, C. Both A and B
D. Neither A or B - CORRECT ANSWER - C. Both A and B
Engine vibrations can be attributed to all of the following EXCEPT:
A. Turbocharger imbalance
B. Loose power steering pump
C. Cracked vibration damper
D. Loose U-joint - CORRECT ANSWER - D. Loose U-joint
During a scheduled maintenance visit, a truck's drive belts were replaced. After about one
thousand miles, one of the belts shows accelerated wear and must be replaced again. Technician
A says the belt was adjusted too tight. Technician B says the pulleys are misaligned. Who is
right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B - CORRECT ANSWER - B. Technician B only
U-bolt clamping force is being checked with a brass hammer, and the sound being made is a dull
thud. Technician A says the U-bolt is clamping properly. Technician B says the U-bolts should
be retorqued at specific intervals. Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B - CORRECT ANSWER - B. Technician B only
Which one of the following procedures is used to inspect the steering linkage.
A. Pitman check
B. Steering force check
C. Side-to-side check
CORRECT Answers
Technician A says the two types of trouble codes stored in the ECM are called inactive and
reactive. Technician B says trouble codes can tell the technician exactly what is wrong with the
vehicle. Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B - CORRECT ANSWER - D. Neither A or B
Technician A says that the batteries on a tractor should be covered by a fixed part of the vehicle.
Technician B says a removable cover must be used. Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B - CORRECT ANSWER - C. Both A and B
A tractor with a trailer connected to it exhibits a loud clunking noise in the rear of the cab,
accompanied by excessive movement at the trailer kingpin. Of the following, what is the MOST
LIKELY cause?
A. Cracked frame
B. Misadjusted locking wedge
C. Inadequately lubricated fifth wheel
D. Loose fifth wheel stops - CORRECT ANSWER - B. Misadjusted locking wedge
Technician A says some EVAP system charcoal canisters have replaceable air filters. Technician
B says the EVAP system is designed to help in cold engine operation. Who is right
A. Technician A only
B. Technician B only
,C. Both A and B
D. Neither A or B - CORRECT ANSWER - A. Technician A only
Technician A says when oil is being changed on a diesel engine; the engine should be at
operating temperature. Technician B says discolored oil is a sign that the engine is operating
properly. Who is right?
A. Technician A
B. Technician B
C. Both A and B
D. Neither A or B - CORRECT ANSWER - A. Technician A
The dual integrated push-pull valve is designed to:
A. Control air pressure of tractor parking brakes
B. Relieve excessive air pressure in the brake system
C. Control tractor parking brakes and trailer air supply
D. Apply parking brakes on a straight truck - CORRECT ANSWER - C. Control tractor
parking brakes and trailer air supply
Most manufacturers recommend an initial transmission oil change for highway vehicles after a
break-in period of:
A. 1000-1500 miles
B. 2500-3000 miles
C. 3000-4000 miles
D. 3000-5000 miles - CORRECT ANSWER - D. 3000-5000 miles
The brake lining on a tractor is being inspected. A high ridge has been found on the inside edge
of the linings. Technician A says the ridge makes drum removal easier. Technician B says the
ridge helps to keep water and contaminants out of the brake area. Who is right?
A. Technician A only
B. Technician B only
, C. Both A and B
D. Neither A or B - CORRECT ANSWER - C. Both A and B
Engine vibrations can be attributed to all of the following EXCEPT:
A. Turbocharger imbalance
B. Loose power steering pump
C. Cracked vibration damper
D. Loose U-joint - CORRECT ANSWER - D. Loose U-joint
During a scheduled maintenance visit, a truck's drive belts were replaced. After about one
thousand miles, one of the belts shows accelerated wear and must be replaced again. Technician
A says the belt was adjusted too tight. Technician B says the pulleys are misaligned. Who is
right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B - CORRECT ANSWER - B. Technician B only
U-bolt clamping force is being checked with a brass hammer, and the sound being made is a dull
thud. Technician A says the U-bolt is clamping properly. Technician B says the U-bolts should
be retorqued at specific intervals. Who is right?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A or B - CORRECT ANSWER - B. Technician B only
Which one of the following procedures is used to inspect the steering linkage.
A. Pitman check
B. Steering force check
C. Side-to-side check
