Test 2 Exam.
The most common type of power steering hydraulic pump used on most Class 8
trucks/tractors equipped with power steering systems is:
A. Gear
B. Vane
C. Plunger
D. Centrifugal - Correct Answer B. Vane
Technician A says to inflate mounted tires in a safety cage or using a portable lock ring
guard. Technician B says to first mount the tire on the truck, then inflate to the proper tire
pressure.
A. A only
B. B only
C. Both A and B
D. Neither A nor B - Correct Answer A. A only
While performing an inspection on a heavy-duty tractor, the technician finds the frame rail
buckled. Which of the following might be the cause for this condition?
A. Too many holes drilled in the frame
B. Extreme operating conditions
C. The wrong bolts used in a repair
D. A vehicle collision - Correct Answer D. A vehicle collision
Camber may be defined as:
A. The forward or rearward tilt of the kingpin at the top
B. The tracking angle of the tires from a true straight-ahead track
C. The inward or outward tilt of the top of the wheel when viewed from the front of the
vehicle
, D. The amount in degrees that the top of the kingpin inclines away from vertical as viewed
from the front of the vehicle - Correct Answer C. The inward or outward tilt of the top of the
wheel when viewed from the front of the vehicle
A technician finds tat the power steering system is overheating. This condition may be
caused by all of the following EXCEPT:
A. A loose steering shaft flex joint
B. Underlubricated ball joints
C. A kink or pinch in the fluid return line
D. Blocked airflow across the heat exchanger - Correct Answer A. A loose steering shaft
flex joint
Suspension components are replaced on a medium-duty truck with single-air-valve rear
air suspension. technician
A says aa tape measure can be used to measure from a frame straightedge to the drive
axle. Technician B says if the distance from the axle to a fixed straightedge is different on
each side of the suspension, one of the front equalizing beam bushings may be worn.
Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - Correct Answer B. B only
Technician A says that the minimum and maximum air pressure going to the air bags is
controlled by the pressure protection valve. Technician B says that the minimum air
pressure in the bags should not to be less than 3 psi. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B - Correct Answer B. B only
Excessive tire wear is noted on a heavy-duty tractor. Which of the following suspension
components is the LEAST LIKELY cause?