ASE Diesel 42 Practice Test With
Solutions
When a diesel engine is operated under a load, coolant continually comes out of the radiator overflow
and there are bubbles in the radiator. Which of these is the most likely cause?
(A) Too much coolant in the cooling system
(B) A clogged radiator
(C) A stuck-open thermostat
(D) Compression leakage into the cooling system - โ โ D
When an air reservoir tank is drained, there is an excessive amount of moisture. This could be caused by
a:
(A) cracked air compressor bracket.
(B) clogged air compressor intake.
(C) failed one way check valve. (D) failed air dryer purge valve. - โ โ D
When performing a battery load test on a multiple battery vehicle: (A) connect the load test clamps to
any positive battery post and ground.
(B) disconnect the ground cable(s) from the frame.
(C) connect the load test amps clamp around a negative vehicle battery cable.
(D) isolate the batteries from each other. - โ โ D
When pressure testing a cooling system, the technician should apply:
(A) 5 pounds of pressure with the engine running.
(B) the amount of pressure listed on the radiator cap.
(C) pressure not to exceed the danger zone on the pressure gauge.
(D) 5 pounds more pressure than listed on the radiator cap. - โ โ B
Which of these can cause a no-start condition on a HEUI engine?
(A) High fuel pressure
