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Sample Heavy Duty Equipment Technician Red Seal Exam Practice Questions
A – Common Occupational Skills
Which of the following selections would most likely cause a shortage of welding?
(A) Gas supply exhausted.
(B) Incorrect wire diameter.
(C) Wire supply exhausted.
(D) Gas regulator setting too high.
(B) Incorrect wire diameter.
(C) Wire supply exhausted.
(D) Gas regulator setting too high.
ANS. C
ENGINE AND SUPPORTING SYSTEMS
Upon inspection, the engine system’s NOx gas readings indicate that the operating levels are above Federally legislated levels. This could be a result of?
A) Cetane rating excessive.
B) Cetane rating too low.
C) EGR valve not functioning.
D) The engine timing is not advanced.
B) Cetane rating too low.
C) EGR valve not functioning.
D) The engine timing is not advanced.
ANS. C
HYDRAULIC SYSTEMS
3) A dump-box pulsates and produces a jerking-type of motion during lift cylinder extension. What could be the cause?
A) Worn-box-pivot bushings.
B) Reservoir over filled.
C) Restriction on the high-pressure side.
D) Worn pump.
Ans. D
DRIVE TRAIN
When a hydraulic retarder is applied continuously at high speeds?
A) The engine overheats.
B) The hydraulic fluid overheats.
C) The transmission is overheated
D) The engine RPM exceeds suggested operational range.
B) The hydraulic fluid overheats.
C) The transmission is overheated
D) The engine RPM exceeds suggested operational range.
Ans. B
ELECTRICAL AND ELECTRONIC SYSTEMS
5) An operator downshifts to decelerate and the Jacob Engine Brakes are inoperative whenever the throttle pedal is released. What may be the problem?
A) Clutch switch.
B) TPS.
C) Nothing this is normal operating condition.
D) ABS is in failure mode.
A) Clutch switch.
B) TPS.
C) Nothing this is normal operating condition.
D) ABS is in failure mode.
Ans. A
AIR SYSTEMS AND BRAKES
6) A new brake drum measures at 0.060in out-of-round. What is the correct procedure to follow?
A) Return as a defective casting.
B) Machine in order to provide a round surface.
C) Install in a hydraulic press in order to true the condition.
D) Install as-is because the heat of breaking will return it to shape.
Ans. A
A) Return as a defective casting.
B) Machine in order to provide a round surface.
C) Install in a hydraulic press in order to true the condition.
D) Install as-is because the heat of breaking will return it to shape.
Ans. A
STEERING, CHASSIS/FRAMES, SUSPENSION, WHEELS HUBS AND TIRES
7) A technician is overhauling a 5th wheel, what components can be replaced?
A) King pin.
B) Jaws.
C) Slide bogie.
D) Bolster plate.
A) King pin.
B) Jaws.
C) Slide bogie.
D) Bolster plate.
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Heavy duty equipment technicians diagnose, repair, adjust, overhaul, maintain, and test mobile heavy duty equipment. They are employed in various industries such as construction, forestry, mining, marine, oil and gas, material handling, landscaping and land clearing.
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