Heavy Duty Technician Practice Exam
And 100% Correct Answers 2025-2026
Updated.
When installing camshaft gears where is it critical that the timing marks will be? - Answer
They must face away from the camshaft
If a Timing Chain in an engine has a chain deflection of how much of an inch it should be
replaced? - Answer If it has a deflection of 0.50 of an inch
What is the pitch of a metric micrometer? - Answer 0.5 mm
A bio-degradable fluid must be able to have what percent of the base fluid broken down in a
certain period of time? - Answer 70 - 80%
What are system and circuit relief valves commonly installed in heavy equipment - Answer
Commonly installed in the Directional Control Valve
What's important to do when installing bearings? - Answer Not to touch the bearing surface
with your fingers
A scaffold must be designed and constructed to support at least how many times the load that
may be imposed of it? - Answer At least 4 the load that may be imposed of it
What WHMIS Class symbol has only a flame? - Answer Class B (Combustible Materials)
Grease is made up of approximately what percentage of oil? - Answer 70 - 90% oil
A bias ply tire on a heavy-duty vehicle is best suited for what type of application? - Answer
Low speed and lower load
What is the metric term for Energy? - Answer Joule
What is the problem in a manual transmission that is noisy under load in all reduction gears? -
Answer Cluster Shaft bearings is worn
, What is the possible cause for chattering on the cylinder rod and a noisy pump on a cushion ride
system? - Answer Loose connection on the oil inlet side of the pump
What is the cause of repeated low mileage U-joint failure? - Answer High Speed, high angel
operation
What is done to detect a leak on the primary side of a diesel engine fuel system? - Answer
Apply minimal pressure to fuel tank and checks lines for leaks with soap and water
What is done to test the pickup coil in an electronic ignition? - Answer Test coil at 60 Celsius
What will cause the steering wheel to rotate by itself on an articulating steering system? -
Answer Internal wear in the metering pump
The purpose of the fuel vapor return line is to return to the fuel tank any vapour? - Answer
develops in the fuel pump
What WHIMIS Class symbol has a Skull? - Answer D1 Class (Immediate and serious toxic
effects)
To check the slack adjuster you should? - Answer Park on level ground, place wheel chocks,
turn off parking brakes, and pull hard on each slack adjuster. It shouldn't move more then one
inch
How many seconds of space ahead of you should you be when driving a 100ft twin trailer
combination at 50 mph when the road is dry and the visibility is good? - Answer 11 seconds
What does DC stand for? - Answer Direct Current
What does AC stand for? - Answer Alternating Current
What is the MINIMUM Tensile strength for an E6010 electrode? - Answer 60,000 psi
(413,685 Kpa)
Same question on 24, but with AWS E7018 - Answer 70,000 psi (482,633 Kpa)
What does E stand for in SMAW Accessories? - Answer Electrode
And 100% Correct Answers 2025-2026
Updated.
When installing camshaft gears where is it critical that the timing marks will be? - Answer
They must face away from the camshaft
If a Timing Chain in an engine has a chain deflection of how much of an inch it should be
replaced? - Answer If it has a deflection of 0.50 of an inch
What is the pitch of a metric micrometer? - Answer 0.5 mm
A bio-degradable fluid must be able to have what percent of the base fluid broken down in a
certain period of time? - Answer 70 - 80%
What are system and circuit relief valves commonly installed in heavy equipment - Answer
Commonly installed in the Directional Control Valve
What's important to do when installing bearings? - Answer Not to touch the bearing surface
with your fingers
A scaffold must be designed and constructed to support at least how many times the load that
may be imposed of it? - Answer At least 4 the load that may be imposed of it
What WHMIS Class symbol has only a flame? - Answer Class B (Combustible Materials)
Grease is made up of approximately what percentage of oil? - Answer 70 - 90% oil
A bias ply tire on a heavy-duty vehicle is best suited for what type of application? - Answer
Low speed and lower load
What is the metric term for Energy? - Answer Joule
What is the problem in a manual transmission that is noisy under load in all reduction gears? -
Answer Cluster Shaft bearings is worn
, What is the possible cause for chattering on the cylinder rod and a noisy pump on a cushion ride
system? - Answer Loose connection on the oil inlet side of the pump
What is the cause of repeated low mileage U-joint failure? - Answer High Speed, high angel
operation
What is done to detect a leak on the primary side of a diesel engine fuel system? - Answer
Apply minimal pressure to fuel tank and checks lines for leaks with soap and water
What is done to test the pickup coil in an electronic ignition? - Answer Test coil at 60 Celsius
What will cause the steering wheel to rotate by itself on an articulating steering system? -
Answer Internal wear in the metering pump
The purpose of the fuel vapor return line is to return to the fuel tank any vapour? - Answer
develops in the fuel pump
What WHIMIS Class symbol has a Skull? - Answer D1 Class (Immediate and serious toxic
effects)
To check the slack adjuster you should? - Answer Park on level ground, place wheel chocks,
turn off parking brakes, and pull hard on each slack adjuster. It shouldn't move more then one
inch
How many seconds of space ahead of you should you be when driving a 100ft twin trailer
combination at 50 mph when the road is dry and the visibility is good? - Answer 11 seconds
What does DC stand for? - Answer Direct Current
What does AC stand for? - Answer Alternating Current
What is the MINIMUM Tensile strength for an E6010 electrode? - Answer 60,000 psi
(413,685 Kpa)
Same question on 24, but with AWS E7018 - Answer 70,000 psi (482,633 Kpa)
What does E stand for in SMAW Accessories? - Answer Electrode
