Heavy Duty Technician Practice Exam Newest
2026 Questions and Correct Detailed Answers
Already Graded A+
What is the cause of repeated low mileage U-joint failure? - CORRECT
ANSWER-High Speed, high angel operation
What is done to detect a leak on the primary side of a diesel engine fuel system? -
CORRECT 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? - CORRECT
ANSWER-Test coil at 60 Celsius
What will cause the steering wheel to rotate by itself on an articulating steering
system? - CORRECT ANSWER-Internal wear in the metering pump
The purpose of the fuel vapor return line is to return to the fuel tank any vapour?
- CORRECT ANSWER-develops in the fuel pump
,What WHIMIS Class symbol has a Skull? - CORRECT ANSWER-D1 Class
(Immediate and serious toxic effects)
When installing camshaft gears where is it critical that the timing marks will be? -
CORRECT 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? - CORRECT ANSWER-If it has a deflection of 0.50 of an
inch
What is the pitch of a metric micrometer? - CORRECT 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? - CORRECT ANSWER-70 - 80%
What are system and circuit relief valves commonly installed in heavy equipment -
CORRECT ANSWER-Commonly installed in the Directional Control Valve
What's important to do when installing bearings? - CORRECT 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? - CORRECT ANSWER-At least 4 the load
that may be imposed of it
What WHMIS Class symbol has only a flame? - CORRECT ANSWER-Class B
(Combustible Materials)
Grease is made up of approximately what percentage of oil? - CORRECT
ANSWER-70 - 90% oil
A bias ply tire on a heavy-duty vehicle is best suited for what type of application? -
CORRECT ANSWER-Low speed and lower load
What is the metric term for Energy? - CORRECT ANSWER-Joule
What is the problem in a manual transmission that is noisy under load in all
reduction gears? - CORRECT 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? - CORRECT ANSWER-Loose connection on the oil inlet
side of the pump
2026 Questions and Correct Detailed Answers
Already Graded A+
What is the cause of repeated low mileage U-joint failure? - CORRECT
ANSWER-High Speed, high angel operation
What is done to detect a leak on the primary side of a diesel engine fuel system? -
CORRECT 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? - CORRECT
ANSWER-Test coil at 60 Celsius
What will cause the steering wheel to rotate by itself on an articulating steering
system? - CORRECT ANSWER-Internal wear in the metering pump
The purpose of the fuel vapor return line is to return to the fuel tank any vapour?
- CORRECT ANSWER-develops in the fuel pump
,What WHIMIS Class symbol has a Skull? - CORRECT ANSWER-D1 Class
(Immediate and serious toxic effects)
When installing camshaft gears where is it critical that the timing marks will be? -
CORRECT 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? - CORRECT ANSWER-If it has a deflection of 0.50 of an
inch
What is the pitch of a metric micrometer? - CORRECT 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? - CORRECT ANSWER-70 - 80%
What are system and circuit relief valves commonly installed in heavy equipment -
CORRECT ANSWER-Commonly installed in the Directional Control Valve
What's important to do when installing bearings? - CORRECT 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? - CORRECT ANSWER-At least 4 the load
that may be imposed of it
What WHMIS Class symbol has only a flame? - CORRECT ANSWER-Class B
(Combustible Materials)
Grease is made up of approximately what percentage of oil? - CORRECT
ANSWER-70 - 90% oil
A bias ply tire on a heavy-duty vehicle is best suited for what type of application? -
CORRECT ANSWER-Low speed and lower load
What is the metric term for Energy? - CORRECT ANSWER-Joule
What is the problem in a manual transmission that is noisy under load in all
reduction gears? - CORRECT 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? - CORRECT ANSWER-Loose connection on the oil inlet
side of the pump
