Heavy Duty Technician – Comprehensive Practice Exam (Level 1 & 2 Review Test)
When installing camshaft gears where is it critical that the timing marks will be? - ANS ✔✔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? - ANS ✔✔If it has a deflection of 0.50 of an inch
What is the pitch of a metric micrometer? - ANS ✔✔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? - ANS ✔✔70 - 80%
What are system and circuit relief valves commonly installed in heavy equipment - ANS
✔✔Commonly installed in the Directional Control Valve
What's important to do when installing bearings? - ANS ✔✔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? - ANS ✔✔At least 4 the load that may be imposed of it
What WHMIS Class symbol has only a flame? - ANS ✔✔Class B (Combustible Materials)
Grease is made up of approximately what percentage of oil? - ANS ✔✔70 - 90% oil
A bias ply tire on a heavy-duty vehicle is best suited for what type of application? - ANS ✔✔Low
speed and lower load
,What is the metric term for Energy? - ANS ✔✔Joule
What is the problem in a manual transmission that is noisy under load in all reduction gears? -
ANS ✔✔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? - ANS ✔✔Loose connection on the oil inlet side of the pump
What is the cause of repeated low mileage U-joint failure? - ANS ✔✔High Speed, high angel
operation
What is done to detect a leak on the primary side of a diesel engine fuel system? - ANS
✔✔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? - ANS ✔✔Test coil at 60 Celsius
What will cause the steering wheel to rotate by itself on an articulating steering system? - ANS
✔✔Internal wear in the metering pump
The purpose of the fuel vapor return line is to return to the fuel tank any vapour? - ANS
✔✔develops in the fuel pump
What WHIMIS Class symbol has a Skull? - ANS ✔✔D1 Class (Immediate and serious toxic effects)
To check the slack adjuster you should? - ANS ✔✔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? - ANS ✔✔11 seconds
What does DC stand for? - ANS ✔✔Direct Current
What does AC stand for? - ANS ✔✔Alternating Current
What is the MINIMUM Tensile strength for an E6010 electrode? - ANS ✔✔60,000 psi (413,685
Kpa)
Same question on 24, but with AWS E7018 - ANS ✔✔70,000 psi (482,633 Kpa)
What does E stand for in SMAW Accessories? - ANS ✔✔Electrode
What is the most Mig wiring can be available in what four sizes? - ANS ✔✔0.024 in (0.6 mm),
0.030 in (0.8 mm), 0.035 (0.9 mm), or 0.045 in (1.2 mm)
What is the first thing to do, before using a piece of lifting equipment? - ANS ✔✔Check to see if
test certificate is within the prescribed time limit
T or F: Wire rope won't conduct electricity - ANS ✔✔False
Fixed resisters are designed for and made of? - ANS ✔✔Conduct either heavy or light amounts
of current and are wire-round (power) resistors made from resistive nickel/chrome wire
Stepped resistors are commonly used for? - ANS ✔✔Blower motor speed control circuit
When installing camshaft gears where is it critical that the timing marks will be? - ANS ✔✔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? - ANS ✔✔If it has a deflection of 0.50 of an inch
What is the pitch of a metric micrometer? - ANS ✔✔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? - ANS ✔✔70 - 80%
What are system and circuit relief valves commonly installed in heavy equipment - ANS
✔✔Commonly installed in the Directional Control Valve
What's important to do when installing bearings? - ANS ✔✔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? - ANS ✔✔At least 4 the load that may be imposed of it
What WHMIS Class symbol has only a flame? - ANS ✔✔Class B (Combustible Materials)
Grease is made up of approximately what percentage of oil? - ANS ✔✔70 - 90% oil
A bias ply tire on a heavy-duty vehicle is best suited for what type of application? - ANS ✔✔Low
speed and lower load
,What is the metric term for Energy? - ANS ✔✔Joule
What is the problem in a manual transmission that is noisy under load in all reduction gears? -
ANS ✔✔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? - ANS ✔✔Loose connection on the oil inlet side of the pump
What is the cause of repeated low mileage U-joint failure? - ANS ✔✔High Speed, high angel
operation
What is done to detect a leak on the primary side of a diesel engine fuel system? - ANS
✔✔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? - ANS ✔✔Test coil at 60 Celsius
What will cause the steering wheel to rotate by itself on an articulating steering system? - ANS
✔✔Internal wear in the metering pump
The purpose of the fuel vapor return line is to return to the fuel tank any vapour? - ANS
✔✔develops in the fuel pump
What WHIMIS Class symbol has a Skull? - ANS ✔✔D1 Class (Immediate and serious toxic effects)
To check the slack adjuster you should? - ANS ✔✔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? - ANS ✔✔11 seconds
What does DC stand for? - ANS ✔✔Direct Current
What does AC stand for? - ANS ✔✔Alternating Current
What is the MINIMUM Tensile strength for an E6010 electrode? - ANS ✔✔60,000 psi (413,685
Kpa)
Same question on 24, but with AWS E7018 - ANS ✔✔70,000 psi (482,633 Kpa)
What does E stand for in SMAW Accessories? - ANS ✔✔Electrode
What is the most Mig wiring can be available in what four sizes? - ANS ✔✔0.024 in (0.6 mm),
0.030 in (0.8 mm), 0.035 (0.9 mm), or 0.045 in (1.2 mm)
What is the first thing to do, before using a piece of lifting equipment? - ANS ✔✔Check to see if
test certificate is within the prescribed time limit
T or F: Wire rope won't conduct electricity - ANS ✔✔False
Fixed resisters are designed for and made of? - ANS ✔✔Conduct either heavy or light amounts
of current and are wire-round (power) resistors made from resistive nickel/chrome wire
Stepped resistors are commonly used for? - ANS ✔✔Blower motor speed control circuit
