Heavy Duty Mechanic – Fourth Year Study Guide (Advanced Diagnostics, Systems & Red Seal
Preparation)
On a vehicle equipped with a solid I-beam front axle, an incorrect camber could be caused by:
A) a bent spindle
B) a bent axle
C) both A and B - ✔✔C) both A and B
T or F - Water would be satisfactory extinguishing a fuel oil fire? - ✔✔False
Before extinguishing an electrical fire you should? - ✔✔Turn off power source
Dump truck boxes should be blocked in the raised position because:
A) they are unstable without a load.
B) a hydraulic component may let go and the box will fall.
C) the cylinder will not raise the box to a convenient working height.
D) all of the above - ✔✔B) a hydraulic component may "let go" and the box will fall
Chain sizes are measured by:
A) the diameter of the rod used to make the link.
B) the length of the chain. C) the length of the link.
D) the distance between the links - ✔✔A) the diameter of the rod used to make the link.
A stepped feler gauge is often called a:
A) bent blade feeler gauge. B) go-no-go gauge.
C) general use feeler gauge.
,D) ignition and spark plug gauge - ✔✔B) go-no-go gauge.
The size of a shackle is determined by:
A) the width of the box
B) the length of the bow
C) the diameter of the material in the bow
D) the diameter of the pin - ✔✔D) the diameter of the pin
When soldering electrical connections _____ core solder is used. - ✔✔Rosen
Copper tubing is measured on the _____. - ✔✔Outside
Pipe is measured on the ____. - ✔✔Inside Diameter
To determine the wrench size a bolt is measured:
A) across the shank
B) across the points on the head
C) across the flats of the head - ✔✔C) across the flats of the head
For general purpose work cutting lips of a drill should be ground to an included angle of:
A)136
B)118
C)180
D)145 - ✔✔B)118
Whats is the decimal equivalent of 3/8"? - ✔✔.375"
, What is the fractional equivalent of 0.625"? - ✔✔5/8"
One of the most effective ways to stop a run away diesel is to:
A) cut off the air supply to the engine
B) place a load on it
C) shut the fuel off at the tank
D) apply the brakes - ✔✔A) cut off the air supply to the engine
When parking a piece of machinery, set the parking brakes then safely:
A) stop the engine
B) fill the fuel tank
C) lower all attachments
D) check all lube oil levels - ✔✔C) lower all attachments
When starting fluid is being used it should be applied sparingly only:
A) before cranking
B) during cranking
C) when manifold heaters are operating
D) when the engine starts firing - ✔✔B) during cranking
A tapered roller bearing is suited for:
A) axial loads
B) radial loads
C) thrust loads
D) all of the above - ✔✔D) all of the above
Preparation)
On a vehicle equipped with a solid I-beam front axle, an incorrect camber could be caused by:
A) a bent spindle
B) a bent axle
C) both A and B - ✔✔C) both A and B
T or F - Water would be satisfactory extinguishing a fuel oil fire? - ✔✔False
Before extinguishing an electrical fire you should? - ✔✔Turn off power source
Dump truck boxes should be blocked in the raised position because:
A) they are unstable without a load.
B) a hydraulic component may let go and the box will fall.
C) the cylinder will not raise the box to a convenient working height.
D) all of the above - ✔✔B) a hydraulic component may "let go" and the box will fall
Chain sizes are measured by:
A) the diameter of the rod used to make the link.
B) the length of the chain. C) the length of the link.
D) the distance between the links - ✔✔A) the diameter of the rod used to make the link.
A stepped feler gauge is often called a:
A) bent blade feeler gauge. B) go-no-go gauge.
C) general use feeler gauge.
,D) ignition and spark plug gauge - ✔✔B) go-no-go gauge.
The size of a shackle is determined by:
A) the width of the box
B) the length of the bow
C) the diameter of the material in the bow
D) the diameter of the pin - ✔✔D) the diameter of the pin
When soldering electrical connections _____ core solder is used. - ✔✔Rosen
Copper tubing is measured on the _____. - ✔✔Outside
Pipe is measured on the ____. - ✔✔Inside Diameter
To determine the wrench size a bolt is measured:
A) across the shank
B) across the points on the head
C) across the flats of the head - ✔✔C) across the flats of the head
For general purpose work cutting lips of a drill should be ground to an included angle of:
A)136
B)118
C)180
D)145 - ✔✔B)118
Whats is the decimal equivalent of 3/8"? - ✔✔.375"
, What is the fractional equivalent of 0.625"? - ✔✔5/8"
One of the most effective ways to stop a run away diesel is to:
A) cut off the air supply to the engine
B) place a load on it
C) shut the fuel off at the tank
D) apply the brakes - ✔✔A) cut off the air supply to the engine
When parking a piece of machinery, set the parking brakes then safely:
A) stop the engine
B) fill the fuel tank
C) lower all attachments
D) check all lube oil levels - ✔✔C) lower all attachments
When starting fluid is being used it should be applied sparingly only:
A) before cranking
B) during cranking
C) when manifold heaters are operating
D) when the engine starts firing - ✔✔B) during cranking
A tapered roller bearing is suited for:
A) axial loads
B) radial loads
C) thrust loads
D) all of the above - ✔✔D) all of the above
