190105E Back test

Question 1

Properly adjusted compressor drive belt will have maximum deflection of?
a) 1/4 to 1/2 inch
b) 1/2 to 3/4 inch
c) 3/4 to 1 inch
d) 1 to 1 1/4

Answer 1

1/2 to 3/4 inch

Question 2

If you discover excessive oil when draining the air reservoirs, the problem is likely
a) faulty air dryer
b) faulty governor
c) leaking compressor discharge valves
d) worn air compressor piston rings and cylinders

Answer 2

d) worn air compressor piston rings and cylinders

Question 3

CVIP specifications state that vehicle could be put out of service if the brake chamber pushrod travel does not fall between?

DEPENDS ON DIAPHRAGM SIZE

Answer 3

DEPENDS ON DIAPHRAGM SIZE

Question 4

When performing the air brake system governor cut-out, pressure warning and pressure buildup test, you found that the low pressure warning device went off at 70 psi. This means that the operation of the device is?

a) acceptable
b) is going off at a pressure too high
c) is going off at a pressure that is too low
d)none of the above

Answer 4

a) acceptable

Question 5

You are testing a vehicle with a governor cut-out pressure of 120psi and find that the governor cut in pressure is 90 psi. The problem is?

a) a worn compressor
b) misadjusted governor
c) faulty governor
d) faulty safety valve

Answer 5

c) faulty governor

Question 6

You are checking for supply circuit leakage in a tandem gravel truck that is towing a pup trailer. The primary reservoir pressure drops 4psi and the secondary reservoir drops 10 psi over a 2 minute period. you should conclude that?

a) the rate of leakage is acceptable
b) primary leakage is acceptable but secondary leakage is excessive
c) primary leakage is excessive but secondary leakage is acceptable
d) both primary and secondary leakage are excessive

Answer 6

b) primary leakage is acceptable but secondary leakage is excessive

Question 7

A body-loaded truck showed a pressure drop if 6 psi in the primary reservoir and 2 psi in the secondary reservoir when the service delivery circuit was tested for leakage. you conclude that?

a) the rate of leakage is acceptable
b) primary leakage is acceptable but secondary leakage is excessive
c) primary leakage is excessive but secondary leakage is acceptable
d) both primary and secondary leakage are excessive

Answer 7

c) primary leakage is excessive but secondary leakage is acceptable

Question 8

The angle formed between the brake chamber pushrod and the slack adjuster arm when the brakes are applied should be?

a) 90*
b) 120*
c) never greater then 90*
d) never less the n 90*

Answer 8

d) never less the n 90*

Question 9

When performing an automatic emergency brake circuit test, you found that the primary air reservoir pressure dropped when the secondary air reservoir was drained. The most probable cause of this fault would be a leak in the?

a) supply reservoir
b) safety valve
c) check valve in the primary reservoir
d) check valve in the secondary reservoir

Answer 9

c) check valve in the primary reservoir

Question 10

Before you back off the brakes on unite that have automatic slack adjusters, you must be sure to.

a) remove the clevis pin
b) remove or disengage the adjustment pawl
c)loosen the clevis jam nut
d)depress the locking sleeve

Answer 10

b) remove or disengage the adjustment pawl

Question 11

Camshaft axial play should not exceed
a) 0.030
b) 0.040
c) 0.075
d) 0.085

Answer 11

a) 0.030

Question 12

Alberta CVIP states that an air brake equipped vehicle will be put out of service if the brake linings are worn below?

a) 1/8 inch
b) 1/4”
c) 5/16”
d)3/4”

Answer 12

c) 5/16”

Question 13

If the angle between the brake camber and pushrod and slack adjuster arm is incorrect, you must?

a) adjust the slack adjuster
b) replace the slack adjuster
c) adjust the brake chamber clevis
d) replace the brake chamber

Answer 13

c) adjust the brake chamber clevis