An air leak at point 'X' in the system shown above would cause which of these to leak down?

Air Brake System Quiz

Quiz
•
Professional Development
•
9th Grade
•
Hard
B P
FREE Resource
65 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
tank only
tank only
2 and 4 tanks only
the entire system
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
The slack adjuster shown above is being adjusted. Technician A says that travel 'X' should be as short as possible without dragging the brakes. Technician B says that angle 'Y' should be less than 90 degrees when the brakes are applied. Who is right?
Technician A only
Technician B only
Both A and B
Neither A or B
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Which of the following cannot cause a drum on an air-braked vehicle to overheat?
an over-tightened brake adjuster at that wheel
under-adjusted brake(s) elsewhere on the vehicle
too-high governor cut-out pressure
driving downhill in too high a gear
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
All the brakes drag on a school bus with hydraulic brakes. Which of the following could be the cause?
air in the hydraulic system
too high a vacuum supply to the power brake booster
a leaking secondary cup in the master cylinder
no brake pedal free travel
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Which of the following could cause a pulsating brake pedal on a school bus with hydraulic brakes?
zero brake pedal free travel
glazed linings
an out-of-round brake drum
a frozen wheel cylinder piston
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
In the 'AL' factor, the 'L' refers to the:
lining’s friction code
thickness of the lining
type of front-brake limiting valve
length of the slack adjuster
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Technician A says that linings worn too thin on an air-braked school bus can cause the S-cam shaft to roll over. Technician B says this condition can cause excess brake pedal travel. Who is right?
Technician A only
Technician B only
Both A and B
Neither A or B
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