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ASE S4 Brakes Exam Practice Questions and Answers CA$14.41   Add to cart
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ASE S4 Brakes Exam Practice Questions and Answers
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ASE S4 Brakes Exam Practice Questions and Answers The air system is maintained at what pressure? - Answer️️ -100 to 120 pounds per square inch. At what pressure does the low pressure switch activate? - Answer️️ -Below 60 pounds per square inch. A safety or pop off valve is usually inst...

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  • August 28, 2024
  • 13
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • ase s4 brakes exam practice questions and answers

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  • ASE

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©SOPHIABENNET@2024/2025 Wednesday, August 21, 2024 12:13 PM




ASE S4 Brakes Exam Practice Questions and Answers

The air system is maintained at what pressure? - Answer✔️✔️-100 to
120 pounds per square inch.

At what pressure does the low pressure switch activate? -
Answer✔️✔️-Below 60 pounds per square inch.

A safety or pop off valve is usually installed in which reservoir? -
Answer✔️✔️-In the one closest to the compressor.

Why is the Wet tank referred to as such? - Answer✔️✔️-It is the one
closest to the compressor and has the most water in it.

What is an after cooler used for in an air system? - Answer✔️✔️-It
condenses and eliminates most of the water from an air system.

What does an air drier do in a air system? - Answer✔️✔️-They
usually contain a bed of desiccant material which captures water
and oil.

What does the dual control foot valve control? - Answer✔️✔️-After the
wet tank the valve controls the primary and secondary systems.

In a normal operation what does the primary air brake system
control? - Answer✔️✔️-The rear axle brakes.

In a normal operation what does the secondary air brake system
control? - Answer✔️✔️-The front axle brakes.




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, ©SOPHIABENNET@2024/2025 Wednesday, August 21, 2024 12:13 PM




What does the two way check valve do in the air brake system? -
Answer✔️✔️-It allows dominant pressure to activate the stoplight
switch and to release the parking brakes.

What is the standard releases of the parking brake system in the
event of a failure? - Answer✔️✔️-At least once during a failure of
either primary or secondary system pressure.

Why are relay valves used in a rear air brake system? - Answer✔️✔️-
To minimize delay of brake application on long wheel based
applications.

What determines the crack pressures on a air brake system relay
valve? - Answer✔️✔️-How heavily loaded the axle is. The size of the
axle's brakes. Aggressiveness of the linings.

What is a quick release valve used for in air brake systems? -
Answer✔️✔️-It allows brake actuation air to be quickly exhausted
near the brakes it serves.

What is the minimum apply time of air brake systems? -
Answer✔️✔️-0.45 seconds.

What is the minimum release time of air brake systems? -
Answer✔️✔️-0.55 seconds.

What is a ratio valve in air brake systems? - Answer✔️✔️-Also known
as a pressure reducing valve, limits air pressure to the front axle.
They have a variety of hold off pressures.



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