310T- Air System and Brakes exam with ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
correct answers ||\\||\\
1. What will cause air to leak out of the relay valve with the park
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brake released and the
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service brake not applied? ||\\||\\ ||\\||\\ ||\\||\\
a. Ruptured service brake diaphragm.
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b. Ruptured Park/Emergency brake diaphragm.
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c. Faulty secondary reservoir blow-off valve.
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d. Parking/Emergency brake chamber pushrod seal leak. -
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correct answers✔✔d. Parking/Emergency brake chamber ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
pushrod seal leak. ||\\||\\ ||\\||\\
2. What will cause the wet tank air pressure to leak down
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
overnight?
a. A faulty air governor valve.
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b. A faulty one way check valve.
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c. A faulty service brake diaphragm.
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d. A leak in the air compressor outlet line. - correct
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answers✔✔b. A faulty one way check valve. ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
, 3. What is indicated by excessive air reservoir build up time?
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a. A plugged air drier.
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b. Air governor set too low.
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c. A leaking service relay valve.
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d. A restricted compressor air inlet. - correct answers✔✔d. A
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restricted compressor air inlet. ||\\||\\ ||\\||\\ ||\\||\\
4. What will cause engine coolant to be present in the air system
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tanks?
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a. Cracked intercooler.
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b. Leaking engine head gasket.
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c. Plugged air drier desiccant.
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d. Air compressor head gasket. - correct answers✔✔d. Air
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compressor head gasket. ||\\||\\ ||\\||\\
5. What will cause excessive air pressure drop during a brake
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application?
a. Brakes adjusted to tight.
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b. Excessive pushrod travel.
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correct answers ||\\||\\
1. What will cause air to leak out of the relay valve with the park
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
brake released and the
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
service brake not applied? ||\\||\\ ||\\||\\ ||\\||\\
a. Ruptured service brake diaphragm.
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
b. Ruptured Park/Emergency brake diaphragm.
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
c. Faulty secondary reservoir blow-off valve.
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d. Parking/Emergency brake chamber pushrod seal leak. -
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
correct answers✔✔d. Parking/Emergency brake chamber ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
pushrod seal leak. ||\\||\\ ||\\||\\
2. What will cause the wet tank air pressure to leak down
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
overnight?
a. A faulty air governor valve.
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
b. A faulty one way check valve.
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
c. A faulty service brake diaphragm.
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d. A leak in the air compressor outlet line. - correct
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
answers✔✔b. A faulty one way check valve. ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
, 3. What is indicated by excessive air reservoir build up time?
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
a. A plugged air drier.
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
b. Air governor set too low.
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
c. A leaking service relay valve.
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
d. A restricted compressor air inlet. - correct answers✔✔d. A
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
restricted compressor air inlet. ||\\||\\ ||\\||\\ ||\\||\\
4. What will cause engine coolant to be present in the air system
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
tanks?
||\\||\\
a. Cracked intercooler.
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b. Leaking engine head gasket.
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
c. Plugged air drier desiccant.
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
d. Air compressor head gasket. - correct answers✔✔d. Air
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
compressor head gasket. ||\\||\\ ||\\||\\
5. What will cause excessive air pressure drop during a brake
||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\ ||\\||\\
application?
a. Brakes adjusted to tight.
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b. Excessive pushrod travel.
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