310T- Air System and Brakes exam |\ |\ |\ |\ |\ |\
with 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?
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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
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pushrod seal leak. |\ |\
2. What will cause the wet tank air pressure to leak down
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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 ANSWERS
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✔✔b. A faulty one way check valve.
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, 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.
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4. What will cause engine coolant to be present in the air system
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tanks?
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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c. Air governor cut out set too low.
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d. Service tank relief valve leaking. - CORRECT ANSWERS ✔✔b.
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Excessive pushrod travel. |\ |\
with 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.
|\ |\ |\ |\ |\
d. Parking/Emergency brake chamber pushrod seal leak. -
|\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔d. Parking/Emergency brake chamber
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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.
|\ |\ |\ |\ |\
d. A leak in the air compressor outlet line. - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔b. A faulty one way check valve.
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, 3. What is indicated by excessive air reservoir build up time?
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a. A plugged air drier.
|\ |\ |\ |\
b. Air governor set too low.
|\ |\ |\ |\ |\
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
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
tanks?
a. Cracked intercooler.
|\ |\
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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c. Air governor cut out set too low.
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d. Service tank relief valve leaking. - CORRECT ANSWERS ✔✔b.
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Excessive pushrod travel. |\ |\
