Stopping the Big Rigs - Quiz 2
A compressor is also referred to as:
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A motor
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An air pump
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An engine
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All the above
Many compressors on over-the-road vehicles are cooled by:
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Air flow
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Cooling fins
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Engine coolant
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All the above
What component turns the compressor on and off?
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The low air switch
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The ignition switch
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The governor
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Both A & B
The compressor discharge line should be checked for:
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Restrictions
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Kinks and bends
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Carbon build up
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All the above
What's the best way to prevent oil and water accumulation in the air system?
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Air filter
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An extra water trap
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Automatic drain valve
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Daily reservoir drains
What can contribute to excessive oil passage:
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Dirty or plugged air filters
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The engines intake starving the compressor
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Excessive crankcase pressures
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All the above
The Haldex pure air plus dryer does what?
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Filters, heats and condenses
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Cools, centrifuges and filters
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Filters and dries
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All the above
The isolation valve is used to:
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Prevent over charging of the air dryer
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Protect the air dryer from a failure in the compressor
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Prevents the loss of turbo boost pressure
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None of the above
Why is alcohol used in an air system?
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Lubrication
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Cleans the system of contaminants
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Reduces cold weather freeze-ups
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Both A & B
The supply tank is also referred to as the
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Second tank
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The wet tank
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The first tank
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Both B & C
A manual means of draining the supply tank is required by law.
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True
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False
The pop-off safety valve is preset to:
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Cut-out pressure
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10 psi over cut-out pressure
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150 psi
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None of the above
The low air switch operates when the system:
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Drops below the cut-in pressure
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Is at 80 psi
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Drops below 60 psi
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None of the above
During air compressor cut-out, the governer allows wet tank air to be routed to the unloader mechanism in the compressor to:
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Open the exhaust
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Open the intake valves
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Close the discharge
Most governors are set to cut-out at:
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150 psi
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105 psi
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120 psi