The Air Waybill is the most important document for a bach of air cargo transportation. It serves as( )

A:receipt and delivery of shipment B:evidence of contract of air cargo transportation C:customs declaration D:document of title

_____ supplies pilot air to control the cylinder air start valves.

A:An air compressor B:An indicator cock C:An air distributor D:A safety valve

Compressed air is supplied by air compression to _____.

A:the air receivers B:the starting valves C:the cylinder covers D:the distributors

If the engine does start on air, but combustion does not immediately begin, the cause may be _____.

A:failure of the fuel pumps B:starting air pressure too low C:stop valve in air line closed D:the turning gear still engaged

Which cause of the following can lead to the engine not to start on air?

A:starting air pressure too high B:correct timing of starting air valves C:three of the starting valves stuck D:the turning gear disengaged

The purpose of an air compressor unloading device is to _____.

A:drain water from the air receiver B:drain water from the cylinders C:delay the compression process until the motor is up to speed D:check pump alignment

An un-loader is installed on an air compressor to _____.

A:bypass the high pressure stage to the low pressure stage on 100% of the air compressorsin service B:prevent excessive inter-stage pressure buildup C:control compressor discharge pressure D:remove all but the frictional load during starting

Broken valve strips in an operating low pressure, air compressor will cause _____.

A:an immediate crankcase explosion B:oil contamination in the compressed air C:a decrease in compressor capacity D:no immediate loss of the compressed air capacity

The timing of diesel engine air starting valves is controlled by__________.

A:the air start valve timing gears and rods B:a cylinder check valve C:individual cams and valve gear D:an air manifold poppet valve

Which of following functions is not one of the functions of air conditioner?

A:refreshing the air B:making person upset C:adjusting the air humidity D:adjusting the air temperature