In a （） engine the charge of air in the cylinder before compression commences is above atmospheric pressure.

[单选题]A charge of fresh air is drawn into the engine cylinder and then （） by the moving piston（） very high pressure.A . pressed；toB . pressurized；withC . pushed；inD . compressed；to

[单选题]If the engine does not start on air, it may be due toA．low compression of the fuel pumpsB．incorrect timing of fuel pumpsC．the starting air valves stuckD．air-locks in fuel oil pipeline

[单选题]If the engine does not start on air, it may be due to （）A . low compression of the fuel pumpsB . incorrect timing of fuel pumpsC . the starting air valves stuckD . air-locks in fuel oil pipeline

[单选题]If the engine does start on air, but combustion does not immediately begin, the cause may be _____.A．failure of the fuel pumpsB．starting air pressure too lowC．stop valve in air line closedD．the turning gear still engaged

[单选题]B．efore starting the engine, the air bottle should be ____.A．pumped upB．loadedC．dischargedD．closed

[单选题]An indication of a diesel engine air intake being partially clogged, is （）.A . low firing pressure and low exhaust temperaturesB . low firing pressure and normal exhaust temperaturesC . high firing pressure and low exhaust temperaturesD . high firing

[单选题]In an engine with air inlet valve and exhaust valve on its cylinder heads the fresh air will enter into the cylinder （） and the gases exhaust （）, there being an adequate overlap between the inlet opening and the exhaust closing.A . downwards；upwardsB

[单选题]Before starting the engine the air bottle should be （）.A . pumped upB . loadedC . dischargedD . opened

[单选题]If the engine does start on air, but combustion does not immediately begin, the cause may not be （）.A . low compressionB . failure of the fuel pump to discharge fuelC . incorrect timing of fuel pumpD . turning gear being still o

[单选题]The officer in charge of the engineering watch shall notify the chief engineer without delay ____.A．in any emergency or if in any doubt as to what decision or measures to takeB．in the event of any impending action in machinery spaces that may cause r