Charging-air pressure increases if there is incorrect combustion and drop in the （） of the diesel engine.

[单选题]In the （） pressure charging system the pulse of energy that occur as the exhaust is released from the cylinder to improve the output of the turbocharger.A . constantB . pulseC . highD . none of the above

[单选题]The pressure of pilot air is usually （） than that of starting air.A . higherB . lowerC . lowD . high

[单选题]Suppose inflation increases due to increases in government spending and a r

[单选题]Charging is the filling of the engine cylinder with a supply of （） for compression.A . waterB . fresh airC . fuel oilD . ga

[单选题]If the volatility of returns of an underlying security increases, then:A.Bo

[单选题]Exhaust temperature increases in all cylinders, the possible cause may be（）(1) increased scavenging air temperature(2) air in fuel pumps and fuel valves(3) fouling of air and gas passagesA . (1)+(2)B . (1)+(3)C . (2)+(3)D . (1)+(2)+(3)

[名词解释] 上充〔压水堆〕 charging

[单选题]Compressed air is supplied by air compression to （）.A . the air receiversB . the starting valvesC . the cylinder coversD . the distributor

[单选题]If the suction pressure at the refrigeration compressor is below normal, the cause can beA．refrigerant overchargeB．overfeeding by the expansion valveC．a restricted suction strainerD．due to short cycling of the compress

[单选题]If the head pressure of a reciprocating refrigeration compressor is excessiveA．the relief valve should open before the high pressure cutoutB．the relief valve should open and allow the excess refrigerant to flow to the receiverC．the high pressure cuto