The four strokes are called suction, compression, expansion and exhaust, but only （） stroke provides the power to drive the ship.

[单选题]Four strokes consist of suction, compression, （） and exhaust stroke.A . combustionB . condensationC . chargingD . evaporatio

[单选题]In four strokes engine, the cycle of events is completed in four strokes of （）.A . the cylinderB . the crankshaftC . the pistonD . the cross-head

[单选题]I called you four times this morning but your line was always _____.A.occup

[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]During the suction stroke, the piston is moving （）.A . inwardsB . outwardsC . downwardsD . upward

[单选题]In the suction stroke air is induced into the cylinder （）In the compression stroke the air is compressed.A . by an fuel valveB . through an inlet valveC . with an exhaust valveD . from an outlet valve

[名词解释] Adms-Strokes综合征

[名词解释] Adams-Strokes综合征

[单选题]Lube oil pumps taking suction from the sump of most small marine engines are usually （）.A . of the diaphragm typeB . of the centrifugal typeC . of the positive displacement typeD . independently driven by electric motor

[单选题]关于Strokes定律说法正确的是A.沉降速率与微粒密度成正比B.沉降速率与分散介质成正比C.沉降速率与微粒粒径平方成正比D.沉降速率与分散介质黏度成