(piston area)×(piston stroke)×(numbers of the cylinders)=engine( ).

A．brake horsepower

B．displacement

C．cylinder volume

D．cylinder clearance

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

[单选题]英语PISTON指（）A .活塞B .开关C .按钮D .弹簧

[单选题]As to the piston cooling, of the following, which statement is not true?（）A . Because the piston is exposed to very high temperature, it must be cooledB . The lower the piston cooling temperature is, the better it isC . Both water and lube oil can be

[单选题]The piston rings are manufactured with a diameter （） the bore of the cylinder.A . larger thanB . smaller thanC . equal toD . none of the above

[单选题]The lowest ring of a piston is （）.A . a coil springB . a sealing ringC . an oil distributor ringD . main seal ring

[单选题]The lower section of a piston is called the （）.A . landB . skirtC . crownD . plate

[单选题]Telescopic pipes to the piston of a large slow-speed main propulsion diesel engine are designed to prevent （）.A . excessive crankcase pressureB . excessive lube oil temperatureC . contamination of the lube oil by waterD . contamination of the cooling

[单选题]While engine is in operation the piston moves up and down, thus causing the rotation of the （）.A . crankcaseB . slipperC . cam housingD . crankshaft

[单选题]The position of the piston parts in relation to each other is secured by means of （） and a dowel pin in the crown.A . bossesB . through boltsC . machine-turned recessesD . long stud

[单选题]The cooling of the piston is carried out by circulating （） across the underside of the crown and inside the ring belt or through specially shaped passages.A . sea waterB . scavenging airC . lubricating oilD . fuel oil