33.When the exhaust ports or valves are opened, the begin to exhaust.(A)carbon and water (B)refriger
34.The lubricating oil of cylinder in a diesel engine usually contains additives with a highdegree o
35.What is the minimum number of the cylinders required for a two-stroke engine to ensurethat the en
37.Each revolution of which component can make one thermodynamic cycle for a two-strokeengine? (A)fu
38.Which officer must sign each page of the oil-record book?(A)engineer on watch (B)chief engineer (
39.What device is generally designed to avoid the exposure of fire to the air and to put out thefire
40.Which device is used to tighten and seal a hose onto a fitting?(A)screw (B)socket wrench (C)washe
6.What is used to measure the clearance of main bearing?(A)Pressure gauge (B)Dial gauge (C)Bridge ga
7.Generating tubes in waste heat boilers are beneficial to .(A)reduce gas flow turbulence (B)prevent
8.At least cylinders in a four-stroke engine are required in order to ensure that the engine can bes