During （）, the starting air valves should be closed to prevent the engine from turning.

[单选题]During the inspection, the starting air valves should be closed （） the engine from turning.A . to increaseB . to speed upC . to preventD . to reduce

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

[单选题]The total starting air capacity required for reversible main engines is to be sufficient for at least （）.A . six consecutive startsB . eight consecutive startsC . ten consecutive startsD . twelve consecutive start

[单选题]When the starting air valve closes on one cylinder, another starting air valve has （） opened on another cylinder whose piston has just commenced its downward stroke.A . justB . nearlyC . merelyD . already

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

[单选题]The starting air system usually has （） to prevent starting if anything is not in order.A . stop valvesB . interlocksC . non-return valvesD . air vent

[单选题]The purpose of the safety relief valves installed on an auxiliary boiler is to （）.A . relieve excess fuel oil pressure during the “off” fire cycleB . admit water to the dry pipeC . throttle the forced draft fan output for proper combustio

[单选题]Temperature control valves installed in the jacket cooling water system of a diesel engine modulates the rate of water flow through the （）.A . cooling water pumpB . nozzle cooling passagesC . cylinder jacketsD . heat exchanger

[单选题]The intake valves in a diesel engine are reseated by （）.A . cam followersB . push rodsC . combustion gasesD . valve spring

[单选题]JohnDeweybelievedthateducationshouldbeapreparationforlife,thatapersonlearnsbydoing,andthatteachingmust________thecuriosityandcreativityofchildren.A．)seekB)stimulateC)shapeD)secure