A . the cylinder cover is cracked
B . the injector holes is clogged
C . the cams are not properly set
D . fuel pump is leaking
[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]Bottom blow valves are installed on auxiliary water-tube boilers to （）A . remove suspended and precipitated solids from the boiler waterB . completely drain the boiler in an emergency situationC . prevent hardened scale deposits in the water drumD .
[单选题]D．iesel engine blow-by is the leakage of combustion gases past the( ).A．oil rings onlyB．compression and scraper ringsC．cylinder liner sealingD．cylinder liner ring grooves
[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
[试题](ii) Explain, with reasons, the relief available in respect of the fall in value of the shares in All Over plc,identify the years in which it can be claimed and state the time limit for submitting the claim.(3 marks)
[单选题]The closing of the exhaust valves used on a modern, large, low-speed, main propulsion diesel engine may be directly provided by_______.A．large conical springsB．compressed air pressureC．hydraulic pressureD．exhaust gas pressure
[主观题]why is quick closing valves important to in engine room machineries ?how are they operated ?
[单选题]During （）, the starting air valves should be closed to prevent the engine from turning.A . overhaulB . runningC . blowing downD . All of the above are correct