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单选题
A pumproom is suspected of accumulating gases after a ventilation machinery breakdown. Where should the combustible gas indicator case be placed when testing the pumproom atmosphere for combustible gases? （）
A
In the lower level of the pumproom
B
In the middle level of the pumproom
C
In the upper level of the pumproom
D
On the deck outside the pumproom
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更多 “单选题A pumproom is suspected of accumulating gases after a ventilation machinery breakdown. Where should the combustible gas indicator case be placed when testing the pumproom atmosphere for combustible gases? （）A In the lower level of the pumproomB In the middle level of the pumproomC In the upper level of the pumproomD On the deck outside the pumproom” 相关考题
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A.suspected;doubt
B.doubted;suspect
C.doubted;doubt
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共用题干
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共用题干
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考题
单选题Lube oil accumulating in the cooling water system of a diesel engine will result in （）A
lube cooler failureB
poor heat transferC
mechanical lubricator failureD
camshaft seizure
考题
单选题A combustible gas indicator is used to determine （）.A
if there is sufficient oxygen to support lifeB
the toxicity of flammable gases or vaporsC
the amount ofCO2 present in flue gasD
the presence of flammable gases or vapors in the air
考题
单选题In the operation of a flash type evaporator equipped with air ejectors,the air and non- condensable gases are evacuated directly from the （）.A
first stage flash chamberB
second stage flash chamberC
first stage after condenserD
second stage distilling condenser
考题
单选题"Scavenging" on a diesel engine means （）.A
injecting fuel oil into a cylinderB
removing exhaust gases from the cylinderC
forcing air into the cylinders under pressure after the exhaust valve has dosedD
a combination of all the above
考题
单选题Why will a two stage flash type distilling plant tend to operate more efficiently when operating in cold seawater?（）A
The colder seawater passing through the condenser tube bundles of the various stages increases evaporator vacuumB
The amount of heated feed water discharged from the feed water heater after cndenser is increasedC
Fewer non-condensable gases are created by the flow of colder seawaterD
More seawater is allowed to pass through the flint stage overflow weir
考题
单选题Fins are installed on the fireside of water-tubes used in waste boiler to（）A
decrease the velocity of gases flowing past the tubesB
increase the rate of heat transferC
reduce accumulations carbon depositsD
direct the flow of gases
考题
单选题The blower type crankcase ventilation system （）A
removes combustible gases in the crankcaseB
prevents the formation of combustible gases in the crankcaseC
cools lubricating oilD
improves cold weather starting
考题
单选题The transfer procedures for oil products are required to be posted （）.A
in the pilothouseB
in the officer's loungeC
in the upper pumproom flatD
where they can be easily seen or readily available
考题
单选题A purge recovery system is used in a centrifugal air conditioning or refrigeration system to （）A
purge lube oil from the liquid refrigerantB
recover water purged from the systemC
separate foul gases from the receiverD
purge non-condensable gases without losing refrigerant
考题
单选题A fire in a ballast pumproom can be brought under control with minimal impact on stability by（）.A
cooling the outside bulkheads with waterB
shutting all sources of air into the compartmentC
closing the sea chestD
flooding the compartment with salt water
考题
单选题The most likely location for a liquid cargo fire to occur on a tanker would be（）.A
in the midships houseB
at the main deck manifoldC
at the vent headerD
in the pumproom
考题
单选题An oxygen indicator can be used to determine if there is（）.A
sufficient oxygen in a compartment to support lifeB
combustible gases presentC
hydrogen gases presentD
All of the above
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