更多"An explosion is a sudden increase i"的相关试题:
[单项选择]When a sudden increase in steam demand occurs from the boiler, the water level in the drum at the higher pressure will（）
A. rise quickly
B. rise slowly
C. drop quickly
D. drop slowly
[单项选择]When a sudden increase in steam demand comes to normal, the drum pressure will and water level in the drum will（）.
A. rise, rise also
B. rise, drop
C. drop, rise
D. drop, drop also
[单项选择]（）there danger of explosion?
A. Is
B. Has
C. If
D. Do
[单项选择]A firebox explosion in an automatically fired auxiliary boiler may be the result of （）
A. excessive purging before lighting off
B. insufficient trail for ignition period
C. a faulty transformer in the ignition circuit
D. insufficient purging before lighting off
[单项选择]The sudden reduction of pressure occurring within the crankcase of a refrigeration compressor during starting causes the （）.
A. sudden evaporation of wax crystals in the lubricant
B. sudden evaporation of entrapped air in the lubricant
C. release of refrigerant from the oil/refrigerant mixture
D. release of dissolved lubricant from the refrigerant
[单项选择]After an explosion，repair of emergency machinery and services should be accomplished（）.
A. after control of fire，flooding，and structural repairs
B. immediately，before the emergency is under control
C. after control of fire，but before control of flooding
D. after stability is restored
[单项选择]If a crankcase explosion occurs in a diesel engine, which of the listed actions should be taken?（）
A. Open the crankcase immediately to check for damage
B. Apply fire fighting water through the crankcase breather
C. Allow the engine to cool before opening the crankcase
D. Assume that there is no damage to the crankshaft
[单项选择]If a crankcase explosion has occurred in a diesel engine, and the crankcase remains intact, which of following precautions should be observed?（）
A. The cylinder indicator cocks should be opened
B. The sump lube oil scavenge pump should be secured immediately
C. The explosion relief valves should be manually opened
D. The crankcase should remain unopened until the engine has cooled
[单项选择]A sudden drop in diesel engine cylinder compression pressure can be caused by（）
A. a leaking fuel injector nozzle
B. a clogged air filter
C. excessively early fuel injection
D. malfunctioning valves
[名词解释] 冠状动脉性猝死（sudden coronary death）
[单项选择]A sudden drop in compression pressure in one cylinder of a diesel engine can be caused by（）
A. a leaking fuel injector nozzle
B. a clogged air filter
C. excessively early fuel injection
D. malfunctioning valves
[单项选择]A diesel engine experiences a sudden loss in speed, accompanied by black exhaust smoke, with the fuel rack at maximum, and speed remaining below normal the probable（）
A. engine overload
B. leaky valves
C. stuck or broken piston rings
D. low air injection pressure
[单项选择]A sudden power loss from a turbocharged and after-cooled diesel engine is an indication of a/an（）
A. turbocharger malfunction or failure
B. crankcase exhauster overload
C. overload on the intercooler
D. obstruction in the engine cylinders
[单项选择]A sudden decrease in the diesel engine lube oil viscosity could be an indication of（）
A. loss of additives from the lube oil
B. carbon deposits in the lube oil
C. excessive centrifuging
D. excessive fuel dilution
[单项选择]If a vessel takes a sudden severe list or trim from an unknown cause, you should first（）.
A. determine the cause before taking countermeasures
B. assume the shift is due to off-center loading
C. counterflood on the side opposite the list or trim
D. assume the cause is environment forces
[单项选择]If the cause of a sudden severe list is negative initial stability，counterflooding into empty tanks may（）.
A. increase the righting moment
B. cause an increase in the righting arm
C. bring the vessel to an upright equilibrium position
D. cause the vessel to flop to a greater angle
[单项选择]Sudden starts or stops of the boom is likely to cause all of the following except（）.
A. breaking a cargo runner
B. parting guys topping lifts
C. carrying away a block
D. overheating the resistors and eventually burning out
[单项选择]Sudden unloading of a diesel engine can cause（）.
A. decreased fuel efficiency
B. increased exhaust temperature
C. black smoke
D. overspeed trip
