更多"Before doing maintenance on electri"的相关试题:
[名词解释]电气设备（electrical equipment）
[单项选择]A fire in electrical equipment should be extinguished by using（）.
A. salt water
B. foam
C. low-velocity fog
D. CO2
[单项选择]The fire of electrical equipment is classified as（）fire.
A. class A
B. Class B
C. Class C
D. Class D
[单项选择]When electrical equipment is involved in a fire，the stream of dry chemicals should be（）.
A. aimed at the source of the flames
B. fogged above the equipment
C. shot off a flat surface onto the flames
D. used to shield against electrical shock
[单项选择]Complete maintenance of electrical motors should include periodic checks for machine （）
A. vibration
B. watertight integrity
C. speed droop
D. reactive power
[单项选择]Before doing any work on a hydraulic system equipped with accumulators, you should（）
A. drain the accumulators and purge with oxygen
B. bleed off all stored energy from the accumulators completely
C. charge the accumulators to prevent system energy loss
D. pump the hydraulic fluid into the accumulators to prevent fluid loss
[单项选择]Before any work on electrical or electronic equipment is performed, which of the following precautions should be carried out （）
A. De-energize the applicable switchboard bus
B. Bypass the interlocks
C. Secure and tag the supply circuit breaker in the open position
D. Station a man at the circuit supply switch
[单项选择]If you （） the equipment more carefully before sail, we （） so much trouble now.
A. examined；are not having
B. had examined；would not have
C. had examined；would not have had
D. should examine；would not have
[单项选择]Before using or operating any equipment, you should first （） its manual thoroughly and understand its contents（）.
A. read/sufficient
B. consult/sufficiently
C. read/sufficiently
D. consult/sufficient
[单项选择]（）they are doing has never been done before.
A. That
B. What
C. Why
D. Whether
[单项选择]Preventive maintenance （）.
A. should not be carried out during the watches
B. can only be carried out in port
C. is a kind of maintenances carried out prior to the occurrence
D. is a kind of maintenances carried out after the occurrence
[单项选择]Electrical circuits are protected against overheating by means of a/an （）.
A. circuit breaker
B. amplifier
C. diode
D. capacitor
[单项选择]Maintenance of charts and nautical publications up to date is a statutory requirement under the（）Convention.
A. STCW
B. MARPOL
C. SOLAS
D. ISM
[单项选择]What preventative maintenance should be done frequently to diesel engine starting air receivers?（）
A. Drain the accumulated moisture
B. Test the relief valves
C. Watch the temperature to prevent fluctuations in pressure
D. Clean the interior to remove oil and foreign matter
[单项选择]Improper maintenance of an automatic auxiliary boiler oil burner could result in （）.
A. fuel pump failure
B. fan motor failure
C. increased feedwater consumption
D. decreased boiler efficiency
[单项选择]Which of the routine maintenance procedure listed is required for starting air receivers?（）
A. Frequent draining of accumulated moisture
B. Frequent testing of relief valves
C. A close watch on temperature to prevent fluctuations in pressure
D. Frequent cleaning to re move oil and foreign matter
[单项选择]Which of the routine maintenance procedures listed is required for starting air receivers?（）
A. over-speeding
B. overload
C. low exhaust temperature
D. high crankcase pressure
[单项选择]Routine maintenance of lead acid batteries should include （）.
A. keeping the terminals clean
B. coating cable connections with petroleum jelly
C. maintaining a trickle charge
D. All of the above
[单项选择]Accidental grounds in a shipboard electrical system must be repaired as soon as possible as they will （）
A. result in immediate power outages
B. damage circuit breakers
C. appear on the ground detection system
D. damage insulation and may cause outages
