更多"If two A.C.generators are to be ope"的相关试题:
[单项选择]If two AC generators are operated in parallel, the load is distributed evenly by（）
A. a rheostat
B. a balancing coil
C. changing field excitation
D. adjusting the governor settings
[单项选择]If two AC generators are to be operated in parallel, the load is distributed evenly by（）
A. means of rheostat the governor settings
B. a balance coil excitation
C. adjusting the governor settings
D. changing excitation
[单项选择]It （） for an emergency generator to require paralleling.
A. is usual
B. is not usual
C. is necessary
D. is not impossible
[单项选择]Electrically operated safety devices on auxiliary diesel engines function to stop the engine by （）.
A. increasing the volume of intake air
B. shutting off the fuel supply
C. increasing the engine back pressure
D. over-speeding the engine
[单项选择]Recharging a previously used cartridge-operated dry-chemical extinguisher is accomplished by（）.
A. authorized fire equipment servicing personnel only
B. replacing the propellent cartridge and refilling with powder
C. puncturing the cartridge seal after installation
D. recharging the cartridge and refilling it with powder
[单项选择]On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is （）.
A. hydraulic
B. electric
C. steam
D. diesel
[单项选择]If a centrifugal pump were continually operated with the discharge valve closed, the （）.
A. motor controller overload would open
B. pump would eventually overheat
C. relief valve would continuously cycle open
D. motor would overheat
[单项选择]（） can be operated independently or locked together and operated as a twin-job cranes of double capacity.
A. Two derricks
B. A derrick and a crane
C. Two cranes
D. A crane and a winch
[单项选择]According to the way the steering gear is operated, the steering gear may be divided into: hand - steering, （） and automatic steering.
A. hydraulic steering
B. follow-up steering
C. remote control steering
D. air controlled steering
[单项选择]Line throwing equipment should not be operated（）.
A. during a rain storm
B. in an explosive atmosphere
C. near a lifeboat station
D. by other than licensed officers
[单项选择]A diesel engine should not be operated at low loads for long periods of time because（）
A. heavy carbon deposits will buildup on the valves and in the exhaust
B. fuel dilution is increased at low load
C. exhaust valves may be damaged
D. all of the above
[单项选择]Which of the following is operated from the main engine room console on an automated vessel?（）
A. Fire pump and lube oil pump
B. Lube oil pump and distilling plant
C. Distilling plant and shaft alley door
D. Shaft alley door and fixed CO2 release
[单项选择]Manually operated band brakes may be fitted and （） will have a brake arranged to fail-safe.
A. the drive pump
B. the drive motor
C. the warp end
D. the purchase
[单项选择]A spur gear pump should be operated with the discharge valves （）.
A. slightly opened
B. throttled
C. fully opened
D. halfway opened
[单项选择]The ship should be operated by a company which is issued a(an)（）relevant to ship.
A. ISM
B. DOC
C. SMC
D. PSC
[单项选择]The injector pump is operated by a cam which drives （） up and down.
A. the needle valve
B. the plunger
C. the piston
D. the cylinder
