更多"Running an electric winch at slow s"的相关试题:
[单项选择]A Doppler speed log indicates speed over ground（）.
A. at all times
B. in the bottom return mode
C. in the volume reverberation mode
D. only when there is no current
[单项选择]Most medium and slow speed diesels are started by what medium?（）
A. Electric starting motors
B. Hydraulics
C. Compressed air
D. Ether
[单项选择]The power developed by a large slow-speed main propulsion diesel engine is dependent upon the （）
A. quantity of air it takes in and retains in the cylinders during a given time period
B. proportion of trapped air that is utilized in the combustion process
C. thermodynamic efficiency of the engine cycle
D. all of the above
[单项选择]In a large, slow-speed, main propulsion diesel engine, which of the parts listed is under tension when the engine is running?（）
A. Bed plate
B. Column
C. Entablature
D. Tie rod
[单项选择]In slow speed two-stroke engines,（）the fresh air entering begins when and stops as（）
A. the inlet port is opened by the up coming piston； the port is closed by the down going
B. the inlet valve is opened by the down going piston；the inlet valve is closed
C. the inlet port is opened by the down going piston；the port is closed by the up coming
D. the inlet valve is opened
[单项选择]An over-speed trip serves to （）
A. stop the engine by cutting off the cooling water supply
B. stop the engine by closing the air intake
C. slow the engine but not stop it
D. slow the engine to half of normal load
[单项选择]The over-speed trip installed on most diesel engine will stop the engine by shutting off the （）
A. water supply
B. fuel oil supply
C. lube oil supply
D. exhaust damper
[单项选择]The over-speed trip device installed in some diesel engines is automatically actuated by（）
A. spring force
B. hydraulic pressure
C. centrifugal force
D. mechanical linkage
[单项选择]An over-speed trip stops a diesel engine when the engine （）
A. runs out of fuel
B. has low lubricating oil pressure
C. exceeds a set maximum speed
D. has high cooling water temperature
[单项选择]An anchor winch should be equipped with mechanical brakes capable of holding（）.
A. half the breaking strength of the mooring line
B. the full breaking strength of the mooring line
C. the maximum expected tension of the mooring line
D. 50% over the working tension of the mooring line
[单项选择]Winch gears must be maintained in proper alignment to prevent （）.
A. overheating of the lube oil
B. over-speeding of the motor
C. wear on the braking system
D. damage to the teeth
[单项选择]What’s wrong（）the winch?
A. for
B. with
C. to
D. on
[单项选择]We had the winch（）last year.
A. to overhaul
B. overhauling
C. overhauled
D. overhaul
[单项选择]When retrieving the survival craft，the winch operator should stop the winch and check（）.
A. that all personnel are seated in the craft
B. that the cable has not jumped any grooves on the drum
C. which way the wind is blowing
D. the hydraulic fluid level before lifting
[单项选择]In the cargo winch, spur reduction gearing transfers the motor drive to （）.
A. the toping light
B. the board brake
C. the fail-safe
D. the barrel shaft
[单项选择]If a hydraulic pump on a winch accidentally stops while hoisting，the load will stay suspended because（）.
A. a check valve will close that prevents reverse circulation
B. a centrifugal counterweight counteracts the force of gravity
C. the electric pump motor will cut out
D. the control lever will move to the stop position
[单项选择]The limit switches on a ships survival-craft winch system（）.
A. stop the winch just before the craft reaches the final stowage position
B. limit the amount of cable on the drum
C. limit the ascent rate
D. stop the winch in case the craft weighs too much
