更多"An overspeed safety device is usual"的相关试题:
[单项选择]A device fitted over the discharge opening on a relief valve consisting of one or two woven wire fabrics is called a flame（）.
A. stopper
B. screen
C. filter
D. restrictor
[单项选择]A carburetor is required to have a safety device called a(n)（）.
A. pressure release
B. backfire flame arrestor
C. automatic shut off
D. flow valve
[单项选择]Safety shackles are fitted with（）.
A. a threaded bolt
B. a round pin，with a cotter pin
C. a threaded bolt，locknuts，and cotter pins
D. round pins and locknuts
[单项选择]Air chambers are usually fitted to reciprocating pumps in order to （）.
A. increase discharge pressure
B. increase suction vacuum
C. develop pulsation flow
D. keep a steady rate of flow
[单项选择]A special device that，when fitted into the rotary table，transmits torque to the kelly and simultaneously permits vertical movement of the kelly to make the hole is called a（）.
A. master bushing
B. kelly slips
C. kelly bushing
D. rotary bushing
[单项选择]Overspeed of the diesel engine driving an electric generator could cause（）.
A. low voltage trip
B. reverse power trip
C. damage to windings
D. excessive exhaust temperatures
[单项选择]To check the setting of the overspeed trip on a diesel powered generator, you would use a （）.
A. tachometer
B. torsion meter
C. dynamometer
D. pony brake
[简答题]CCC控制器AUX窗口显示：“OVERSPEED SD”，表示什么？
[单项选择]Insufficient end clearance on newly fitted piston rings in a diesel enginewill cause the rings to（）
A. jam in the most worn part of the cylinder when the rings expand
B. break in the most worn part of the cylinder when the rings expand
C. wear eccentrically on the side opposite the end gap
D. overheat and jam at the top center on the combustion stroke
[单项选择]Preventer bars are fitted on lifeboat releasing hooks to prevent（）.
A. the falls from unhooking if the releasing gear is operated accidentally while the boat is being lowered
B. operation of the release lever until the boat is waterborne
C. the falls from rehooking after they have been released
D. accidental unhooking when the falls become slack
[单项选择]Most hydraulic steering gears are fitted with relief valves which（）
A. function when the rudder is amidships
B. relieve excess whip pressure from the hydraulic oil system
C. protect the piping assembly from external rudder shock
D. relieve excessive telemotor pressure
[单项选择]Improperly fitted piston rings in a diesel engine can cause（）
A. excessive lube oil consumption
B. lower than normal lube oil temperature
C. higher than normal exhaust back pressure
D. excessive crankshaft end play
[单项选择]The connecting rob is fitted between the crosshead and the crankshaftIt transmits the firing force, and together with the crankshaft convert the （） motion to a （） motion.
A. rotary；reciprocating
B. up and down；fore and aft
C. fore and aft；up and down
D. up and down；rotary
[单项选择]The bridge is fitted（）two radars.
A. before
B. on
C. from
D. with
[单项选择]Battens are fitted in cargo holds across the frames of the vessel from the turn of the bilge upward. The purpose of these cargo battens is（）.
A. for securing a snatch block when snaking cargo into the wings of the hold
B. to prevent cargo from coming in contact with the vessel's frames or shell plating
C. tp prevent fittings to which cargo lashing may be secured
D. to support the dunnage floors which are laid down between tiere of cargo
[单项选择]Cargo vessels being navigated，and fitted with emergency lighting and power systems，shall have their emergency systems tested at least once（）.
A. a month
B. in each week
C. in every 6 months
D. in every 12 months
[单项选择]If your passenger vessel is fitted with a loudspeaker system，it must be tested at least once （）.
A. every week
B. a day
C. every trip
D. a watch or once a trip，whichever is shorter
