更多"Mooring winches are often combined "的相关试题:
[单项选择]The majority of automatic mooring winches are spur geared to improve the backward efficiency of the gear train for rendering（）
A. spur geared
B. screw geared
C. worm geared
D. belt driven
[单项选择]The spur geared mooring winches have advantages over worm geared ones in（）
A. higher efficiency of the gear train while reversing
B. the higher gear ratio
C. the multi-start feature
D. higher recovering speed
[单项选择]Electric cargo winches have an overload safety device which normally cuts the current to the winch motor（）.
A. after torque causes line pull to exceed the rated capacity of the winch
B. before the line pull reaches the rated capacity of the winch
C. when the line pull reaches the breaking strength of the fall
D. before the safe working load of the fall is reached
[单项选择]The system of derricks and winches has been largely replaced on newer ships by cranes（）it is very efficient.
A. when
B. because
C. unless
D. though
[单项选择]Main steam and exhaust pipes for winches and similar gear shall not pass through crew accommodation nor, whenever technically possible, through alleyways leading to crew accommodation; where they do pass through such alleyways, they shall be adequately （）.
A. ventilated and tagged
B. ventilated and cooled down
C. insulated and encased
D. insulated and warmed up
[单项选择]Lifeboat winches on a ship are required to be inspected and an entry made in the logbook. What should this entry include? （）
A. The time required to lower a lifeboat
B. The time required to raise a lifeboat
C. The date of inspection and condition of the winch
D. All of the above
[单项选择]Worm geared automatic mooring winches are （） as the multi-start feature reduces the advantage of worm gear iethe high gear radio.
A. popular
B. common
C. in lead position
D. uncommon
[单项选择]In an automatic mooring winches, the wire is paid off the barrel at（） a tension and is recovered at（）tension.
A. lower；igher
B. maximum；higher
C. predetermined minimum；higher
D. predetermined maximum；lower
[单项选择]As matter of fact, the damage to the winches was due to（）.
A. insufficiency of packaging
B. inherent vice of the cargo
C. improper stowage
D. rough handling
[单项选择]As matter of fact，the damage to the winches was due to（）.
A. insufficiency of packaging
B. inherent vice of the cargo
C. improper stowage
D. rough handling
[单项选择]I don't like the weather here. It's often（）
A. depressing
B. depressed
C. depressive
[单项选择]On offshore drilling units，emergency lighting and each emergency power system must be tested at least once a（）.
A. day
B. week
C. month
D. year
[单项选择]Dual electro-hydraulic steering units usually operate （）.
A. with both pumps on line at the same time
B. with one pump on standby
C. with the follow-up gear disconnected
D. only when the rudder is moved amidships
[单项选择]Among the main propulsion units on board the ship with the same capacity, the lightest one is（）.
A. steam engine
B. steam turbine
C. gas turbine
D. diesel engine
[单项选择]Most air conditioning units have （） for adjusting the ratio of recirculated fresh airCare must be taken not to reduce the fresh air so that stuffiness or smells arise.
A. catch plates
B. dampers
C. regulating valves
D. fans
[单项选择]On offshore drilling units，each EPIRB or SART must be tested once every（）.
A. day
B. week
C. month
D. year
[单项选择]On receipt of a distress alert, the SAR units ashore and at sea will（）soonest.
A. coordinate in rescue operation
B. send rescue vessels
C. reach the area at once
D. conduct a sector search
[单项选择]On all vessels equipped with refrigeration units of over 20 cubic foot capacity, （）.
A. a gas mask suitable for protection against each refrigerant used, or a self contained breathing apparatus must be provided
B. it is the sole responsibility of the chief engineer to ascertain that all members of the engineering department are familiar with the use of gas masks or breathing apparatus
C. spare charges shall be carried for at least 50% of each size and variety of gas masks and/or self contained breathing apparatus
D. all of the above
