更多"Electric generators can be protecte"的相关试题:
[单项选择]Electric circuits are protected against overloads and short circuits by means of a/an ().
A. circuit breaker
B. amplifier
C. diode
D. capacitor
[单项选择]Protection of cargo against tainting damage can best be obtained by().
A. Ventilating the space
B. Not ventilating the space
C. Proper use of paper separation and dunnage
D. Segregation of cargo by using different hatches
[单项选择]Any electric motor can be constructed to be().
A. short proof
B. ground proof
C. explosion proof
D. overload proof
[单项选择]The Shipowner’s right of the lien can()against all goods consigned to the same person on the same voyage,even under different bills of lading,but not against goods on different voyages under different contracts.
A. taken
B. be exercised
C. be done
D. be had
[单项选择]Rotating flyweights acting against spring pressure make a simple type of ().
A. governor
B. safety valve
C. reducing valve
D. feed water regulator
[单项选择]Electric insulation is made of organic substances and so gradually () with age.
A. deteriorates
B. increases
C. are fouled
D. becomes better
[单项选择]Diesel engine electric starting motors generally require heavier duty motors and motors and operate at higher voltages than comparable starting motors for gasoline engines due to()
A. higher speed required
B. flywheel-effect
C. lower starting temperatures
D. higher compression pressures
[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]Electrical circuits are protected against overheating by means of a/an ().
A. circuit breaker
B. amplifier
C. diode
D. capacitor
[单项选择]The backup system on an electric start survival craft is a().
A. hydraulic system
B. pneumatic system
C. spare battery
D. hand crank
[单项选择]In comparison to electric power,hydraulic power for jacking systems has the advantage of().
A. better control capabilities
B. less maintenance and repair
C. fewer personnel needed during jacking
D. less preload needed
[单项选择]() is used to produce electric power.
A. An alternator
B. fresh water generator
C. A compressor
D. A clarifier
[单项选择]If the electric motor driving an air compressor fails to start, the cause may be a ().
A. leaking unloader
B. tripped circuit breaker
C. control line leak
D. defective pop valve
[单项选择]I strongly protest against your verbal instruction()you intend berthing a Greek ship out side of my own.
A. where
B. that
C. this
D. which
[单项选择]An action for indemnity against a third person may()after the expiration of the year if brought within the time allowed by the law of the court seized of the case.
A. be carried out
B. encountered
C. be met with
D. be bringing