更多"Electrical power is expressed in （）"的相关试题:
[单项选择]The unit of electrical power is the （）
A. ampere
B. kilovolt
C. watt
D. farad
[单项选择]The time worked beyond regular hours is expressed in term of（）.
A. timeover
B. timeout
C. overtime
D. outtime
[单项选择]Electrical circuits are protected against overheating by means of a/an （）.
A. circuit breaker
B. amplifier
C. diode
D. capacitor
[名词解释]电气设备（electrical equipment）
[单项选择]How would the number 172 be expressed in binary form?（）
A. 10010010
B. 10011001
C. 10101100
D. 10101110
[单项选择]How would the number 231 be expressed as a binary number?（）
A. 11011011
B. 11110011
C. 11100111
D. 11111001
E. 11010011
[单项选择]Heights are expressed（）meters above mean high water.
A. in
B. on
C. by
D. with
[单项选择]Container-ship capacity is normally expressed in（）.
A. deadweight tons
B. measurement tons
C. displacement tons
D. TEU
[单项选择]Accidental grounds in a shipboard electrical system must be repaired as soon as possible as they will （）
A. result in immediate power outages
B. damage circuit breakers
C. appear on the ground detection system
D. damage insulation and may cause outages
[单项选择]Grease coatings on electrical contact surfaces increase contact resistance and should be removed with a/an （）.
A. small wire brush
B. compressed air jet
C. clean dry cloth
D. 10% solution carbon solvent and water
[单项选择]Complete maintenance of electrical motors should include periodic checks for machine （）
A. vibration
B. watertight integrity
C. speed droop
D. reactive power
[单项选择]The greatest detrimental effect on idle electrical equipment, such as cargo pump motors, is the（）.
A. loss of residual magnetism
B. absorption of moisture in the insulation
C. insulation varnish flaking
D. dirt collecting on the windings
[单项选择]Before doing maintenance on electrical equipment, you should （）.
A. turn off power first
B. turn on power first
C. with a test pen in hand
D. tell C/E
[单项选择]How is the intensity of a light expressed in the Light Lists?（）.
A. Luminous range
B. Geographic range
C. Nominal range
D. Meteorological range
[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]（） power is the power developed within the cylinder and can be measured by an engine indicator.
A. The shaft
B. The mechanical
C. The electric
D. The indicated
[单项选择]An important step in fighting any electrical fire is to（）.
A. stop ventilation
B. stop the vessel
C. de-energize the circuit
D. apply water to extinguish the fire
[单项选择]All electrical appliances aboard a vessel should be grounded to（）.
A. prevent them from falling when the vessel rolls
B. protect personnel from electrical shock
C. increase their operating efficiency
D. prevent unauthorized personnal from operating them
