更多"The operation of paralleling two al"的相关试题:
[单项选择]The operation of （） two alternators requires the voltages to be equal and also in phase.
A. paralleling
B. series-mounting
C. running
D. control
[单项选择]The operation between two fuel injections is called a （）.
A. turning cycle
B. working cycle
C. working hour
D. working stroke
[单项选择]While paralleling two AC generators using synchronizing lamps only, both lamps will go dark when the generators are （）.
A. running at the same speed
B. grounded
C. of the same polarity
D. in phase
[单项选择]Prior to closing the breaker when paralleling two AC generators, the recommended practice is to have the frequency of the incoming machine （）
A. slightly less than the line frequency
B. the same as the line frequency
C. slightly greater than the line frequency
D. All of the above
[单项选择]When paralleling two AC generators, the frequency of the machine coming on-line, immediately prior to closing its breaker, should be （）
A. slightly less than the oncoming generator frequency
B. the same as the bus frequency
C. slightly greater than the bus frequency
D. the same as the bus voltage
[单项选择]The load between two steam-driven alternators operating in parallel may be adjusted by varying （）
A. the speed of the alternators
B. the field strength of the machines
C. the power factor of the alternators
D. steam supply to the prime movers
[单项选择]To equalize the power factor of two alternators operating in parallel, the （）
A. field excitation of both units is adjusted
B. governors of both units are adjusted
C. phase sequence is altered
D. kilowatt load is evenly divided
[单项选择]Automatic mechanical ventilation shutdown is required for CO2 systems protecting the（）.
A. machinery spaces
B. cargo compartments
C. living quarters
D. galley
[单项选择]Which of following physical abilities is not required as to the routine movement around a vessel?（）
A. Maintain balance and move with agility
B. Climb up and down vertical ladders and stairways
C. Open and close watertight doors
D. Take part in vessel evacuation procedures
[单项选择]A SOLAS passenger ship safety certificate is required on all（）.
A. T-Boats carrying more than 49 passengers for hire
B. T-Boats that carry more than 12 passengers on an international voyage
C. T-Boats carrying more than 150 passengers for hire
D. large excursion vessels on lakes，bays，sounds，and river routes
[单项选择]Which of the following adjustments is always required whenever the diesel engine governor oil has been drained and renewed?（）
A. speed droop
B. compensation
C. idle speed setting
D. load limit control
[单项选择]A vessel cannot comply with all of the SOLAS requirements due to its construction. Where will this be indicated?（）
A. Nowhere; the vessel must comply to engage in international trade
B. On the reverse of the SOLAS certificate
C. On the Exemption Certificate
D. On the Certificate of Inspection
[单项选择]The （） engine is used for alternators and sometimes for main propulsion with a gearbox to provide a propeller of between 90 to 120 rpm.
A. four-stroke
B. two-stroke
C. slow speed
D. reversible
[单项选择]Diesel engines driving alternators operating in parallel must maintain set frequency regardless of load changesThe governor characteristic used to accomplish this is known as （）
A. actuation
B. sensitivity
C. compensation
D. thrust shaft
[单项选择]The （） engine is used for alternators and some times for main propulsion with a gearbox to provide a propeller of between 90 to 120 rpm.
A. four-stroke
B. two-stroke
C. slow speed
D. reversible
[单项选择]The transfer procedures for oil products are required to be posted （）.
A. in the pilothouse
B. in the officer's lounge
C. in the upper pumproom flat
D. where they can be easily seen or readily available
[单项选择]During a fire drill on a ship，what action is required?（）
A. Start each fire pump
B. Launch and run a lifeboat
C. Inventory rescue and fire equipment
D. Inspect fire hoses
