更多"With No~1 and No~2 alternators runn"的相关试题:
[单项选择]You are running parallel to the coast and estimate that the current is against you.In plotting a running fix using bearings from the same object on the coast，the greatest safety margin from inshore dangers will result if what speed is used to determine（）.
A. Minimum speed estimate
B. Maximum speed estimate
C. Average speed estimate
D. A running fix should not be used under these conditions
[单项选择]To parallel an incoming machine to a running machine therefore it is necessary to ensure firstly that （）.
A. two frequencies must be brought into phase
B. the incoming machine accepts a small amount of load
C. the running machine must be unload
D. both voltages are equal
[单项选择]You are running parallel to the coast and take a running fix using bearings of the same object.If you are making less speed than used for the running fix，in relation to the position indicated by the fix，you will be（）.
A. Closer to the coast
B. Farther from the coast
C. On the track line ahead of the fix
D. On the track line behind the fix
[单项选择]The operation of paralleling two alternators requires the voltages to be （）and also in phase.
A. zero
B. eliminated
C. different
D. equal
[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 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]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 （） 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]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]（） is provided to alternators, in the event of prime mover failure to ensure that the alternator does not act as a motor.
A. Reverse current protection
B. Reverse power protection
C. Synchronising device
D. Frequency meter
[单项选择]The division of kilowatt load between two paralleled alternators is determined by the （）
A. amount of field excitation of the leading machine
B. load-speed characteristics of the governors
C. amount of field excitation to the lagging machine
D. type of alternator
[单项选择]The distance a vessel moves parallel to the original course from the point where the rudder is put over to any point on the turning circle is called the（）.
A. advance
B. drift angle
C. pivoting point
D. transfer
[单项选择]When carrying out a parallel track search pattern，the course of the search units should normally be which of the following?（）
A. In the same direction as the anticipated drift
B. In the opposite direction of the anticipated drift
C. Perpendicular to the line of anticipated drift
D. Downwind
[单项选择]You are attempting to parallel two AC generators, and the syncope pointer is revolving in the fast directionThis indicates that the frequency of the incoming machine is （）.
A. higher than the bus frequency
B. lower than the bus frequency
C. the same as the bus frequency but out of phase with it
D. the same as the bus frequency and the circuit breaker may be closed at any pointer position
[单项选择]You are attempting to parallel two AC generators and the synchroscope pointer is revolving in the slow directionThis indicates that the frequency of the incoming machine is （）.
A. higher than the bus frequency
B. lower than the bus freouencv
C. the same as the bus frequency but out of phase with it
D. the same as the bus frequency, and the circuit breaker may be closed at any pointer position
[单项选择]The broken magenta line which runs parallel to the shorebetween Roanoke Point and Mattituck Inlet marks a（）.
A. fish trap area
B. pipeline
C. demarcation line
D. cable area
[单项选择]The total power consumed in a parallel circuit is （）
A. the sum of the powers used in each load (resistor)
B. divided by the number of loads
C. always less than the power used in the smallest load
D. the sum of the powers used in each individual load never more than the power used in the largest load
