海船船员考试
单选题The correct phase rotation of a three-phase alternator can be checked with a（）A dynamometerB power factor meterC three-phase motorD polyphase voltmeter
题目
dynamometer
power factor meter
three-phase motor
polyphase voltmeter
参考答案和解析
相似问题和答案
第1题：
In a modern three-phase A.C. synchronous brushes generator, the excitation winding is on the rotor. That means .
A.The generator need not excitation.
B.The winding on the rotor is for inputting excitation current.
C.There are three phase windings on the rotor.
D.The generator has no brushes.
第2题：
What will be the phase angle relationship of a six-pole, three-phase, rotating field generator?
A.60
B.120
C.180
D.360
第3题：
A.1000
B.900
C.700
D.600
第4题：
Choose the two correct statements regarding Oracle WebLogic Server（）
- A、 a server instance can be associated with multiple machines
- B、 a machine can be associated with multiple server instance
- C、 a server instance can be associated with only a single machine
- D、 a machine can be associated with only one server instance
正确答案:B,C
第5题：
Which information is contained in a AAA authentication method list?（）
- A、A pointer to the address where a RADIUS server can be located
- B、A sequential list of user authentication methods
- C、A description of what a user can execute on a router
- D、The setup for the authentication phase on a router
正确答案:B
第6题：
Which of the following statements is correct?
A．The definition phase results in the Software Requirements Specification.
B．Testing is optional in software life cycle.
C．CASE tools can only aid in the design phase of a software life cycle.
D．A change during a later phase does not require the documentation of all earlier phases to be updated.
第7题：
High-speed rotation in a centrifugal purifier can produce a force ______the force of gravity.
A.many thousand times larger than
B.the same as
C.many thousand times smaller than
D.which has nothing to do with
第8题：
An alternator is being paralleled with one on the line At the instant the circuit breaker is close, the frequency of the incoming alternator will normally
A.increase
B.not change
C.decrease
D.be exactly 60 hertz
第9题：
Which of the following options lists the steps in PPP session establishment in the correct order?（）
- A、Optional authentication phase, link establishment phase, network layer protocol phase.
- B、Network layer protocol phase, link establishment phase, optional authentication phase.
- C、Network layer protocol phase, optional authentication phase, link establishment phase.
- D、Link establishment phase, network layer protocol phase, optional authentication phase.
- E、Link establishment phase, optional authentication phase, network layer protocol phase.
- F、Optional authentication phase, network layer protocol phase, link establishment phase.
正确答案:E
第10题：
For the following items ，which one can be used to authenticate the IPsec peers during IKE Phase 1？（）
- A、pre-shared key
- B、integrity check value
- C、XAUTH
- D、Diffie-Hellman Nonce
正确答案:A