Welcome to your MEO Class 4 - Electrical Test 6
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1
Which of the following is/are necessary precaution(s) for paralleling an AC Generator with live bus bars? I. Generator frequency should be close to but slightly lower than bus bar frequency II. Generator voltage should be equal to bus bar voltage III. Current in generator circuit should be less than bus bar current IV. Generator voltage should be in phase with bus bar voltage
2
Which statement is true in relation to AUTO TRANSFORMER? (mcq)
3
which of the following used in earth neutral system
4
Capacitor banks are connected with ac induction motor
5
Which of the following is true regarding distribution system on tankers?
6
In common collector transistor collector amplifier voltage gain
7
Which of the following statement is false for lead acid battery?
8
which of the device protect the generator over load
9
NER- what is true for high voltage circuit?
10
Class A amplifier percentage?
12
Characteristic of laser light
13
Advantage of nickel cadmium battery
14
class B amplifier output
15
The main use of a Class-C amplifier is
16
ACB trips at what condition
17
For faithful amplification, a transistor must :
18
When tow generators are running in parallel and field of one of them is weakened too much then it will SURE
19
A control action which produces a corrective signal relative to the length of time the controlled variable has been away from the set point, is known as
20
Class A amplifier coupled with transformer what will be efficiency
21
Which of the following is/are necessary precaution(s) for paralleling an AC Generator with live bus bars? I. Generator frequency should be close to but slightly lower than bus bar frequency II. Generator voltage should be equal to bus bar voltage III. Current in generator circuit should be less than bus bar current IV. Generator voltage should be in phase with bus bar voltage
22
With regards to AVR which all statements are true?
23
ambient temperature rise in transistor
24
the amount of current needed for full protection in case of iccp system for a particular ship will be most affected by
25
3 phase insulated earth system one of the path contact with hull
27
In properly biased npn transistor most free electron from emitter
28
while doping the semiconductor is adding impurities, why it is called impurities
29
3 phase, if it is connected insulated neutral earth system to the ship hull short crt
30
What happens to the amount of energy stored in the electromagnetic field when the current through an inductor is cut in half?
31
which of the following prevents moisture condensation in a weather deck switch board SURE 1.installing light bulb in pedestal stand 2.coat internal of switch box With epoxy sealed 3.venting the switchboard regularly. 4 using strip heater
32
Ground occur in the electrical machinery as a result of insulation failure.
33
For a given line voltage, four heating coils will produce maximum heat when connected in
34
Doping materials are called impurities because they
35
Transformer having laminated core?
36
which of the following true regards to syncrhoscope
37
TRUE About Battery storage
38
which of the following is true for synchroscope (mcq)
39
Unique feature of a cc transistor amplifier circuit is
40
Which of the following is true with regards to use regenerative braking in a reversible pole change multispeed type AC induction motor? (Multiple choice question)
41
wound rotor motor changing the speed torque characteristic control and speed control purpose
42
Which allow to equalize power factor of two alternator
43
BJT transistor used as an amplifier it operates in
44
3 phase, if it is connected insulated earth system to the ship hull
45
which of the following consider to be the safest protection from static electricity discharge when connecting or disconnecting cargo hose and metal arms?
46
capacitor and resistor connected in series with the sine wave generator frequency is set so that the capacitor reactance is equal to the resistance and thus equal amount of voltage appears across each component, what happen when frequency. What happens if the frequency is increased?
47
What will be in motor, for electro steering gear?
48
The basic control action of a magnetic amplifier depends upon _____________.
49
n type semiconductor doping substance
50
impurities in semiconductor
