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Q 1/50
Score 0
It converts the prime-mover mechanical power into electrical power :________
30
The motor
The transformer
The voltmeter
The generator
Q 2/50
Score 0
It is used for holding the armature stampings and windings in position :_____________
30
Rotor
End plates
Stator core
Stator frame
50 questions
Q.
It converts the prime-mover mechanical power into electrical power :________
1
30 sec
Q.
It is used for holding the armature stampings and windings in position :_____________
2
30 sec
Q.
It is supported by the stator frame and is built up of laminations of magnetic iron alloy :________________
3
30 sec
Q.
Salient poles rotor is used in :________________
4
30 sec
Q.
Non salient poles rotor is used in :________________
5
30 sec
Q.
The method which is used to supply the rotor windings with DC is called :___________
6
30 sec
Q.
The current we must supply the field coils is :________________
7
30 sec
Q.
Brushless excitation is used for :________________
8
30 sec
Q.
The synchronous generator consists of two main parts which are the :________________
9
30 sec
Q.
In big generators the armature coils are embedded in slots on the :__________________
10
30 sec
Q.
The field coils of big generators are wound on : ________________
11
30 sec
Q.
Cooling of synchronous generator is done by :________________
12
30 sec
Q.
It is used to measure speed :________________
13
30 sec
Q.
The fixed part in a synchronous generator is called :________________
14
30 sec
Q.
The moving part in synchronous generator is called :________________
15
30 sec
Q.
In a synchronous generator the part which gives us electricity is :__________
16
30 sec
Q.
The part which connects between field coils and DC supply is :______________
A. Slip rings B. Brushes
C. Shaft D. Both (a )and (b )
17
30 sec
Q.
It is used to hold the brush on the slip ring :________________
18
30 sec
Q.
The synchronous speed ( Ns )depends on :________________
19
30 sec
Q.
The synchronous generator rotor has two types , they are :________________
20
30 sec
Q.
The instrument used to synchronize the generators in parallel is :________________
21
30 sec
Q.
Synchronous generator has mostly two functions , they are :_____________
A. Converting prime-mover to electrical B. Receiving reactive power
C. Both (a )and (b ) D. None of them
22
30 sec
Q.
The synchronous generator produces 50 Hz and has 4 poles its speed is :________
23
30 sec
Q.
It means that the frequency is locked with the rate of rotation :____________
24
30 sec
Q.
The method used to supply the field coils without brushes is :_____________
25
30 sec
Q.
The disadvantage of excitation through brushes :________________
26
30 sec
Q.
The relationship between synchronous speed , frequency and number of poles is :________________
27
30 sec
Q.
We can increase the terminals voltage at generator by :________________
28
30 sec
Q.
The power in generator can be divided into :________________
29
30 sec
Q.
The variation in terminals voltage at synchronous generator is due to :_______
30
30 sec
Q.
When the alternator speed increases , the frequency :________________
31
30 sec
Q.
When the alternator speed increases , the terminals voltage :________________
32
30 sec
Q.
To obtain a higher terminals voltage at the same frequency , you should increase the :________________
33
30 sec
Q.
The terminals voltage of the alternator depends on the :________________
34
30 sec
Q.
Below the saturation point as field current increases , terminals voltage :_______________
35
30 sec
Q.
The generated voltage in an alternator results from :________________
36
30 sec
Q.
We cannot have a self excited alternator without rectifying AC output because :___________
37
30 sec
Q.
When running at a constant speed the terminals voltage of an alternator can be changed by :________________
38
30 sec
Q.
As resistive load is added , the terminals voltage :________________
39
30 sec
Q.
As inductive load increases , the terminals voltage :________________
40
30 sec
Q.
As capacitive load increases , the terminals voltage :________________
41
30 sec
Q.
The sum of electrical power supplied to the load and alternator losses equals :________________
42
30 sec
Q.
Of the following types of losses , which one varies with load :______________
43
30 sec
Q.
Of the following types of losses which one is mechanical losses :____________
44
30 sec
Q.
Most of the electrical power delivered to the load is supplied to the alternator as :________________
45
30 sec
Q.
The purpose of excitation of synchronous generator :________________
46
30 sec
Q.
The conditions for connecting two generators in parallel :________________
47
30 sec
Q.
A synchronous generator has 1200 r.p.m and 6 poles , find the frequency value :________________
48
30 sec
Q.
A synchronous generator has 2 poles and 40 Hz , find the synchronous speed :________________
49
30 sec
Q.
A synchronous generator has 900 r.p.m and 8 poles , find the frequency value :________________
