1- In an alternator, the armature reaction influences the magnitude of Wave form of generated voltage. O Flux O Terminal voltage per phase Speed of the machine O No load loss O 2- Brushless excitation system consisting :of

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Question A) Choose the right answer
1-In an alternator, the armature reaction
influences the magnitude of
Wave form of generated voltage. O
Flux O
Terminal voltage per phase O
Speed of the machine
No load loss O
2- Brushless excitation system consisting
:of
stator and rotor field winding and
power diodes
Stator field winding and power diodes
stator and rotor field winding and
capacitor
Everything mentioned in the options
3- If input mech. Power of SG constant,
:the functionality of AVR is
Control flux of rotor
Control terminal voltage O
Control Load angle O
Control flux and terminal voltage O
4- What will happen if a stationary
alternator (off) is connected to a live
?power system
It will disturb generated e.m.f. of other
paralleled alternators.
It will decrease bus bar voltage O
It will get short circuited O
It is likely to run as a synchronous
motor
O
O
40.
90
5- The winding of a 4-pole alternator
having 36 slots and a coil span of 1 to 8
is short-pitched by............. degrees
150
20
O
6- A three phase synchronous generator
110 MVA, 11 KV, 50 Hz has synchronous
reactance of 1.5 p.u. the power angle -
➖➖➖➖➖➖➖
- - when the synchronous
generator supplies 70 MW
19.46 O
11.46 O
110.46 O
21.46 O
17.46 O
7- Voltage generated per phase in an
alternator is proportional to
Flux per pole O
Frequency of waveform O
Everything mentioned in the options O
Winding factors O
Number of turns in armature O
8- The standard practice of synchronous
generator construction now a days is
to have
Rotating field O
Cylindrical field O
Either of the above
Rotating armature O
9- To have two alternators in parallel.
which of the following factors should
?be identical for both
Frequency O
O
Voltage O
O
Phase sequence O
Voltage, frequency and phase
sequence
Voltage, frequency, phase sequence
and apparent power
10- Adjustment resistance in rotor system
will when three phase load
.decrease
Increase O
not change O
remain constant O
decrease O
Transcribed Image Text:Question A) Choose the right answer 1-In an alternator, the armature reaction influences the magnitude of Wave form of generated voltage. O Flux O Terminal voltage per phase O Speed of the machine No load loss O 2- Brushless excitation system consisting :of stator and rotor field winding and power diodes Stator field winding and power diodes stator and rotor field winding and capacitor Everything mentioned in the options 3- If input mech. Power of SG constant, :the functionality of AVR is Control flux of rotor Control terminal voltage O Control Load angle O Control flux and terminal voltage O 4- What will happen if a stationary alternator (off) is connected to a live ?power system It will disturb generated e.m.f. of other paralleled alternators. It will decrease bus bar voltage O It will get short circuited O It is likely to run as a synchronous motor O O 40. 90 5- The winding of a 4-pole alternator having 36 slots and a coil span of 1 to 8 is short-pitched by............. degrees 150 20 O 6- A three phase synchronous generator 110 MVA, 11 KV, 50 Hz has synchronous reactance of 1.5 p.u. the power angle - ➖➖➖➖➖➖➖ - - when the synchronous generator supplies 70 MW 19.46 O 11.46 O 110.46 O 21.46 O 17.46 O 7- Voltage generated per phase in an alternator is proportional to Flux per pole O Frequency of waveform O Everything mentioned in the options O Winding factors O Number of turns in armature O 8- The standard practice of synchronous generator construction now a days is to have Rotating field O Cylindrical field O Either of the above Rotating armature O 9- To have two alternators in parallel. which of the following factors should ?be identical for both Frequency O O Voltage O O Phase sequence O Voltage, frequency and phase sequence Voltage, frequency, phase sequence and apparent power 10- Adjustment resistance in rotor system will when three phase load .decrease Increase O not change O remain constant O decrease O
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