Wireman – Semester 4,Module 6- SYNCHRONISING OF ALTERNATOR

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Common for Wireman Trade 2nd Year

NAME *

NAME OF THE ITI *

MOBILE NUMBER *

1 : What is the necessity of syncronising of alternators? *

2 points

A : To increase the voltage

B : To increase the voltage

C : To meet the increased power demand

D : Top minimise the current

2: Which is the condition for paralleling of two alternators? *

2 points

A : Frequency must be same

B : Frequency must be same

C : Rating must be same

D : Phase sequence must be different

3: What is the condition of incoming alternators voltages for synchronising of alternators? *

2 points

A : Out put voltage of alternators must be different

B : Out put voltage of alternators must be different

C : Voltage of incoming alternator must be more

D : Incoming voltage of alternator must be less

4 : When the three lamps used in dark lamp method will light and go out simultaneously? *

2 points

A : Frequencies of machines are different

B : Frequencies of machines are different

C : Speed of alternators are same

D : Out put voltage of alternators are same

5 : What is the use of dark and bright lamp method? *

2 points

A : To start the alternator

B : To start the alternator

C : For synchronising of alternators

D : To change the excitation

6 : Which instrument is used for parallel operation of alternators? *

2 points

A : Synchroscope

B : Synchroscope

C : Phase sequence meter

D : Centre zero ammeter

7 : What is the purpose of synchros cope for synchronising of alternators? *

3 points

A : To check the voltages

B : To check the voltages

C : Indicate the difference in voltage and phase sequence

D : To indicate the exact time for synchronising

8: What basis the load is shared by the two alternators after synchronised? *

3 points

A : Sharing the load equally irrespective of KVA ratings

B : Sharing the load equally irrespective of KVA ratings

C : Based on the proportion of their KVA ratings

D : Sharing the load according to their voltage

9.How many lamp using synchronisation ? *

2 points

A 3 lamps

B 4 lamps

C 6 lamps

D 2 lamps

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