Monday, July 25, 2016

BSNL TTA Practice Questions



Q1:- When both synchro transmitter and receiver rotors are displace from zero by the same angle they are in 

  1. correspondence 
  2. phase
  3. error
  4. unbalanced field synchronism
ANSWER:- 4



Q2:- capacitor start capacitor run motor is generally coupled with the air conditioner compressor because it 

  1. takes low starting as well as running current
  2. is cheaper
  3. is quit in operation 
  4. does not require any maintenance 
ANSWER:-1



Q3:- A capacitor start capacitor run motor has two capaciotrs. when the motor is started 

  1. only one of the capacitors is in circuit 
  2. both the capacitors are circuit and are connected in parallel
  3. both the capacitors are in circuit and are connected in series
  4. both are in series 
ANSWER:-2



Q4:- By pushing and pulling the rotor shaft a motor can be checked for 

  1. end play 
  2. side play
  3. firm mounting
  4. free shaft movement 
ANSWER:-1



Q5:- Armature short circuits can be detected and identified by which of the following tests?
  1. bar to bar 
  2. voltage drop
  3. growler 
  4. all of the above
ANSWER:-4


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