Related Questions

Relays are used for phase faults on long line.
A Impedance
B Reactance
C Either of the above
D None of the above
Computers cannot communicate with each other directly over telephone lines because they use digital pulses whereas telephone lines use analog sound frequencies. What is the name of the device which permits digital to analog conversion at the start of a long distance transmission?
A Interface
B Modem
C Attenuation
D Teleprocessor
E None of the above
Thermal overload relays are used to protect the motor against over current due to
A short-circuits
B heavy loads
C grounds
D all of the above
The inverse definite mean time relays are used for over current and earth fault protection of transformer against
A heavy loads
B internal short-circuits
C external short-circuits
D all of the above
The single phasing relays are used for the protection of
A single phase motors only
B two phase motors only
C two single phase motors running in parallel
D three phase motors
To protect most of the electrical equipment handling low power, the types of relays used are
A Thermocouple
B Electronic and bimetallic
C Both (A) and (B)
D None of the above
কোনো খেলার সরাসরি সম্প্রচারের ডেটা ট্রান্সমিট হবার প্রক্রিয়া- (i) Broadcast Transmission (ii) Duplex Transmission (iii) Simplex Mode Transmission নিচের কোনটি সঠিক?
A i ও ii
B i ও iii
C ii ও iii
D i ii ও iii
Discrimination between main and back up protection is provided by the use of relays which are
A fact
B sensitive
C slow
D none of the above
Switches and relays should be shown in this position with no operating force or applied energy:
A Normal
B Closed
C Offset
D Application
The phase lag produced by transportation relays
A Is independent of frequency
B Is inversely proportional to frequency
C Increases linearly with frequency
D Decreases linearly with frequency

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