# A3-phase breaker is rated at 2000 MVA, 33 kV, its making current will be

1.  35 kA

2.  49 kA

3.  70 kA

4.   89 kA

4

89 kA

Explanation :
No Explanation available for this question

# A3-phase breaker is rated at 2000 MVA, 33 kV, its making current will be

1.  35 kA

2.  49 kA

3.  70 kA

4.   89 kA

4

89 kA

Explanation :
No Explanation available for this question

# A permanent magnet moving coil type ammeter and a moving iron type ammeter are connected in -series in a resistive circuit fed-from output of a half wave rectifier voltage source. If the moving iron type instrument reach 5 A the permanent Magnet Moving coil type instrument is likely to read

1.  zero

2.  2.5A

3.  3.18 A

4.  5 A

4

3.18 A

Explanation :
No Explanation available for this question

# The sensitivity of thermostats as compared with sensitivity of platinum resistance temperature detector over a temperature range of-1000 to 4000C to change in temperature is

1.  100 times

2.  106 times

3.  107 times

4.  103 times

4

106 times

Explanation :
No Explanation available for this question

# If the inductance and capacitance of a system are 1.0 H and 0.01μF respectively and the instantaneous value of current interrupted is 10 amp, the voltage across the breaker contacts will be

1.  50 kV

2.  100 kV

3.  60 kV

4.   89 kA

4

100 kV

Explanation :
No Explanation available for this question

# Which one of the following methods is used to measure power output of a radio transmitter while it is radiating

1.  Electrostatic meter

2.  Three-Wattmeter Method

3.  Three-ammeter method

4.  Two-wattmeter method

4

Three-ammeter method

Explanation :
No Explanation available for this question

# The resistance of a thermometer is 5Ω at 300C and 6.50 at 600C. Using linear approximation, the value of resistance temperature co-efficient at 450 is

1.  0.009/0C

2.  0.0087/0C

3.  0.0085/0C

4.  0.01/0C

4

0.0087/0C

Explanation :
No Explanation available for this question

# A zero to 300 V voltmeter has an error of 12% of the full-scale deflection. If the true voltage is 30V, then the range of readings on this voltmeter would be

1.  20 V to 40 V

2.  24Vto 36V

3.  29.4 V to 30.6 V

4.  29.94 to 30.06 V

4

29.4 V to 30.6 V

Explanation :
No Explanation available for this question

# For protection of rotating machines against lighting surges a combination of

1.  lighting conductor and capacitor are used

2.  lighting conductor and lighting arrester are used

3.  lighting arrester and capacitor are used

4.   lighting arrester alone is used

4

lighting arrester and capacitor are used

Explanation :
No Explanation available for this question

# A single-phase energy meter is operating on 230 V, 50 Hz supply with a load of 20 A for two hours at upf. The meter makes 1380 revolutions in that period. The meter constant is

1.  695 rev/kWh

2.  150 rev/kWh

3.  0.15 rev/kWh

4.  1/150 rev/kWh

4