An induction wattmeter can be used for_________________?

Related Mcqs:

1. In a 3-phase power measurement by two wattmeter method the reading of one of the wattmeter was zero. The power factor of the load must be_______________?

   A. unity
   B. 0.5
   C. 0.3
   D. zero

2. In a 3-phase power measurement by two wattmeter method, both the watt meters had identical readings. The power factor of the load was___________?

   A. unity
   B. 0.8 lagging
   C. 0.8 leading
   D. zero

3. The pressure coil of a wattmeter should be connected on the supply side of the current coil when______________?

   A. load impedance is high
   B. load impedance is low
   C. supply voltage is low
   D. none of the above

4. A dynamometer wattmeter can be used for______________?

   A. both D.C. and A.C.
   B. D.C. only
   C. A.C. only
   D. any of the above

5. In a low power factor wattmeter the compensating coil is connected_______________?

   A. in series with current coil
   B. in parallel with current coil
   C. in series with pressure coil
   D. in parallel with pressure coil

6. The resistance in the circuit of the moving coil of a dynamometer wattmeter should be_____________?

   A. almost zero
   B. low
   C. high
   D. none of the above

7. In a low power factor wattmeter the pressure coil is connected_______________?

   A. to the supply side of the current coil
   B. to the load side of the current coil
   C. in any of the two meters at connection
   D. none of the above

8. Wattmeter cannot be designed on the principle of_________________?

   A. electrostatic instrument
   B. thermocouple instrument
   C. moving iron instrument
   D. electrodynamic instrument

9. A potentiometer may be used for_________________?

   A. measurement of resistance
   B. measurement of current
   C. calibration of ammeter
   D. calibration of voltmeter
   E. all of the above

10. An induction meter can handle current up to_____________?

    A. 10 A
    B. 30 A
    C. 60 A
    D. 100 A