1. Moving Iron instruments can be used on:
a) ac and dc bothb) ac only
c) dc only
d) none of the above
2. In spring control instruments, controlling torque:
a) can be adjusted easilyb) cannot be adjusted easily
c) remains the same
d) varies with the load
3. Chemical effect is used for the operation of:
a) voltmeterb) ammeter
c) ampere hour meter
d) kWh meter
4. The deflection torque can be produced by:
a) gravity controlb) spring control
c) air friction
d) magneitcally
5. Moving coil instruments are:
a) permanent magnet typeb) dynamometer type
c) induction type
d) permanent magnet and dynamometer type
6. For increasing the range of an ammeter, connect:
a) a high value resistance in series with the ammeter coilb) a high value resistance in parallel with the ammeter coil
c) a low value resistance in parallel with the ammeter coil
d) a low value resistance in series with the ammeter coil
7. A galvanometer can be used for measuring current and voltage of a circuit by:
a) shunt onlyb) connecting high value of resistance in series only
c) shunt for measuring current and high resistance in series for voltage
d) without shunt and series resistance
8. Most commonly used watt meter is:
a) induction typeb) electrostatic type
c) dynamometer type
d) moving iron type
9. The energy meter used for measuring energy of a dc circuit is:
a) ampere hour meterb) induction type
c) electrostatic type
d) dynamometer type
10. The energy consumption of MI instrument as compared to MC instrument is:
a) sameb) more
c) less
d) very small
