1. If two meters X and Y requires 40mA and 50mA respectively, to give full scale deflection, then:
a) X is more sensitive
b) Y is more sensitive
c) Both X and Y are equally sensitive
d) It would not be possible to access the sensitivity on the basis of the given data
2. The reliability of the instrument refer to:
a) Measurement of changes due to temperature variations
b) Degree to which repeatability continues to remain within specified limits
c) The life of the instrument
d) The extent to which the characteristics remain linear
3. The damping torque must operate only when the moving system of the indicating instrument is:
a) Actually moving
b) Stationary
c) Just starting to move
d) Near its full deflection
4. If a voltmeter is connected, like an ammeter in series to the load:
a) The measurement reading will be too high
b) Almost no current will flow in the circuit
c) The meter will burn
d) An instantaneously high current will flow
5. Preferred material for permanent magnet is:
a) Stainless steel
b) Alnico
c) Tungsten steel
d) Soft iron
6. Air friction damping is used in the instruments which is:
a) Moving iron
b) Moving coil
c) Induction
d) Hot wire
7. PMMC instrument gives uniform scale because:
a) It uses spring control
b) It uses eddy current damping
c) The deflection torque is proportional to the instrument current
d) Both (a) and (c)
8.An instrument that is capable of measuring only dc is:
a) Moving coil
b) Moving iron
c) Thermo couple
d) None of the above
9. Maxwell-Wien bridge is used to measure:
a) Inductance
b) Capacitance
c) Dielectric loss
d) Frequency
10.A ballistic galvanometer is used to measure:
a) Charge
b) Current
c) Voltage
d) Frequency
0 comments:
Post a Comment