# Measurement and Instrumentation 1 EE AND ECE SHORT NOTES

## Measurement and Instrumentation 1

Category –EE Online Test

Attempt Free Measurement and Instrumentation 1 Here. Read The Important Electrical MCQ From Below.

 1 Relative permittivity can be measured by ____ bridge Schering [other wrong options are – Wheatstone, Hay’s, De santy, ]
 2 Rosette gauges are used to measure strain in more than one direction [other wrong options are – amplify strain values, measure variable strain, compensate for temperature variations, ]
 3 For thermocouple measuring instruments which of the following statements is incorrect ? If calibrated on D.C., they cannot be used for A.C. signals [other wrong options are – Their calibration does not change with time or temperature, They read r.m.s. values, They are incapable of standing any overloads, ]
Measurement and Instrumentation 1
 4 Radio frequency can be measured by which of the following frequency meters ? Hetrodyne frequency meter [other wrong options are – Weston frequency meter, Electrical resonant frequency meter, None of the above, ]
 5 By a ‘Rotameter’ we can measure flow [other wrong options are – specific gravity, viscosity, rotation, ]
 6 Null type recorders are potentiometric recorder [other wrong options are – bridge recorders, LVDT recorders, any of the above, ]
 7 An induction watt meter measures only the true power [other wrong options are – the reactive power, the apparent power, the true power and the reactive power, ]
Measurement and Instrumentation 1
 8 A very accurate voltmeter, when used to measure voltage across a low resistance, gives inaccurate reading because the sensitivity of the meter is too low [other wrong options are – the current drawn by the meter is too low, the higher scale has been selected, any of the above, none of the above]
 9 Weston cell is a good standard of voltage [other wrong options are – good source of current, good source of power, none of the above, ]
 10 Meter ranges are so selected that the indications are obtained near the middle of the scale [other wrong options are – top of the scale, bottom of the scale, alone of the above, ]
 11 Torque weight ratio will be least in ____ instruments. dynamo-meter [other wrong options are – moving iron, moving coil, all above, ]
 12 A power factor meter has _____ control springs. no [other wrong options are – one, two, four, ]
 13 Permanent magnets used in instruments are generally made of Alnico [other wrong options are – stainless steel, Y-alloy, cast iron, ]
Measurement and Instrumentation 1
 14 A portable instrument is likely to have ____ clamping. eddy current [other wrong options are- gravitational, pneumatic, fluid friction, ]
 15 In the measurement of power by two watt-meter method, when the readings of the two watt-meters are equal and opposite, it can be concluded that power factor is zero [other wrong options are – unity, lagging, leading, ]
 16 ____ type instrument has identical calibration for A.C. as well as D.C. values ? Hot wire [other wrong options are – Moving coil, Induction, Moving iron, ]
 17 Which of the following instruments cannot be used for the measurement of A.C. as well as D.C. quantities ? Induction type instruments [other wrong options are – Electrostatic instruments, Moving iron instruments, Hot wire instruments, ]
Measurement and Instrumentation 1
 18 Two holes in the disc of energy-meter are drilled at the opposite sides of the spindle to eliminate creeping at no load [other wrong options are – improve its ventilation, increase its deflecting torque, increase its braking torque, ]
 19 Instrument transformers are both (a) and (b) [other wrong options are – potential transformers, current transformers, power transformers, ]
 20 If an instrument has cramped scale for larger values, then it follows logarithmic law [other wrong options are – square law, uniform law, none of the above, ]

Measurement and Instrumentation 1