EE AND ECE SHORT NOTES-Measurement and Instrumentation 1

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, ]
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, ]
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, ]
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, ]
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, ]
ONLINE MCQ EE AND ECE-CONTROL SYSTEMS 7
EE SHORT NOTES-A.C. FUNDAMENTALS 5

One Response

  1. Lisa October 12, 2017

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