Electrical Engineering · Question Bank

Instruments & Measurements

94 questions · page 4 of 5. Answer in your head first, then check the solution.

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TypeAll 94Problem solving 17Objective 77
DifficultyAll 94Easy 91Medium 3Hard
#61📘 EE Pocket Reviewer RojasEasy
Which of the following is true about a moving iron type instrument?
AIt has a uniform scale
BIt has a non-linear scale
CIts deflection is directly proportional to the current
DIts deflection is directly proportional to the voltage
#62📘 EE Pocket Reviewer RojasEasy
If the current to be measured is not known, at what range do you start the measurement?
AAt the lowest range, then increase the range
BAt the highest range, then decrease the range
CAt the middle range, then increase the range
DAt the middle range, then decrease the range
#63📘 EE Pocket Reviewer RojasEasy
A moving-iron instrument is connected in a circuit. What will happen if its connections are interchanged?
AIt will give no deflection
BIt will deflect in the opposite direction
CIt will get burned out
DIts reading will be the same
#64📘 EE Pocket Reviewer RojasEasy
The full scale voltage across a moving coil voltmeter is about how much?
A10 V
B100 V
C5 V
D50 mV
#65📘 EE Pocket Reviewer RojasEasy
An ammeter is what type of instrument?
AAn indicating instrument
BA recording instrument
CAn integrating instrument
DA comparison instrument
#66📘 EE Pocket Reviewer RojasEasy
The range of a moving-iron ac ammeter is extended using which of the following?
AA shunt
BA multiplier
CChanging the number of turns of operating coil
DNone of these
#67📘 EE Pocket Reviewer RojasEasy
What is measured by a megger?
AInsulation resistance
BShort circuit resistance
CResistance of the core
DResistance of the armature coils
#68📘 EE Pocket Reviewer RojasEasy
In a dynamometer type instrument, damping is provided by which of the following method?
AAir friction
BFluid friction
CEddy currents
DNone of these
#69📘 EE Pocket Reviewer RojasEasy
Which of the following equipment is not a part of a megger? 1
AHand crank
BMoving-coil meter
CSmall dc generator
DCoil of high inductance
#70📘 EE Pocket Reviewer RojasEasy
Which of the following instruments is used to check the degree of motor shaft misalignment?
ADial indicator
BClamp-on ammeter
CGrowler
DMegohmmeter
#71📘 EE Pocket Reviewer RojasEasy
How are voltmeters connected in a circuit?
AIn series
BIn parallel
CIn series-parallel
DIn parallel-series
#72📘 EE Pocket Reviewer RojasEasy
Which statement is true about a wattmeter?
AIt measures ac power only
BIt measures dc power only
CIt measures both ac and dc powers
DIt measures reactive power only
#73📘 EE Pocket Reviewer RojasEasy
One of the control springs of a permanent magnet moving coil ammeter is broken. If this ammeter is connected to a circuit to measure the current, what will be the reading?
AIt will read zero
BIt will read more than the correct value
CIt will read half of the correct value
DIt will still read the correct value
#74📘 EE Pocket Reviewer RojasEasy
Sensitivity of a voltmeter is expressed in which of the following units?
AVolt/ampere
BAmpere/volt
CVolt/ohm
DOhm/volt
#75📘 EE Pocket Reviewer RojasEasy
Which of the following instruments can be used to measure size of wires?
ATachometer
BMicrometer
CGalvanometer
DNone of these
#76📘 EE Pocket Reviewer RojasEasy
Moving iron instruments have what type of scale?
AUniform scale
BSquared scale
CLinear scale
DLogarithmic scale
#77📘 EE Pocket Reviewer RojasEasy
When the pointer of an indicating instrument is in the final deflected position, which one will be zero?
ADamping torque
BDeflecting torque
CControlling torque
DAll of these
#78📘 EE Pocket Reviewer RojasEasy
Which of the following connections would be most likely to injure the instrument attached?
AAn ammeter in series in the circuit
BA voltmeter connected across the line
CAn ammeter connected across the line
DA voltmeter in series with the line
#79📘 EE Pocket Reviewer RojasEasy
Which of the following is the reason why ammeter shunt is useful?
AIt will increase meter sensitivity
BIt will prevent overheating of the meter pointer
CIt will allow for measurement of large currents
DAll of these
#80📘 EE Pocket Reviewer RojasEasy
What is measured by an ohmmeter?
AVoltage
BAmperage
CResistance
DInsulation resistance

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