Easy Objective Instruments & Measurements Questions – Electrical Engineering

#1📜 EE Pre-Board August 2012📘 PowerhouseEasy

Moving coil instruments are used

AIn ac circuits only

BIn dc circuits only

CBoth in ac and dc circuits

DFor measuring voltage only

#2📜 EE Pre-Board March 2013📘 PowerhouseEasy

Which of the following ammeters is the most sensitive?

A0-100 micro ammeter

B0-5 milli ammeter

C0-1 micro ammeter

D0-50 milli ammeter

#3📜 EE Pre-Board March 2014📘 PowerhouseEasy

Which of the following equipment is not a part of meggar?

Ahand crank

Bmoving coil meter

Ca coil of high inductance

Dgear box generator

#4📜 EE Pre-Board March 2015📘 PowerhouseEasy

The syncroscope is an instrument used to indicate the

ASpeed of motor

BPhase relationship between the current and voltage

CPhase relationship between two voltages

DPhase relationship between the true power and the reactive power

#5📜 EE Pre-Board March 2015📘 PowerhouseEasy

Sensitivity of a voltmeter is expressed as

AVolts/Ohm

BOhms/Volt

COhm-Volt

D1/Ohm-Volt

#6📜 EE Pre-Board March 2016📘 PowerhouseEasy

Which instrument is connected across the load?

AVoltmeter

Bammeter

Cohmmeter

Dwattmeter

#7📜 EE Pre-Board March 2017📘 PowerhouseEasy

A varmeter, when paired with other devices, measures __________ factor.

Adiversity

Bpower

Cload

Ddemand

#8📜 EE Pre-Board March 2017📘 PowerhouseEasy

What instrument measures the insulation of a powerline?

Agrowler

Bohmmeter

Cgalvanometer

Dmegger

#9📜 EE Pre-Board March 2018📘 PowerhouseEasy

By using two wattmeter method, power can be measured in

A3-phase, 2-wire

B3-phase, 3-wire

C3-phase, 4-wire

DAll of these

#10📘 EE Pocket Reviewer RojasEasy

When using an ohmmeter, disconnect the applied voltage from the circuit being checked. Why?

AThe voltage source will increase the resistance

BThe current will decrease the resistance

CThe ohmmeter has its own internal battery

DNo current is needed for the meter movement

#11📘 EE Pocket Reviewer RojasEasy

A megger is basically what type of an instrument?

AMegohmmeter

BVoltmeter

CAmmeter

DWatt-hour meter

#12📘 EE Pocket Reviewer RojasEasy

Hot wire instruments are using which type of scale?

ASquared

BUniform

CLogarithmic

DLinear

#13📘 EE Pocket Reviewer RojasEasy

Which of the following damping methods is common in moving coil instruments?

AAir damping

BSpring damping

CFluid damping

DEddy-current damping

#14📘 EE Pocket Reviewer RojasEasy

What will happen to the needle of an ohmmeter when an open capacitor is connected across its terminals?

AIt will stay on zero reading position

BIt will move from infinity to zero position

CIt will stay on infinity reading position

DIt will move from zero to infinity reading

#15📘 EE Pocket Reviewer RojasEasy

Shunts in ammeter are made from which of the following materials?

ACopper

BSilver

CAluminum

DManganin

#16📘 EE Pocket Reviewer RojasEasy

In a two-wattmeter method, the algebraic sum of the readings of two wattmeters will indicate true power if.

AThe load is balanced

BThere is no source unbalance

CPhase sequence remains the same

DNeutral wire available does not carry any current

#17📘 EE Pocket Reviewer RojasEasy

How many wattmeters are needed to measure the unbalanced power of a three-phase system?

AExactly two wattmeters

BOnly one wattmeter

CExactly three wattmeters

DTwo or three wattmeters, depending on the connection method used

#18📘 EE Pocket Reviewer RojasEasy

What is the minimum number of wattmeters required in measuring the power consumed by a balanced three-phase loads?

AExactly two wattmeters

BOne wattmeter only

CAt least two wattmeters

DThree wattmeters

#19📘 EE Pocket Reviewer RojasEasy

In order to measure power in a 3-phase, 4-wire unbalanced load, determine the number of wattmeters needed?

AOnly one

BTwo

CThree

DFour

#20📘 EE Pocket Reviewer RojasEasy

What is the reason why “three-wattmeter method” is not normally used to measure power in a three-phase circuit?

AIt is a complicated connection

BIt requires three wattmeters

CThe neutral is not available

DThe load is unbalanced

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