Instruments & Measurements Practice Questions with Solutions – Electrical Engineering (Page 3)

#41📘 EE Pocket Reviewer RojasEasy

Which of the following instruments detects small electric currents?

AGalvanometer

BPotentiometer

CVoltmeter

DWattmeter

#42📘 EE Pocket Reviewer RojasEasy

A multi-meter is a multi-instrument. What are they?

AVoltmeter and an ammeter

BOhmmeter and a megger

CVoltmeter, an ammeter, and an ohmmeter

DWattmeter and a voltmeter

#43📘 EE Pocket Reviewer RojasEasy

Moving-coil instruments have what type of scale?

AUniform scale

BLogarithmic scale

CSquared scale

DExponential scale

#44📘 EE Pocket Reviewer RojasEasy

Which of the following is true about a voltmeter?

AIts internal resistance must be high

BIt has the ability to withstand large currents

CIt has the greatest possible sensitivity

DAll of these

#45📘 EE Pocket Reviewer RojasEasy

When using any electrical instrument for measurement, which of the following should be considered first?

ATheoretical knowledge about the instrument

BPersonal safety of the person using it

CCost of the instrument

DAccuracy class of the instrument

#46📘 EE Pocket Reviewer RojasEasy

Dynamometer type instruments can be used for which type of circuits?

ADC circuits

BAC circuits

CBoth DC and AC circuits

DCombination of DC and AC circuits

#47📘 EE Pocket Reviewer RojasEasy

In a meter, what is the purpose of damping? 13

AIt provides a braking action on a meter pointer

BIt provides good accuracy to the meter

CIt provides a starting torque on the meter

DIt provides a counter torque to deflection torque

#48📘 EE Pocket Reviewer RojasEasy

Which of the following statement is a precaution in checking resistors with an ohmmeter?

ACheck high resistance on the lowest ohms range 13

BCheck low resistance on the highest ohms range

CDisconnect all parallel resistance paths

DCheck high resistance with your fingers touching the leads

#49📘 EE Pocket Reviewer RojasEasy

A short circuit maybe measured by which of the following devices?

AAmmeter or megger

BDynamometer or megger

CVoltmeter or megger

DAmmeter or ohmmeter

#50📘 EE Pocket Reviewer RojasEasy

Which meter is suitable only for direct current measurements?

AMoving-iron type

BPermanent-magnet type

CHot-wire type

DElectrodynamic type

#51📘 EE Pocket Reviewer RojasEasy

Two meters rated 10 mA and 50 mA at full deflections. Which one is more sensitive?

A10 mA

B50 mA

CBoth of them, since measurement is in mA

DNone of these, since sensitivity is not judged by full deflection current

#52📘 EE Pocket Reviewer RojasEasy

To measure high frequency currents, which type of ammeters is used?

ADynamometer

BThermocouple

CHot-wire

DMoving-iron

#53📘 EE Pocket Reviewer RojasEasy

What is measured in an electric pyrometer instrument?

AHigh temperature

BPhase sequence

CFrequency

DPower factor

#54📘 EE Pocket Reviewer RojasEasy

Which one is true about a megger?

AIt is a hand-cranked ac generator

BIt is a hand-cranked dc generator

CIt is a meter to measure low power factor

DIt is a meter to measure high current

#55📘 EE Pocket Reviewer RojasEasy

Which of the following meter movements is the most expensive?

AD’Arsonval movement

BDynamometer

CMoving-iron

DNone of these

#56📘 EE Pocket Reviewer RojasEasy

Which of the following is used to increase the range of a voltmeter?

AA low resistance is connected in series

BA high resistance is connected in parallel

CA low resistance is connected in parallel

DA high resistance is connected in series

#57📘 EE Pocket Reviewer RojasEasy

On a simple ohmmeter, the zero-ohm mark is located where on the scale?

AFar left

BFar right

CIn the middle

DNone of these

#58📘 EE Pocket Reviewer RojasEasy

Which one is an advantage of an electrostatic meter?.

AIt can measure very small currents

BIt can handle large currents

CIt can detect ac as well as dc voltages

DIt draws large current from the supply

#59📘 EE Pocket Reviewer RojasEasy

What type of voltage can be measured by an electrodynamic voltmeter?

ADC voltage only

BAC voltage only

CBoth DC and AC voltages

DNone of these

#60📘 EE Pocket Reviewer RojasEasy

What is a “multiplier” in a voltmeter?

AIt is a high resistance in series with the meter

BIt is a low resistance in parallel with the meter

CIt is a current transformer

DIt is a variable capacitor

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