Electrical Engineering · Question Bank

Instruments & Measurements

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

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TypeAll 94Problem solving 17Objective 77
DifficultyAll 94Easy 91Medium 3Hard
#81📘 EE Pocket Reviewer RojasEasy
Which of the following type of meter movement is considered the best type?
AD'Arsonval type
BThermocouple type
CIron-vane type
DDynamometer type
#82📘 EE Pocket Reviewer RojasEasy
Which of the following statements is true about the internal resistance of a measuring instrument?
AThe internal resistance of an ammeter and a voltmeter should be very low
BThe internal resistance of an ammeter should be very low while that of a voltmeter should be very high
CThe internal resistance of an ammeter should be very high while that of a voltmeter should be very low
DThe internal resistance of an ammeter and a voltmeter should be very high
#83📘 EE Pocket Reviewer RojasEasy
What is the purpose of providing a mirror behind the pointer in a measuring instrument?
AThe scale of the instrument is illuminated through the mirror
BThe mirror will help to visually investigate the condition of the pointer of the instrument
CThe mirror is used to protect the internal wiring of the instrument
DReading errors due to inclined observation is eliminated with the help of the mirror
#84📘 EE Pocket Reviewer RojasEasy
The pointer of an indicating instrument is made from which of the following materials?
ACopper
BSilver
CAluminum
DSoft iron
#85📘 EE Pocket Reviewer RojasEasy
What is the function of the zero-adjust control in a multi-meter?
AThe zero point is corrected using this control
BIt is used to change the sensitivity of the meter
CIt is used to tighten or loosen the pointer of the meter
DIt serves to conduct the current
#86📘 EE Pocket Reviewer RojasEasy
What do you mean by threshold of sensitivity of a measuring instrument?
AThe maximum signal which can be measured
BThe value of sensitivity of the highest scale
CThe value of sensitivity on the lowest scale
DThe smallest signal that results in a detectable output
#87📘 EE Pocket Reviewer RojasEasy
What is the main reason for using springs in a measuring instrument?
ATo control the pointer movement
BTo conduct the current to the coils
CTo hold the pivot in position
DTo reduce the vibration of the pointer
#88📘 EE Pocket Reviewer RojasEasy
To reduce the effect of a voltmeter on a circuit under test, which of the following should be done first?
ADecrease the multiplier resistance
BUse an ac voltmeter
CUse a voltmeter with a high internal resistance
DConnect a parallel resistor across the voltmeter
#89📘 EE Pocket Reviewer RojasEasy
Which of the following cannot be indicated by an oscilloscope?
AFrequency
BWave shape
CPeak signal voltage
DEnergy
#90📘 EE Pocket Reviewer RojasEasy
In an induction type ammeter, which of the following damping methods is used?
AAir friction
BEddy current
CFluid friction
DSpring type
#91📘 EE Pocket Reviewer RojasEasy
Electrostatic instruments are used as which of the following instruments?
AVoltmeters only
BAmmeter only
CWattmeter only
DBoth voltmeters and ammeters
#92📘 EE Pocket Reviewer RojasEasy
The meter accuracy is determined by which of the following deflections?
AFull-scale deflection
BZero-scale deflection
CMiddle-scale deflection
DNear full-scale deflection
#93📘 EE Pocket Reviewer RojasEasy
Which of the following meters is the most sensitive?
A50 mA
B50 µA
C100 pA
D1 pA
#94📘 EE Pocket Reviewer RojasEasy
Which of the following instruments are the most sensitive?
AMoving-iron meter
BDynamometer
CHot-wire meter
DPermanent-magnet moving coil meter

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