ESE EE : Measurements National Champion Test for ESE & GATE EE Exams

Question 1

The imperfect capacitance which is shunted by a resistance can be measured by which one of the following ?

Question 2

Dissipation factor, tan

, of a capacitor is measured by which bridge?

Question 3

Inductance is measured by which one of the following?

Question 4

The measurement of frequency can be carried out with

Question 5

The dielectric loss of a capacitor can be measured by which one of the following?

Question 6

Match list-| with List-|| and select the correct answer using the code given below the lists:
List-|
A) Mutual inductance
B) High-Q inductance
C) Audio frequency
D) Dielectric loss
List-||
1) Wien-bridge
2) Schering-bridge
3) Hay bridge
4) Heaviside-campbell bridge

Question 7

Statement (|) : In the Kelvin double-bridge method, provision has been made to eliminate the errors due to contact and lead resistances.
Statement (||) : The Schering bridge is used for measuring small capacitance at low voltages with very precision.

Question 8

Match List-I (Type of Electronic Voltmeter) with List-II (Major Characteristic) and select the correct answer using the code given below the lists:
List-I
A) Amplifier-rectifier dynamic range
B) Rectifier-amplifier
C) True R.M.S.
D) Logarithmic
List-II
1) Wide input-signal
2) High sensitivity, limited bandwidth
3) Limited sensitivity, large bandwidth
4) Capability to read non-sinusoidal ac

Question 9

Match List-I (Instrument) with List-II (Error) and select the correct answer using the code given below the lists:
List-I
A) PMMC voltmeter
B) AC ammeter
C) Current transformer
D) Energy meter
List-II
1) Eddy current error
2) Phase angle error
3) Braking system error
4) Temperature error

Question 10

When reading is taken under the measurement one time, at half scale of the instrument, the error is

Question 11

What should be the main characteristic(s) of the null detector in a bridge measurement?
1) Accuracy
2) Precision
3) Sensitivity
4) Resolution
Select the correct answer using the code given below:

Question 12

Which of the following indicating instruments has/have linear scale?
1) Moving-iron meter
2) Permanent magnet moving-coil meter
3) Thermocouple meter
4) Electro-dynamometer instrument
Select the correct answer using the code given below:

Question 13

Assertion (A): The flux densities used in PMMC instruments vary from 0.1 T 1.0 T.
Reason (R): The power requirement for PMMC movement to give full scale deflection is small ranging from 25μW to 200μW.

Question 14

Which of the following factors limit the deflection of the pointer of a PMMC instrument to about 90^o?
1) Its damping mechanism
2) Linearity of the magnetic field in which the coil moves
3) Control spring arrangement
4) Shape of the pole shoe of the horseshoe magnet
Select the correct answer using the code given below:

Question 15

Assertion (A): The precision instruments are always accurate.
Reason (R): Precision indicates the degree of agreement within a set of measurements of the same quantity by the instrument, and accuracy refers to the degree of closeness to the true value of the quantity to be measured.

Question 16

Which one of the following defects is responsible for creeping in an inducting type energy meter?

Question 17

Which one of the following is the correct statement?
Due to inductance in the pressure coil, the dynamometer wattmeter

Question 18

In a low power factor wattmeter, why is a compensating coil employed?

Question 19

A 100 kV, 50 Hz supply is fed to a rectifier ammeter (using a bridge rectifier) through a capacitor. The PMMC ammeter of the rectifier instrument read

Amp. What is the value of the capacitor?

Question 20

How can the power supplied to a high frequency heating system be measured?

Question 21

A basic D’Arsonval movement with a full scale deflection of 50 μA and internal resistance of 500

is used as voltmeter. The value of the multiplier resistance needed to employ this meter to measure a voltage range of (0 - 10) V is given by

Question 22

What is clamp-on ammeter used for?

Question 23

Guard circuits are used in insulation resistance measurements to

Question 24

A sinusoidal voltage of 1 V rms value at 10 Hz is applied across the two terminals of a PMMC type of voltmeter. What is the deflection of pointer?

Question 25

To measure 5 volts, if one selects a (0-100) volt range voltmeter which is accurate within ±1%, then the error in this measurement may be up to

Question 26

In the power measurement by ammeter-voltmeter method, if the voltmeter is connected across the load, then the value of the power will be

Question 27

Chopper stabilized d.c. amplifier type electronic voltmeter overcomes the effect of

Question 28

In a CRO astigmatism is

Question 29

Match List-i (type of Digital Voltmeter) with List-ii (Its construction features) and select the correct answer using the code given below the lists:
List-i
A) Basic ramp type DVM
B) Staircase-ramp type DVM
C) Integrating type DVM
D) Continuous balance type DVM
List-ii
1) Uses D/A converter
2) True average value of input voltage using voltage frequency converter
3) Servo-driven potentiometer is commonly used
4) Does not use D/A converter

Question 30

A successive approximation A/D converter has a resolution of 20 mv. What is its digital output for an analog input of 2.17 V?