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ESE EC : Measurements & Instrumentation - National Champion Test
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Question 1
For controlling the vibration of the disc of an AC energy meter, damping torque is produced by
Question 2
Which one of the following is the best method of measurement of temperature of hot bodies radiating energy in visible spectrum?
Question 3
The true rms responding voltmeter senses
Question 4
Match List-i with List-ii and select the correct answer using the code given below the lists:
List-i
A- Chromel-Alumel
B- Iron-Constantan
C- Platinum-Rhodium
D- Copper-Constantan
List-ii
1. Long life and low thermal conductivity
2. Inexpensive and mechanically strong
3. Low sensitivity and high stability
4. Suitable for measurement below 0℃ and high reliability
Codes:
A B C D
List-i
A- Chromel-Alumel
B- Iron-Constantan
C- Platinum-Rhodium
D- Copper-Constantan
List-ii
1. Long life and low thermal conductivity
2. Inexpensive and mechanically strong
3. Low sensitivity and high stability
4. Suitable for measurement below 0℃ and high reliability
Codes:
A B C D
Question 5
The null balance potentiometric measurement of voltage technique is not capable of measuring
Question 6
For displaying high frequency signal cathode ray tube should have
Question 7
The different torques acting on a coil of a moving coil instrument are
Question 8
Which one of the following is correct? The generated emf of a tachogenerator is
Question 9
Which of the following meters cannot measure a.c. quantities?
Question 10
To increase the range of a voltmeter
Question 11
The best use of a resistance thermometer is in which range?
Question 12
In eddy current damping system, the disc employed should be of
Question 13
A current of 2.0 A passes through a cell of emf 1.5 V having internal resistance of 0.15 Ω. The potential difference across the terminals of the cell is
Question 14
Electrical positional system telemetering uses for transmission of signal in
Question 15
How can the resolution of a wire-wound potentiometer be improved?
Question 16
An ideal voltage source and an ideal voltmeter have internal impedances respectively
Question 17
Moving-coil permanent magnet instruments can be used for the measurement of
Question 18
The sine wave output of a function generator is fed to both the horizontal (X) and vertical (Y) inputs of a CRO, what will be the pattern on the cathode ray screen?
Question 19
A circle is found on the screen of a CRO when 2 time varying signals of same frequency and same magnitude are applied to X and Y plates of the CRO. What is the relative phase difference?
Question 20
When system noise is large and signal power is low in a telemetry system, what is the preferred form of modulation?
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May 17ESE & GATE EC