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MCQs 1: The potential transformers are used to measure large voltage using

High range voltmeter Low range voltmeter High range ammeter Low range ammeter
Answer Explanation

MCQs 2: If an instrument transformer is used to extend the ranges of AC instrument, then its reading will depend on

R L C All of these None of these
Answer Explanation

MCQs 3: If the displacement is measured with strain gauge then the number of strain gauge normally required are

One Two Three Four
Answer Explanation

MCQs 4: A capacitive pressure sensor has a typical measurement uncertainty of

± 0.2% ± 0.4% ± 0.1% ± 0.8%
Answer Explanation

MCQs 5: The instruments used for the measurement of pressure is / are

Bellows Diaphragms Fiber optic pressure sensors All of these None of the above
Answer Explanation

MCQs 6: LVDT which is an instrument for the measurement of displacement, works on the principal of

Linear inductance Non - linear inductance Mutual inductance Linear capacitance
Answer Explanation

MCQs 7: In rotary variable differential transformer, the mutual inductance between the primary and secondary coils varies

Linearly with the angular displacement Non - linearly with the angular displacement Linearly with the linear displacement Non - linearly with the linear displacement
Answer Explanation

MCQs 8: Resolver works on the principal of mutual inductance variation. It is mainly used for the measurement of

Linear displacement Non - linear displacement Rotary motion All of these
Answer Explanation

MCQs 9: In light emitting diode, the available light emitting region is

Less than 2.5 mm From 2.5 to 25 mm Greater than 25 mm Greater than 50 mm
Answer Explanation

MCQs 10: In liquid crystal displays, the liquid crystal exhibits properties of

Liquid Solids Gases Both (a) and (b)
Answer Explanation

MCQs 11: If the quantity to be measured remains constant during the process of taking the repeated measurements then the random errors can be eliminated by

Calculating the mean of the number of repeated measurements Calculating the median of the number of repeated measurements Calculating the sum of the numbers of repeated measurements Either (a) or (b)
Answer Explanation

MCQs 12: The error between mean of finite data set and mean of infinite data set is known as

True error of the mean Standard error of the mean Finite error Infinite error
Answer Explanation

MCQs 13: In a measurement system,

A single measurement components may have both random errors and systematic errors A measurement system consists of several components with each component having separate errors Both the statement (a) & (b) are true Neither statement (a) nor statement (b) is true
Answer Explanation

MCQs 14: When a 100 V moving iron voltmeter is of accuracy class 1 - 0 is used in a circuit, it reads 50 V. Then the maximum possible percentage error in the reading is

1 % 2 % 2.5 % 3 %
Answer Explanation

MCQs 15: If the two voltage measurements are V1 = 150 ± 2% and V2 = 100 ± 4% respectively. Then the maximum percentage error in the sum of two voltage measurements is

± 2.4 % ± 2.6 % ± 2.8 % ± 3.4 %
Answer Explanation

MCQs 16: If the resistance in a circuit is given by 80 Ω ± 0.2% and the current flowing through it is 5A ± 0.1%, then the uncertainty in the power will be

± 0.2 % ± 0.4 % ± 0.6 % ± 0.8 %
Answer Explanation

MCQs 17: While measuring resistance by the voltmeter - ammeter method, the maximum possible percentage error in the voltmeter and ammeter are ± 1.8% and ± 1.2% respectively. Then the maximum possible percentage error in the value of resistance will be

± 3% ± 4% ± 4.2% ± 4.8%
Answer Explanation

MCQs 18: If the degree of damping of an instrument should be adjusted to a value which is sufficient to enable the pointer to rise quickly to its deflected position without overshooting is called as

Overdamped Dead beat Underdamped None of these
Answer Explanation

MCQs 19: Due to overdamping, the instrument will become

Slow Lethargic Fast Both (a) and (b)
Answer Explanation

MCQs 20: Electrostatic instruments are generally used as

Voltmeters Ammeters Wattmeters Watt-hour meters
Answer Explanation

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