R4RIN – MCQs, Mock Tests | Electrical measurements Electrical Measurement MCQ Question Set 15

Proper bonding causes errors in strain gauges.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

Strain gauges are classified into ________

1. 3 types
2. 5 types
3. 7 types
4. 9 types

✅ Correct Answer: 1

Resistance wire gauges come in _______

1. 4 forms
2. 2 forms
3. 6 forms
4. 8 forms

✅ Correct Answer: 2

Bonded resistance wire strain gauge is of _______

1. 7 types
2. 5 types
3. 3 types
4. 9 types

✅ Correct Answer: 3

Commonly used electrical strain gauge is _______

1. open type
2. closed type
3. unbounded type
4. bonded type

✅ Correct Answer: 4

Electrical strain gauges measure changes in _______

1. resistance, capacitance and inductance
2. resistance only
3. capacitance only
4. inductance only

✅ Correct Answer: 1

Mechanical gauges measure the _______

1. change in resistance
2. change in length
3. change in area
4. change in inductance

✅ Correct Answer: 2

Optical gauges make use of _______

1. pulleys
2. electricity
3. mirrors
4. rack and pinion

✅ Correct Answer: 3

Tensile stress decreases the length.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

In a foil strain gauge, strain is detected through _______

1. a capacitance element
2. a resistance wire
3. a gold foil
4. a metal foil

✅ Correct Answer: 4

Etched foil strain gauges are flexible.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

Gauge factor in a strain gauge must be ______

1. high
2. low
3. medium
4. small

✅ Correct Answer: 1

Strain gauges are used for ______

1. small scale measurements
2. dynamic measurements
3. static measurements
4. large scale measurements

✅ Correct Answer: 2

Resistance of the strain gauge must be _____

1. zero
2. small
3. large
4. medium

✅ Correct Answer: 3

Strain gauge has a ______

1. tangential
2. exponential
3. non-linear
4. linear

✅ Correct Answer: 4

Strain gauge has a _______

1. low temperature coefficient of resistance
2. high temperature coefficient of resistance
3. zero temperature coefficient of resistance
4. infinite temperature coefficient of resistance

✅ Correct Answer: 1

Semiconductor strain gauges are used for _______

1. low gauge factor values
2. high gauge factor values
3. zero gauge factor value
4. infinite gauge factor value

✅ Correct Answer: 2

Strain gauge works on the principle of _______

1. piezo-electric effect
2. barkhausen criterion
3. piezo- resistive effect
4. feedback element effect

✅ Correct Answer: 3

In metallic gauges resistance changes due to _______

1. temperature
2. current
3. voltage
4. dimension

✅ Correct Answer: 4

Gauge factor for a semiconductor strain gauge is _______

1. 130 ± 10%
2. 30 ± 10%
3. 200 ± 10%
4. 10 ± 10%

✅ Correct Answer: 1

Hysteresis characteristics of a semiconductor strain gauge are poor.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

Strain gauge measurement involves _______

1. Wheatstone bridge
2. Kelvin bridge
3. De Sauty’s bridge
4. Anderson bridge

✅ Correct Answer: 1

Load cell is used for the measurement of _______

1. area
2. force
3. mass
4. length

✅ Correct Answer: 2

Strain is a ______

1. fractional change in volume
2. fractional change in area
3. fractional change in length
4. fractional change in height

✅ Correct Answer: 3

Semiconductor strain gauge uses _______

1. rectifier circuitry
2. power electronics circuitry
3. ordinary bridge circuit
4. bridge circuit with temperature compensation

✅ Correct Answer: 4

A semiconductor strain gauge consists of how many dummy gauges?

1. 2
2. 4
3. 6
4. 10

✅ Correct Answer: 1

Metals in strain gauge construction have _______

1. non-linear temperature coefficient
2. linear temperature coefficient
3. tangential temperature coefficient
4. exponential temperature coefficient

✅ Correct Answer: 2

A Wheatstone bridge has _______

1. low sensitivity
2. zero sensitivity
3. high sensitivity
4. infinite sensitivity

✅ Correct Answer: 3

Load cells are calibrated such that _______

1. force varies inversely with resistance
2. force varies as the square of resistance
3. force remains constant with resistance
4. force varies directly with resistance

✅ Correct Answer: 4

Load cell is sensitive to minute strains.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

Mass of only about 20 kg can be measured by a load cell.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

Resistance temperature detector is _____

1. a electrical transducer
2. a mechanical transducer
3. a chemical transducer
4. a physical transducer

✅ Correct Answer: 1

Relation between temperature and resistance of a conductor is ________

1. Rt = Rref [1+t]
2. Rt = Rref [1+α∆t]
3. Rt = Rref [1-αt]
4. Rt = Rref [1-t]

✅ Correct Answer: 2

Sensing element in the thermometer must provide ________

1. small change in resistance
2. no change in resistance
3. large change in resistance
4. infinite change in resistance

✅ Correct Answer: 3

Platinum is used for industrial applications because ______

1. it is cheap
2. it is available readily
3. it is a noble metal
4. it gives accurate measurements

✅ Correct Answer: 4

Resistance thermometer provides the change in electrical resistance.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

If the sensing element is large, then less amount of heat is required.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

Most metallic conductors have a ______

1. neutral temperature coefficient of resistance
2. negative temperature coefficient of resistance
3. positive temperature coefficient of resistance
4. zero temperature coefficient of resistance

✅ Correct Answer: 3

In a temperature sensing element _____

1. low value of α is required
2. infinite value of α is required
3. α must be zero
4. high value of α is required

✅ Correct Answer: 4

Nickel and its alloys can be used over a temperature range of _____

1. 100 to 450 K
2. 10 to 50 K
3. 0 to 25 K
4. 5 to 15 K

✅ Correct Answer: 1

How can corrosion be prevented in a resistance thermometer?

1. by immersing the setup in oil
2. by enclosing the elements in a glass tube
3. by using guard rings
4. by painting the elements

✅ Correct Answer: 2

Thermistor is a contraction ______

1. thermal resistor
2. laser resistor
3. electric resistor
4. mechanical resistor

✅ Correct Answer: 1

Thermistors have ______

1. positive temperature coefficient
2. negative temperature coefficient
3. zero temperature coefficient
4. infinite temperature coefficient

✅ Correct Answer: 2

Thermistor has a resistance of ____

1. 250 ῼ to 500 kῼ
2. 50 ῼ to 10 kῼ
3. 1 ῼ to 1 kῼ
4. 100 ῼ to 100 kῼ

✅ Correct Answer: 2

Thermistors are suited for precision temperature measurements.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

Change in resistance is measured using a _______

1. Anderson’s bridge
2. Wheatstone’s bridge
3. Hay’s bridge
4. Maxwell’s bridge

✅ Correct Answer: 2

Thermistor material is pressed _____

1. under zero pressure
2. under low pressure
3. under high pressure
4. under low volume

✅ Correct Answer: 3

Thermistor follows which law for small variations ________

1. Charle’s law
2. KVL
3. KCL
4. Ohm’s law

✅ Correct Answer: 3

At small values of voltage, a thermistor _____

1. reaches peak current slowly
2. reaches peak current immediately
3. does not reaches peak current
4. reaches peak current intermediately

✅ Correct Answer: 1

Thermistor has low resistance.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2