R4RIN – MCQs, Mock Tests | Electrical measurements Electrical Measurement MCQ Question Set 16

Pressure is the _____

1. force per unit area
2. mass per unit area
3. force per unit volume
4. mass per unit volume

✅ Correct Answer: 1

Pressure measurement devices make use of _____

1. non-elastic member
2. elastic member
3. bendable member
4. non-bendable member

✅ Correct Answer: 2

Output of electrical transducer is ____

1. inversely proportional to displacement
2. proportional to square of displacement
3. proportional to displacement
4. constant

✅ Correct Answer: 3

In general how many pressure sensitive devices are there?

1. 6
2. 20
3. 10
4. 4

✅ Correct Answer: 4

Diaphragms in a pressure sensor are of _____

1. 2 types
2. 5 types
3. 10 types
4. 20 types

✅ Correct Answer: 1

Temperature is the only consideration while selecting a diaphragm.

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

✅ Correct Answer: 2

Capsule type of pressure sensor consists of ______

1. 6 dissimilar diaphragms
2. 4 identical diaphragms
3. 2 identical diaphragms
4. 8 dissimilar diaphragms

✅ Correct Answer: 3

Bourdon tubes are ____

1. very highly sensitive to shock
2. not sensitive to shock
3. less sensitive to shock
4. more sensitive to shock

✅ Correct Answer: 4

Bellows have 5 to 20 convolutions.

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

✅ Correct Answer: 1

Sensitivity in a capsule is increased ______

1. through parallel connection of capsules
2. through series connection of capsules
3. through series and parallel connection of capsules
4. by not connecting them at all

✅ Correct Answer: 2

Mutual inductance depends on ______

1. self-inductance
2. self-inductance and coefficient of coupling
3. coefficient of coupling
4. permittivity of air

✅ Correct Answer: 2

Self-inductance of an inductor is given by _____

1. L = N⁄S
2. L = 1⁄S
3. L = N2⁄S
4. L = N2

✅ Correct Answer: 3

Reluctance of a coil is given by which of the following relation?

1. S = 1⁄A
2. S = 1⁄μ
3. S = a⁄μA
4. S = 1⁄μA

✅ Correct Answer: 4

Self-inductance depends on ______

1. permeability
2. permittivity
3. plank’s constant
4. rydberg constant

✅ Correct Answer: 1

What is the relation between the self-inductance and the reluctance of a coil?

1. directly proportional
2. inversely proportional
3. no relation
4. constant

✅ Correct Answer: 2

Based on self-inductance of a coil, how many types of inductive transducers are available?

1. 5
2. 10
3. 4
4. 20

✅ Correct Answer: 3

In an eddy current transducer output depends on the variation in the eddy current.

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

✅ Correct Answer: 1

An inductive transducer measures the variation in _____

1. reluctance
2. resistance
3. capacitance
4. self-inductance

✅ Correct Answer: 4

Inductive transducer is used for the measurement of physical quantities.

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

✅ Correct Answer: 1

A capacitive transducer works on the principle of ______

1. inductance
2. capacitance
3. resistance
4. reluctance

✅ Correct Answer: 2

Capacitance can be varied in ____

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

✅ Correct Answer: 4

Capacitive pressure transducer uses distance of separation for sensing the capacitance.

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

✅ Correct Answer: 1

Capacitive transducer displays ____

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

✅ Correct Answer: 2

Frequency response of capacitive transducers is ____

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

✅ Correct Answer: 3

What is the relation between capacitance and output impedance?

1. proportional to square
2. constant
3. directly proportional
4. inversely proportional

✅ Correct Answer: 4

What is the relation between capacitance and input impedance?

1. directly proportional
2. constant
3. proportional to square
4. inversely proportional

✅ Correct Answer: 1

Composite capacitance consists of _________

1. one dielectric medium
2. more than one dielectric medium
3. five dielectric media
4. ten dielectric media

✅ Correct Answer: 2

Thermoelectric transducer is a _____

1. temperature transducer
2. pressure transducer
3. inductive transducer
4. capacitive transducer

✅ Correct Answer: 1

Commonly used thermoelectric transducer is _____

1. thermometer
2. thermocouple
3. linear variable differential transducer
4. loud speaker

✅ Correct Answer: 2

The algebraic sum of e.m.f.s in a circuit containing thermocouples is ______

1. infinite
2. hundred
3. zero
4. ten

✅ Correct Answer: 3

What is a thermopile?

1. single thermocouple
2. series-parallel connection of thermocouples
3. parallel connection of thermocouples
4. series of thermocouples

✅ Correct Answer: 4

Chromel-constantan thermopile consists of 25 thermocouples.

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

✅ Correct Answer: 1

Thermocouple must provide _____

1. small thermo e.m.f
2. sufficient thermo e.m.f
3. no thermo e.m.f
4. infinite thermo e.m.f

✅ Correct Answer: 2

Most suitable material for a thermocouple is ______

1. brass
2. gold
3. platinum
4. silver

✅ Correct Answer: 3

If two different metals are joined forming a closed circuit an electric current flows.

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

✅ Correct Answer: 2

Which of the following should satisfy for measuring higher temperatures using a thermocouple?

1. no wire is required
2. wire must be small
3. wire must be thin
4. wire must be heavy

✅ Correct Answer: 4

For accurate temperature measurement in a thermocouple the _____

1. cold compensation is needed
2. hot compensation is needed
3. no compensation is needed
4. hot and cold compensations are needed

✅ Correct Answer: 1

Piezoelectric transducer is used for measuring ________

1. non-electrical quantities
2. electrical quantities
3. chemical quantities
4. any quantity

✅ Correct Answer: 1

Piezoelectric crystals _______

1. float on water
2. dissolve in water
3. are not soluble in water
4. absorb water

✅ Correct Answer: 2

Piezoelectric crystals produce ________

1. no voltage
2. low voltage
3. high voltage
4. very high voltage

✅ Correct Answer: 3

When a compressive force is applied to a quartz crystal then ________

1. positive charges are induced
2. negative charges are induced
3. no charge is induced
4. both positive and negative charges are induced

✅ Correct Answer: 1

In kitchen applications a piezoelectric crystal is used for _____

1. skimming milk
2. lighting a gas stove
3. grinding
4. mixing

✅ Correct Answer: 2

A piezoelectric transducer has a _____

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

✅ Correct Answer: 3

A piezoelectric transducer is used as an ignition source for a cigarette.

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

✅ Correct Answer: 1

Microphone converts light into heat.

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

✅ Correct Answer: 2

A quartz crystal is _______

1. a chemical transducer
2. a photoelectric transducer
3. not a self-generating transducer
4. a self-generating transducer

✅ Correct Answer: 4

Optical radiations involve ______

1. optoelectric devices
2. biological devices
3. mechanical devices
4. chemical devices

✅ Correct Answer: 1

Photoelectric transducers consist of _______

1. 1 transducer
2. 3 transducers
3. 5 transducers
4. 10 transducers

✅ Correct Answer: 2

Photoconductive transducers produce output ______

1. due to change in inductance
2. due to change in light
3. due to change in resistance
4. due to change in temperature

✅ Correct Answer: 3

Commonly used photoemissive material is _______

1. gold
2. opium
3. tellurium
4. cesium-antimony

✅ Correct Answer: 4