Electronics and Instrumentation Quiz | Electronics and Instrumentation Multiple Choice Questions(MCQs) & Answers
Questions
1
The size of air cored transducers in comparison to the iron core parts is
Answer: Larger
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3
The draw backs of strain gauges are
S1: Low fatigue life
S2: They are expensive, brittle and sensitive to temperature
S3: Poor linearity
Answer: S2 and S3
4
Piezo electric crystal can produce an emf
Answer: When external mechanical force is applied to i
5
Piezo – electric transducers work when we apply _____________ to it.
Answer: Heat
7
Quartz and Rochelle salt belongs to ___________ of piezo-electric materials
Answer: Natural group
8
Certain type of materials generates an electrostatic charge or voltage when mechanical force is applied across them. Such materials are called
Answer: Piezo-electric
9
Bonded wire strain gauges are
Answer: Used for both stress analysis and construction of transducer
10
In wire wound strain gauges, the change in resistance is due to
Answer: Change in both length and diameter
11
The sensitivity factor of strain gauge is normally of the order of
Answer: 1.5 to 2.0
13
A strain gauge is a passive transducer and is employed for converting
Answer: Mechanical displacement into a change of resistance
14
An inverse transducer is a device which converts
Answer: An electrical quantity into a non electrical quantity
15
Strain gauge, LVDT and thermocouple are examples of
Answer: Analog transducers
17
A transducer that converts measurand into the form of pulse is called
Answer: Pulse transducer
18
The transducers that converts the input signal into the output signal, which is a discrete function of time is known as ___________ transducer.
Answer: Digital
19
Self generating type transducers are ___________ transducers.
Answer: Active
20
The principle of operation of LVDT is based on the variation of
Answer: Mutual inductance
