Electronics and Instrumentation General Knowledge Quiz | Electronics and Instrumentation General Knowledge Objective Type Questions & Answers

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Questions
21 Most commonly used indicator electrode is
A Glass electrode
B Silver – Silver chloride electrode
C Calomel electrode
D Silver electrode

Answer: Glass electrode
22 Test electrode is also known as
A Indicator electrode
B Reference electrode
C Second electrode
D Primary electrode

Answer: Indicator electrode
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23

S1: In multimode fiber optics, intensity modulating schemes can be employed.

S2: Schemes using polarizing techniques need birefringent fiber.

A S1 is true and S2 is false
B Both S1 and S2 are true
C S1 is false and S2 is true
D Both S1 and S2 are false

Answer: Both S1 and S2 are true
24 Photo conductive cell consists of a thin film of
A Selenium
B Barium titanate
C Quartz
D Lithium sulphate

Answer: Selenium
25 In foil strain gauge the thickness of foil varies from
A 2.5 micron to 6 micron
B 2.5 micron to 5 micron
C 25 micron (or) less
D 25 micron to 60 micron

Answer: 2.5 micron to 6 micron
26 The change in resistance of a metal wire owing to strain is due to

S1: Change in dimension of wire expressed by factor (1-2µ)

S2: Change in resistance ??

A S1 is true & S2 is false
B S2 is true & S1 is false
C Both S1 & S2 are true
D Both S1 & S2 are false

Answer: S2 is true & S1 is false
27 Pressure transducer for measuring blood pressure is
A Strain gauge transducer only
B Strain gauge or capacitive transducer
C Resistive transducer
D Fiber optic transducer

Answer: Strain gauge or capacitive transducer
28 Venturi is associated with
A Venous blood pressure
B Digital plethysmography
C Dialysate flow in artificial kidney
D Blood flow in heart lung machine

Answer: Blood flow in heart lung machine
29 The application of LVDT is
A Joint motion
B Finger movement
C Limb movement
D Heart wall motion

Answer: Limb movement
30 The principle of operation of variable resistance transducer is
A Deformation leads to change in resistance
B Displacement of a contact slider on a resistance
C Coupling of two coils changes with displacement
D Movement of magnetic field produces variation in resistance of material

Answer: Displacement of a contact slider on a resistance
31 The transducers which requires an external power and their output is a measure of some variation such as resistance, inductance, capacitance etc., are called as
A Active transducer
B Primary sensor
C Passive transducer
D Self generating transducer

Answer: Passive transducer
32 Pick the correct statement regarding functions of a transducer

S1: Sense the magnitude, change in & / or frequency of same measurand

S2: To provide electrical output that furnishes accurate, quantitative data about the measurand

A S1 is true & S2 is false
B S2 is true & S1 is false
C Both S1 & S2 are true
D Both S1 & S2 are false

Answer: Both S1 & S2 are true
33 Capacitive transducers are normally employed for___________ measurements
A Static
B Dynamic
C Transient
D Both static and dynamic

Answer: Dynamic
34 In a LVDT, the two secondary voltages
A Are independent of the core position
B Vary unequally depending on the core position
C Vary equally depending on the core position
D Are always in phase quadrature

Answer: Vary unequally depending on the core position
35 S1: Transducer is a device which converts physical into electrical quantity S2: Transducer is also called as sensor.
A S1 is true & S2 is false
B S2 is true & S1 is false
C Both S1 & S2 are true
D Both S1 & S2 are false

Answer: S2 is true & S1 is false
36 Which of the following can be measured with the help of piezo electric crystal?
A Force
B Velocity
C Sound
D Pressure

Answer: Force
37 LVDT is an/a ___________ transducer
A Eddy current
B Resistive
C Magneto-strict ion
D Inductive

Answer: Eddy current
38 _____________ is the example of photo emissive cell
A LDR
B Photo diode
C Photo transistor
D Photo multiplier

Answer: LDR
39 pH value of venous blood is
A 7.30
B 7.40
C 7.35
D 7.45

Answer: 7.35
40 Silver chloride electrode is used as a reference electrode due to its
A Large half cell potential
B Stable half cell potential
C Stable resting potential
D Stable action potential

Answer: Stable half cell potential

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