MCQOPTIONS

Explore topic-wise MCQs in Sensors And Industrial Instrumentation.

This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Sensors And Industrial Instrumentation knowledge and support exam preparation. Choose a topic below to get started.

1.	Moiré fringes are used to measure rotary displacement along with ________.
A.	contact type encoders only
B.	optical encoders only
C.	contact type encoders and optical encoders
D.	none of these
Answer» C. contact type encoders and optical encoders

2.	It converts a non-electrical physical quantity to an electrical quantity?
A.	Converter
B.	Inverter
C.	Transducer
D.	Compiler
Answer» D. Compiler

3.	LVDT has-
A.	One primary coil and two secondary coils
B.	Two primary coils and one secondary coil
C.	One primary coil and one secondary coil
D.	Two primary coils and two secondary coils
Answer» B. Two primary coils and one secondary coil

4.	Electrical voltage-based telemetering schemes used for short distances must necessarily have
A.	low current level only
B.	small signal power only
C.	high signal to noise ratio \(\left( {\frac{S}{N} \gg 2} \right)\)only
D.	All of the above
Answer» E.

5.	An optical encoder is
A.	a means of isolating voltages between computer and power supply system
B.	a component of a stepper motor system
C.	a position transducer
D.	primarily a velocity transducer from which position can be determined by investigation
Answer» D. primarily a velocity transducer from which position can be determined by investigation

6.	A differential transformer(A) is a differential voltage of two secondary windings of a transformer is varied by positioning the magnetic core through an externally applied force(B) is used for pressure measurement(C) is used for force measurement(D) is used for displacement measurement(E) is used for position measurementChoose the correct answer from the options given below :
A.	(A) only
B.	(B) only
C.	(C) only
D.	(A), (B), (C), (D), (E) only
Answer» B. (B) only

7.	Directions: It consists of two statements, one labelled as the ‘Statement (I)’ and the other as ‘Statement (II)’. Examine these two statements carefully and select the answers to these items using the codes given below:Statement (I):RF voltage is measured by rectifying the alternating voltage first and then amplifying the resulting dc output.Statement (II):Amplification of RF signal itself is very difficult.
A.	Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I)
B.	Both Statement (I) and Statement (II) are individually true but Statement (II) is not the correct explanation of Statement (I)
C.	Statement (I) is true but Statement (II) is false
D.	Statement (I) is false but Statement (II) is true
Answer» B. Both Statement (I) and Statement (II) are individually true but Statement (II) is not the correct explanation of Statement (I)

8.	A device that transforms one from of energy to another is called:
A.	Transistor
B.	Transducer
C.	Transformer
D.	Transmitter
Answer» C. Transformer

9.	Choose the INCORRECT statement with respect to the use of electrical transducers.
A.	The output can be indicated and recorded remotely at a distance from the sensing medium.
B.	Electrical amplification and attenuation can be easily done.
C.	Effects of friction are minimised.
D.	Mass-inertia effects are maximised.
Answer» E.

10.	Consider the following transducers:1. LVDT2. Piezoelectric3. Thermocouple4. Photovoltaic cellWhich of the above are active transducers?
A.	1, 2 and 3
B.	1, 2 and 4
C.	2 and 3 only
D.	2, 3 and 4
Answer» E.

11.	In a digital data acquisition system, a scanner-multiplexer
A.	scans the printed diagram and converts it into digital data
B.	accepts multiple digital inputs and output any one of them with select lines
C.	accepts multiple analog inputs and sequentially connects them to an ADC
D.	cheeks the correct functioning of the modules one by one
Answer» D. cheeks the correct functioning of the modules one by one

12.	In data acquisition system, analog data acquisition system is used
A.	for narrow frequency width, while digital data acquisition system is used when wide frequency width is to be monitored
B.	for wide frequency width, while digital data acquisition system is used when narrow frequency width is to be monitored
C.	when quantity to be monitored varies slowly, while its counterpart is preferred if the quantity to be monitored varies very fast
D.	when quantity to be monitored is time-variant, while digital data acquisition system is preferred when quantity is time-invariant
Answer» C. when quantity to be monitored varies slowly, while its counterpart is preferred if the quantity to be monitored varies very fast

13.	Electrical positional system tele metering used for transmission of signal in
A.	two wires only
B.	two or three wires only
C.	two or three or four wires only
D.	two or three or four or even five wires
Answer» D. two or three or four or even five wires