This set of Instrumentation Transducers Multiple Choice Questions & Answers (MCQs) focuses on “Digital Transducers”.
1. Which of the following is correct for a digital transducer?
a) Measures digital quantity only
b) Gives digital output
c) Doesn’t measure analog input
d) None of the mentioned
View Answer
Explanation: A digital transducer is a device which gives output in digital form.
2. LDE is used for measuring ____________
a) Linear acceleration
b) Angular acceleration
c) Linear displacement
d) Linear acceleration
View Answer
Explanation: Linear digital encode or LDE is used for measuring linear displacement.
3. Datums are used for ___________
a) Obtaining digital output
b) Converting analog data to digital data
c) Storing data
d) Displaying output
View Answer
Explanation: Datums are used in incremental transducers which will consider previous data for display.
4. Absolute encoders require data.
a) True
b) False
View Answer
Explanation: Absolute encoders show the output for the present input only, and it doesn’t store any previous data.
5. Which of the following is not an encoder?
a) Optical encoders
b) Magnetic encoders
c) Angular digital encoders
d) None of the mentioned
View Answer
Explanation: Different types of encoder devices are available according to their operating medium.
6. Why positive feedback is used in a pressure transducer?
a) To improve stability
b) To maintain stability constant
c) To maintain vibratory motion
d) None of the mentioned
View Answer
Explanation: Positive feedback in the vibrating diaphragm is used to maintain vibratory motion in diaphragm.
7. VDP is used for measuring pressure ____________
a) Less than 1 atmosphere
b) Between 1 and 100 atmosphere
c) Above 1000 atmosphere
d) All of the mentioned
View Answer
Explanation: Pressure range between 1 and 100 atmosphere are measured using vibrating diaphragm pressure transducer.
8. In vibrating tube gas transducer, Pressure difference across wall is varying.
a) True
b) False
View Answer
Explanation: Pressure difference across walls of tube in vibrating tube gas density transducer is always kept constant to measure the density of liquid.
9. In vibrating string transducer output frequency is depended on the length of spring by ________
a) Direct proportionality
b) Inverse proportionality
c) Equal
d) None of the mentioned
View Answer
Explanation: Output frequency decreases as the length of string is increased and they are inversely proportional.
10. Density of flowing liquid can be measured using____________
a) Vibrating tube transducer
b) Vibrating cylinder transducer
c) Both vibrating tube and cylinder transducer
d) None of the mentioned
View Answer
Explanation: Only vibrating tube transducer allow flow of liquid and they can be used for measurement of the density of flowing liquid.
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