Instrumentation Transducers Questions and Answers – Chemical Sensors

This set of Instrumentation Transducers Questions and Answers for Entrance exams focuses on “Chemical Sensors”.

1. Which of the following change electrical conductivity on the absorption of a gas molecule?
a) Tin
b) Zinc
c) Nickel
d) All of the mentioned
View Answer

Answer: d
Explanation: Tin, Zinc and Nickel shows change in electrical conductivity on absorption of gas molecule on semiconductor surface.

2. Polypropylene is a/an _____________
a) Inorganic sensor
b) Organic sensor
c) Metal sensor
d) Gaseous sensor
View Answer

Answer: b
Explanation: Polypropylene is a type of organic sensor.

3. ISE stands for __________________
a) Ion sticking electrode
b) Ion selective electrode
c) Inactive segment electrode
d) Inorganic substance electrode
View Answer

Answer: b
Explanation: ISE is the short form of Ion selective electrode.
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4. Glass electrode is an ion selective electrode.
a) True
b) False
View Answer

Answer: a
Explanation: Glass electrode is used to measure pH which is the hydrogen ion activity.

5. Water purity is tested by ____________
a) Water activity sensor
b) pH meter
c) SAW sensor
d) BAW sensor
View Answer

Answer: b
Explanation: Purity of water is tested using pH meters.
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6. Heater power in thick film hybrid technology is __________
a) 5KW
b) 50 MW
c) 500 MW
d) 500 mW
View Answer

Answer: d
Explanation: Heater power in thick film hybrid technology is up to 500 mW.

7. Chemiresistor sensors are used for test gases in _______________
a) Solid form
b) Liquid form
c) Vapour form
d) All of the mentioned
View Answer

Answer: c
Explanation: If the test gas is in vapour form, chem resistor sensors are used.
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8. IR sensors are used in detection of _______________
a) Organic gases
b) Inorganic gases
c) Vapours
d) All of the mentioned
View Answer

Answer: d
Explanation: IR sensors can be used in detecting many organic inorganic gases and vapours.

9. Photo ionization and flame ionization technique are most favoured in detection of ____________
a) Organic gases
b) Inorganic gases
c) Vapours
d) All of the mentioned
View Answer

Answer: a
Explanation: Organic gases can be most effectively detected using photo ionization and flame ionization technique.
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10. Mass sensors are a combination of SAW.
a) True
b) False
View Answer

Answer: a
Explanation: Mass sensors are generally a combination of sensors coming under SAW.

Sanfoundry Global Education & Learning Series – Instrumentation Transducers.

To practice all areas of Instrumentation Transducers for Entrance exams, here is complete set of 1000+ Multiple Choice Questions and Answers.

If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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