Thermocouple – Definition
A junction of two dissimilar metal is called thermocouple. Thermocouple is a electrical sensor device used to measure temperature. Junction is a point from which temperature is measures. After the difference of junction temperature e.m.f will be produced. The Galvanometer is a measuring device used to measure e.m.f in thermocouple. It works on the principle of Seebeck Effect. All the MCQs on Thermocouple Questions and Answers are published according to the new study syllabus for academic year 2021-22.
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The aim is to provide Thermocouple MCQs objective questions and answers to understand the concepts of Temperature Measuring Equipment. If you are willing to learn the concepts of Basic Electronics MCQs multiple choice questions with answer then read all the questions and answers. You will be surely able to qualify for all kinds of Quiz / tests / Interviews after understanding the Introduction to Thermocouple. If you are a students, technician or teacher then you can learn the basic concept of Thermocouple applications, principle and function.
Thermocouple MCQs (Questions and Answers)
Q1. A junction / joint of two dissimilar metal is called _______.
- reference point
- solder joint
- thermocouple
- all are correct
Answer: c
Q2. A thermocouple of two different metals has two junctions, first junction is on low temperature and second junction is on high temperature. True / False
Answer: True
Q3. The first junction of thermocouple is called __________.
- hot
- sensing
- cold
- a & b are correct
Answer: d
Q4. The cold junction of thermocouple is also called Reference Junction. True / False
Answer: True
Q5. _______ produced in the thermocouple due to difference of junction temperature.
- E.M.F
- Current
- Resistance
- a & b are correct
Answer: d
Q6. An effective galvanometer is used to measure e.m.f in thermocouple. True / False
Answer: True
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Q7. What characteristics have found in the thermocouple materials.
- control the environmental effect
- control temperature variations
- more sensitive to measure exact value
- all are correct
Answer: d
Q8. Thermocouple works on the principle of Seebeck Effect. True / False
Answer: True
Q9. The temperature range of thermocouple materials are ________.
- 0º C → 190º C
- 0º C → 270º C
- 270º C → 2700º C
- 270º C → 370º C
Answer: c
Q10. The alloy of copper and nickel is called constantan. True / False
Answer: True
Q11. ______ alloys are used for more than 1400ºc.
- Platinum
- Iron
- Platinum Iridium
- a & c are correct
Answer: d
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Q12. The required output from thermocouple can get by connecting in series or parallel groups. True / False
Answer: True
Q13. The series & parallel groups of thermocouples are called ________.
- constantan
- thermodynamics
- thermopiles
- none is correct
Answer: c
Q14. An e.m.f produced in the thermocouple does not depend on the length of metal wires. True / False
Answer: True
Q15. How to protect the metals of thermocouple from the oxidation process ?
- enclosed inside tubes
- connect intermediate metal
- keep on room temperature
- all are correct
Answer: a
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Q16. Pyrometer is a thermocouple used in the industrial furnaces for the measurement of temperature. True / False
Answer: True
Q17. Thermocouples are used in the relays for the ______ of power system.
- protection
- maintenance
- repair
- all are correct
Answer: a
Q18. Sometimes, thermocouples are used to operate the small AC induction motors. True / False
Answer: True
Q19. ________ size thermocouples are used to measure the internal temperature of human body in medical work.
- Small
- Large
- Medium
- Normal
Answer: a
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Q20. In the industries, thermocouples are used upto 1450ºc. True / False
Answer: True