Analytical instruments MCQ Quiz Hub

1. What is the relation of temperature coefficient of resistivity on the coefficient of thermal expansion in RTD?
Higher
Lower
Equal
None of the mentioned

2. A metal with temperature coefficient of resistance has a value 200, its initial resistance is given by 40Ω. For an increase in 300c to350c what will be the final resistance value?
40 KΩ
4 KΩ
40 Ω
400 Ω

3. Which of the following can be used to measure using thermistors?
Very low
In-between 100Ω and 1MΩ
Greater than 1MΩ
None of the mentioned

4. Thermistors may be in wire form.
True
False
all of the above
None of the mentioned

5. Which of the following is correct for thermistors?
Positive temperature coefficient of resistance
Negative temperature coefficient of resistance
Unpredictable temperature coefficient
None of the mentioned

6. Thermistors have high stability.
True
False
all of the above
None of the mentioned

7. Which of the following represents drawback of the inductive transducer for displacement measurement?
Act of electromagnetic force of attraction
Lower sensitivity
Requirement of large displacement
None of the mentioned

8. Which of the following represents the application of inductive transducers?
Displacement measurement
Thickness measurement
Both displacement and thickness measurement
None of the mentioned

9. Push-pull coil system is used for _____
Providing constant permeability
Minimize electromagnetic force of attraction
Provide immunity from external magnetic effect
All of the mentioned

10. Closely wound toroid coils are better than solenoid coil.
True
False
all of the above
None of the mentioned

11. Which of the following is correct for toroid type coils?
Toroid can be used for measurement of displacement
Toroid cannot be used for measuring displacement
Toroid can be used for measuring both displacement and velocity
None of the mentioned

12. Which of the following represents materials used for thickness measurement using inductive transducer?
Material should be magnetic in nature
Material should be magnetic and conducting
Material should be magnetic and non-conducting
All of the mentioned

13. Which of the following device can be used for measuring relative angular displacement between two systems?
Tachometer
Synchro
Speedo meter
None of the mentioned

14. Which of the following is correct for synchro?
Transformer type displacement transducer
Inductive type displacement transducer
Capacitive type displacement transducer
Resistive type displacement transducer

15. For thickness measurement, the material should have constant permeability and resistivity.
True
False
all of the above
None of the mentioned

16. Inductive potentiometers are used to measure ________
Voltage
Current
Displacement
None of the mentioned

17. Capacitive transducers can be used by _______
Measuring change in distance between plates
Measuring change in area of plates
Change in a dielectric material
All of the mentioned

18. Capacitive transducers cannot be used as strain gauges.
True
False
all of the above
None of the mentioned

19. Which of the following is correct for the capacitive transducer?
Capacitive strain gauges
Capacitive tachometers
Capacitive pressure transducer
All of the mentioned

20. For a material capacitance increases with _______
Decrease in area of plates, all other factors constant
Increase in distance between plates, all other factors constant
Decrease in distance between plates, all other factors constant
None of the mentioned

21. Which of the following is correct for moisture transducers?
Dielectric constant of pure water greater than other materials
Dielectric constant of pure water much less than other materials
Dielectric constant of pure water and of other materials are equal
None of the mentioned

22. Which of the following device is used for measuring relative humidity?
Capacitive pressure transducer
Hygrometer
Capacitive strain transducer
Capacitive moisture transducer

23. Which of the following quantities cannot be measured by capacitive transducers?
Displacement
Speed
Moisture
None of the mentioned

24. Which of the following have high relative permittivity?
Bakelite
Marble
Paraffin
All of the mentioned

25. Capacitive microphone is an application of ______
Capacitive displacement transducer
Capacitive moisture transducer
Hygrometer
None of the mentioned

26. Thermometers are not possible using a capacitive transducer.
True
False
all of the above
None of the mentioned

27. Thermocouple is a ________
Primary device
Secondary transducer
Tertiary transducer
None of the mentioned

28. Operation of thermocouple is governed by ________
Peltier effect
Seebeck effect
Thomson effect
All of the mentioned

29. ______ describes current flow between two junctions formed by two different metals.
Peltier effect
Thomson effect
Seebeck effect
None of the mentioned

30. Amount of heat liberated or absorbed when 1A current passes is called _______
Thomson coefficient
Peltier coefficient
Seebeck coefficient
None of the mentioned

31. Total seebeck effect can be found as ________
Total peltier effect
Total Thomson effect
Partly peltier and partly Thomson effect
None of the mentioned

32. Which of the following element is used as a thermocouple in nuclear reactor?
Boron
Platinum
Copper
Iron

33. Thermocouple cannot used for measurement of temperature of liquid.
True
False
all of the above
None of the mentioned

34. ______ can be used as a replacement for thermocouple lead.
Replacement lead
Replica lead
Compensating lead
None of the mentioned

35. Thermo couple cannot be used to measure _______
Temperature of gas
Temperature of liquid
IR radiation
None of the mentioned

36. Peltier effect is reverse of seebeck effect.
True
False
all of the above
None of the mentioned

37. Internal temperature of a hot body is measured by measuring ________
Temperature of surrounding medium
Temperature of external surface
Direct measurement
Cannot measure internal temperature

38. Temperature gradient of a substance is _______
Positive constant
Negative constant
Zero
Variable

39. Feedback system is used to _____
Cancel use of temperature gradient
To reduce delay in measurement
To improve accuracy
None of the mentioned

40. If temperature T1 of material A is equal to temperature T2 of material B, then which of the following are correct?
Heat flow from A to B
Heat flow from B to A
No heat flow
Temperature at the junction increases

41. Which of the following represents closed loop thermal control?
Thermistor
Thermostat
Thermocouple
All of the mentioned

42. Which of the following true for temperature gradient?
Dimensional quantity
Dimensionless quantity
Unit less quantity
SI unit is K/m2

43. Which of the following represents unit for temperature gradient?
K/m2
K
K/m
K/s

44. Which of the following is correct for temperature gradient?
Describes direction of temperature change
Describes rate of temperature change
Describes both direction and rate of temperature change
None of the mentioned

45. Temperature gradient is a scalar quantity.
True
False
all of the above
None of the mentioned

46. Which of the following represents the rate of heat loss of a body?
Initial temperature
Final temperature
Difference in temperature between body and surrounding
None of the mentioned

47. Standardization of potentiometer is used for __________
Accuracy
Accuracy in measurement
Use of low voltage sources
None of the mentioned

48. Which of the following device is used for calibration of a potentiometer?
Electrochemical cell
Galvanometer
Variable dc source
All of the mentioned

49. Galvanometer used should be calibrated first.
True
False
all of the above
None of the mentioned

50. Which of the following cannot be measured using potentiometer?
DC voltage
Temperature
Resistance
None of the mentioned