R4RIN – MCQs, Mock Tests | Analytical instruments Analytical Instrumentation MCQ Question Set 21

What is the relation of temperature coefficient of resistivity on the coefficient of thermal expansion in RTD?

1. Higher
2. Lower
3. Equal
4. None of the mentioned

✅ Correct Answer: 1

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?

1. 40 KΩ
2. 4 KΩ
3. 40 Ω
4. 400 Ω

✅ Correct Answer: 1

Which of the following can be used to measure using thermistors?

1. Very low
2. In-between 100Ω and 1MΩ
3. Greater than 1MΩ
4. None of the mentioned

✅ Correct Answer: 2

Thermistors may be in wire form.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

Which of the following is correct for thermistors?

1. Positive temperature coefficient of resistance
2. Negative temperature coefficient of resistance
3. Unpredictable temperature coefficient
4. None of the mentioned

✅ Correct Answer: 2

Thermistors have high stability.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

Which of the following represents drawback of the inductive transducer for displacement measurement?

1. Act of electromagnetic force of attraction
2. Lower sensitivity
3. Requirement of large displacement
4. None of the mentioned

✅ Correct Answer: 1

Which of the following represents the application of inductive transducers?

1. Displacement measurement
2. Thickness measurement
3. Both displacement and thickness measurement
4. None of the mentioned

✅ Correct Answer: 3

Push-pull coil system is used for _____

1. Providing constant permeability
2. Minimize electromagnetic force of attraction
3. Provide immunity from external magnetic effect
4. All of the mentioned

✅ Correct Answer: 4

Closely wound toroid coils are better than solenoid coil.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

Which of the following is correct for toroid type coils?

1. Toroid can be used for measurement of displacement
2. Toroid cannot be used for measuring displacement
3. Toroid can be used for measuring both displacement and velocity
4. None of the mentioned

✅ Correct Answer: 2

Which of the following represents materials used for thickness measurement using inductive transducer?

1. Material should be magnetic in nature
2. Material should be magnetic and conducting
3. Material should be magnetic and non-conducting
4. All of the mentioned

✅ Correct Answer: 4

Which of the following device can be used for measuring relative angular displacement between two systems?

1. Tachometer
2. Synchro
3. Speedo meter
4. None of the mentioned

✅ Correct Answer: 2

Which of the following is correct for synchro?

1. Transformer type displacement transducer
2. Inductive type displacement transducer
3. Capacitive type displacement transducer
4. Resistive type displacement transducer

✅ Correct Answer: 1

For thickness measurement, the material should have constant permeability and resistivity.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

Inductive potentiometers are used to measure ________

1. Voltage
2. Current
3. Displacement
4. None of the mentioned

✅ Correct Answer: 3

Capacitive transducers can be used by _______

1. Measuring change in distance between plates
2. Measuring change in area of plates
3. Change in a dielectric material
4. All of the mentioned

✅ Correct Answer: 4

Capacitive transducers cannot be used as strain gauges.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

Which of the following is correct for the capacitive transducer?

1. Capacitive strain gauges
2. Capacitive tachometers
3. Capacitive pressure transducer
4. All of the mentioned

✅ Correct Answer: 4

For a material capacitance increases with _______

1. Decrease in area of plates, all other factors constant
2. Increase in distance between plates, all other factors constant
3. Decrease in distance between plates, all other factors constant
4. None of the mentioned

✅ Correct Answer: 3

Which of the following is correct for moisture transducers?

1. Dielectric constant of pure water greater than other materials
2. Dielectric constant of pure water much less than other materials
3. Dielectric constant of pure water and of other materials are equal
4. None of the mentioned

✅ Correct Answer: 1

Which of the following device is used for measuring relative humidity?

1. Capacitive pressure transducer
2. Hygrometer
3. Capacitive strain transducer
4. Capacitive moisture transducer

✅ Correct Answer: 2

Which of the following quantities cannot be measured by capacitive transducers?

1. Displacement
2. Speed
3. Moisture
4. None of the mentioned

✅ Correct Answer: 4

Which of the following have high relative permittivity?

1. Bakelite
2. Marble
3. Paraffin
4. All of the mentioned

✅ Correct Answer: 2

Capacitive microphone is an application of ______

1. Capacitive displacement transducer
2. Capacitive moisture transducer
3. Hygrometer
4. None of the mentioned

✅ Correct Answer: 1

Thermometers are not possible using a capacitive transducer.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

Thermocouple is a ________

1. Primary device
2. Secondary transducer
3. Tertiary transducer
4. None of the mentioned

✅ Correct Answer: 1

Operation of thermocouple is governed by ________

1. Peltier effect
2. Seebeck effect
3. Thomson effect
4. All of the mentioned

✅ Correct Answer: 4

______ describes current flow between two junctions formed by two different metals.

1. Peltier effect
2. Thomson effect
3. Seebeck effect
4. None of the mentioned

✅ Correct Answer: 1

Amount of heat liberated or absorbed when 1A current passes is called _______

1. Thomson coefficient
2. Peltier coefficient
3. Seebeck coefficient
4. None of the mentioned

✅ Correct Answer: 2

Total seebeck effect can be found as ________

1. Total peltier effect
2. Total Thomson effect
3. Partly peltier and partly Thomson effect
4. None of the mentioned

✅ Correct Answer: 3

Which of the following element is used as a thermocouple in nuclear reactor?

1. Boron
2. Platinum
3. Copper
4. Iron

✅ Correct Answer: 1

Thermocouple cannot used for measurement of temperature of liquid.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

______ can be used as a replacement for thermocouple lead.

1. Replacement lead
2. Replica lead
3. Compensating lead
4. None of the mentioned

✅ Correct Answer: 3

Thermo couple cannot be used to measure _______

1. Temperature of gas
2. Temperature of liquid
3. IR radiation
4. None of the mentioned

✅ Correct Answer: 4

Peltier effect is reverse of seebeck effect.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 1

Internal temperature of a hot body is measured by measuring ________

1. Temperature of surrounding medium
2. Temperature of external surface
3. Direct measurement
4. Cannot measure internal temperature

✅ Correct Answer: 2

Temperature gradient of a substance is _______

1. Positive constant
2. Negative constant
3. Zero
4. Variable

✅ Correct Answer: 4

Feedback system is used to _____

1. Cancel use of temperature gradient
2. To reduce delay in measurement
3. To improve accuracy
4. None of the mentioned

✅ Correct Answer: 3

If temperature T1 of material A is equal to temperature T2 of material B, then which of the following are correct?

1. Heat flow from A to B
2. Heat flow from B to A
3. No heat flow
4. Temperature at the junction increases

✅ Correct Answer: 3

Which of the following represents closed loop thermal control?

1. Thermistor
2. Thermostat
3. Thermocouple
4. All of the mentioned

✅ Correct Answer: 2

Which of the following true for temperature gradient?

1. Dimensional quantity
2. Dimensionless quantity
3. Unit less quantity
4. SI unit is K/m2

✅ Correct Answer: 1

Which of the following represents unit for temperature gradient?

1. K/m2
2. K
3. K/m
4. K/s

✅ Correct Answer: 3

Which of the following is correct for temperature gradient?

1. Describes direction of temperature change
2. Describes rate of temperature change
3. Describes both direction and rate of temperature change
4. None of the mentioned

✅ Correct Answer: 3

Temperature gradient is a scalar quantity.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

Which of the following represents the rate of heat loss of a body?

1. Initial temperature
2. Final temperature
3. Difference in temperature between body and surrounding
4. None of the mentioned

✅ Correct Answer: 3

Standardization of potentiometer is used for __________

1. Accuracy
2. Accuracy in measurement
3. Use of low voltage sources
4. None of the mentioned

✅ Correct Answer: 3

Which of the following device is used for calibration of a potentiometer?

1. Electrochemical cell
2. Galvanometer
3. Variable dc source
4. All of the mentioned

✅ Correct Answer: 2

Galvanometer used should be calibrated first.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

Which of the following cannot be measured using potentiometer?

1. DC voltage
2. Temperature
3. Resistance
4. None of the mentioned

✅ Correct Answer: 4