Instrumentation Transducers

Temperature Balance System

Question 1
Marks : +2 | -2
Pass Ratio : 100%
Temperature gradient of a substance is _________________
Positive constant
Negative constant
Zero
Variable
Explanation:
Temperature gradient is a variable, which may show variation in temperature measured.
Question 2
Marks : +2 | -2
Pass Ratio : 100%
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
Explanation:
Difference in temperature between body and surrounding is a direct measure of heat loss by body.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
Which of the following represents closed loop thermal control?
Thermistor
Thermostat
Thermocouple
All of the mentioned
Explanation:
Thermostat is a device which is an example of closed loop thermal control.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
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
Explanation:
Temperature gradient is a factor which describes both rate and direction of temperature change.
Question 5
Marks : +2 | -2
Pass Ratio : 100%
Which of the following true for temperature gradient?
Dimensional quantity
Dimensionless quantity
Unit less quantity
SI unit is K/m2
Explanation:
Temperature gradient is a vector quantity with both magnitude and dimension.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
Feedback system is used to ____________
Cancel use of temperature gradient
To reduce delay in measurement
To improve accuracy
None of the mentioned
Explanation:
Feedback system in temperature balance system is used to improve accuracy in measurement.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
Internal temperature of a hot body is measured by measuring __________________
Temperature of surrounding medium
Temperature of external surface
Direct measurement
Cannot measure internal temperature
Explanation:
External surface temperature is measured and by estimating temperature gradient, the internal temperature can be found.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
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
Explanation:
If temperature of two materials are equal, no heat flow occurs between materials.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
Temperature gradient is a scalar quantity.
True
False
Explanation:
Temperature gradient is a quantity with both direction and magnitude, and hence surely it is a vector quantity.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
Which of the following represents unit for temperature gradient?
K/m2
K
K/m
K/s
Explanation:
Temperature gradient is a measure of temperature in kelvin measure per meter length.