Instrumentation Transducers

Heat Flow Balance Systems

Question 1
Marks : +2 | -2
Pass Ratio : 100%
Which of the following describes molecule movement in gas and liquid?
Conduction
Convection
Radiation
Diffusion
Explanation:
Convection is the process of describing molecule movement in gas and liquid.
Question 2
Marks : +2 | -2
Pass Ratio : 100%
Which of the following factors affect thermal conductivity?
Temperature
Chemical phase
Thermal anisotropy
All of the mentioned
Explanation:
Thermal conductivity is affected by temperature, chemical phase change and anisotropy.
Question 3
Marks : +2 | -2
Pass Ratio : 100%
When anisotropy is present, direction of heat flow and thermal gradient will be same.
True
False
Explanation:
On anisotropic materials direction of heat flow and thermal gradient may vary.
Question 4
Marks : +2 | -2
Pass Ratio : 100%
Insulation property of an insulator decrease in _____________
Dry condition
Moisture
Powdered form
Compressed state
Explanation:
In moisture condition, insulation property of insulator decreases.
Question 5
Marks : +2 | -2
Pass Ratio : 100%
What is ‘Righi Leduc-effect’?
Effect of magnetic field on thermal conductivity
Effect of chemical phase on thermal conductivity
Effect of temperature on thermal conductivity
None of the mentioned
Explanation:
Effect of magnetic field on thermal conductivity is known as Righi-Leduc effect. It is also known as Thermal hall-effect.
Question 6
Marks : +2 | -2
Pass Ratio : 100%
Under phase change, thermal conductivity remains constant.
True
False
Explanation:
Phase change is an important factor which affects thermal conductivity.
Question 7
Marks : +2 | -2
Pass Ratio : 100%
Which of the following represents opposition to heat flow?
Thermal resistance
Thermal opposition
Thermal reactance
Thermal barrier
Explanation:
Thermal resistance is a measure of opposition to heat flow.
Question 8
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Pass Ratio : 100%
SI unit of thermal conductivity is _____________
W/m K
W
K
W2/m K
Explanation:
SI unit of thermal conductivity is watt per meter kelvin.
Question 9
Marks : +2 | -2
Pass Ratio : 100%
Hot wire anemometer is an application of ___________________
Resistive transducer
Inductive transducer
Capacitive transducer
Thermo electric transducer
Explanation:
Hot wire anemometer works on the relation between temperature and resistance of a material.
Question 10
Marks : +2 | -2
Pass Ratio : 100%
Hot wire anemometer can be used to measure _________________
Flow rate of non-conducting liquid
Flow rate of conducting liquid
Liquid level measurement
pH of liquid
Explanation:
Hot wire anemometer is used for measuring the flow rate of a non-conducting liquid.