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Q.1
What is done to increase the rate of heat transfer in the Velox boiler?
The boiler is heated up to very high range of temperature
Combustion gases are circulated through tubes with supersonic speed
High grade fuel is made use for the combustion
The size of the boiler is changed as it is flexible
Q.2
Which of the following relations depict relation between Celsius and Fahrenheit scale?
A.(oC / 5) = (oF – 32) / 9
b. (oC / 9) = (oF – 32) / 5
c. (oC / 32) = (oF – 9) / 5
d. None of the above
Q.3
The heat balance sheet for the boiler shows the
complete account of heat supplied by 1 kg of dry fuel and the heat consumed
moisture present in the fuel
steam formed by combustion of hydrogen per kg of fuel
complete combustion of one kg of fuel
Q.4
The compression, condensation and expansion of refrigerant in a vapour compression refrigeration system is
Isenthalpic, isentropic and isothermal
Isentropic, Isochoric and isothermal
Isothermal, Isentropic and Isochoric
Isentropic, Isobaric and Isenthalpic
Q.5
Which of the following depends on physical properties of fluids as well as geometry of the heat exchanger?
Fouling coefficient
Overall heat transfer coefficient
LMTD (Log Mean Temperature Difference)
Effectiveness
Q.6
Heat balance in a boiler furnace is improved by sending air to the furnace
At low temperature
At high temperature
Does not depends on temperature
depends on pressure
Q.7
The performance of a boiler is NOT measured by the
amount of water evaporated per hour
steam produced in kg/h
steam produced in kg/kg of fuel burnt
complete combustion of one kg of fuel per hour
Q.8
Dribbling a basketball is an example of
potential energy
stored energy
temperature
kinetic energy
Q.9
At which pressure the properties of water and steam become identical
1 bar
273 bar
221 bar
100 bar
Q.10
The device used for recovering waste heat from the textile drier exhaust
heat wheel
recuperator
economizer
regenerator
Q.11
Which will have the HIGHEST thermal energy?
Hot cup of tea
Cold bathtub water
Huge lake
Warm bowl of soup
Q.12
Objects with MORE MASS have MORE thermal energy because
there are more molecules with energy in bonds
there are less atoms
there is less kinetic energy in the system
there is no potential energy at all
Q.13
Which will have the LOWEST thermal energy?
Large mug of hot coffee
Baby bottle with warm milk
Gatorade jug of cold Gatorade
Large frozen puddle
Q.14
Everything has thermal energy
False
True
Q.15
All matter is made up of atoms that are constantly moving
True
False
Q.16
Which of the following is the correct definition of ‘Shaft Power’?
It is the power developed by the blades
It is the power developed at the rim
It is the power based on the total internal steam flow and adiabatic heat drop
It is the actual power transmitted by the turbine
Q.17
Which of the following is the correct definition for ‘Adiabatic Power’?
It is the power developed at the rim
It is the actual power transmitted by the turbine
It is the power based on the total internal steam flow and adiabatic heat drop
It is the power developed by the blades
Q.18
In the context of cogeneration turbine, the thermodynamic process taking place is
expansion
condensation
contraction
both (a) & (c)
Q.19
For objects that have the SAME mass, which object will have a HIGHER thermal energy?
the object with the higher temperature
the object with the lower temperature
the objects will have the same temperature
the objects have no temperature
Q.20
Temperature always measures the ___________ movement of molecules
median
mode
total
average
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