(Papers) SSC Junior Engineer Exam Paper - 2016 "held on 03 March 2017 "Afternoon Shift( General Engineering)
QID : 1001 - Provision of fins on a given heat transfer surface will be more if there are _____.
Options:
1) Fewer number of thin fins
2) Fewer number of thick fins
3) Large number of thick fins
4) Large number of thin fins
Correct Answer: Large number of thick fins
QID : 1002 - Which of the following would lead to a reduction in thermal resistance?
Options:
1) In conduction, reduction in the thickness of the material and an increase in the thermal conductivity.
2) In convection, stirring of the fluid and cleaning the heating surface
3) In radiation, increasing the temperature and reducing the emissivity
4) All options are correct
Correct Answer: All options are correct
QID : 1003 - Inspite of large heat transfer coefficients in boiling liquids, fins are used advantageously when the entire surface is exposed to _____.
Options:
1) Nucleate boiling
2) Film boiling
3) Transition boiling
4) All modes of boiling
Correct Answer: Film boiling
QID : 1004 - The parameter(s) responsible for loss of heat from a hot pipe surface in a room without fans would include _____.
Options:
1) Temperature of the surface and air in the room
2) Emissivity of the surface
3) Length and diameter of the pipe
4) All options are correct
Correct Answer: All options are correct
QID : 1005 -
Options:
1) increases with increase in temperature
2) decreases with increase in temperature
3) is very large
4) is constant at all temperatures
Correct Answer: is very large
QID : 1006 - On a summer day, a scooter rider feels more comfortable while on the move than while at a stop light because _____.
Options:
1) An object in motion captures less solar radiation
2) Air is transparent to radiation and hence it is cooler than the body
3) More heat is lost by convection and radiation while in motion
4) Air has a low specific heat and hence it is cooler
Correct Answer: More heat is lost by convection and radiation while in motion
QID : 1007 - In radiative heat transfer, a gray surface is one _____.
Options:
1) Which appears gray to the eye
2) Whose emissivity is independent of wavelength
3) Which has reflectivity equal to zero
4) Which appears equally bright from all directions
Correct Answer: Whose emissivity is independent of wavelength
QID : 1008 - The property of a working substance, which increases or decreases according to the heat supplied or removed in a reversible manner, is called _____.
Options:
1) Enthalpy
2) Entropy
3) Reversibility
4) None of these
Correct Answer: Entropy
QID : 1009 - Triple point _____.
Options:
1) Occurs in a mixture of two or more gases
2) Is the point, where three phases exists together
3) Occurs in sublimation
4) None of these
Correct Answer: Is the point, where three phases exists together
QID : 1010 - Non quasistatic process is _____.
Options:
1) Free expansion of gas
2) Expansion of a gas in a cylinder under constant pressure
3) Rapid compression of a gas in a cylinder
4) Gradual compression of a gas in a cylinder
Correct Answer: Free expansion of gas
QID : 1011 - Isentropic flow is _____.
Options:
1) Reversible adiabatic flow
2) Irreversible adiabatic flow
3) Frictionless fluid flow
4) None of these
Correct Answer: Reversible adiabatic flow
QID : 1012 - In all reversible process, entropy of the system _____.
Options:
1) Increases
2) Decreases
3) Remains same
4) None of these
Correct Answer: Increases
QID : 1013 - In isothermal expansion, work done by gas depends upon _____.
Options:
1) Atomicity of gas only
2) Expansion ratio only
3) Adiabatic index
4) Both Atomicity of gas and expansion ratio
Correct Answer: Both Atomicity of gas and expansion ratio
QID : 1014 - The difference between two specific heats, Cp and Cv for a gas represents _____.
Options:
1) Increase in kinetic energy of gas molecules
2) Increase in potential energy of gas molecules
3) External work done
4) Increase in volume
Correct Answer: External work done
QID : 1015 - The universal gas constant of a gas is the product of molecular weight of the gas and _____.
Options:
1) Gas constant
2) Specific heat at constant pressure
3) Specific heat at constant volume
4) None of these
Correct Answer: Gas constant
QID : 1016 - The temperature of a gas is a measure of _____.
Options:
1) Average distance between gas molecules
2) Average kinetic energy of gas molecules
3) Average potential energy of gas molecules
4) None of these
Correct Answer: Average kinetic energy of gas molecules
QID : 1017 - A perpetual motion machine of the first kind i.e. a machine which produces power without consuming any energy is _____.
Options:
1) Possible according to first law of thermodynamics
2) Impossible according to first law of thermodynamics
3) Impossible according to second law of thermodynamics
4) Possible according to second law of thermodynamics
Correct Answer: Impossible according to first law of thermodynamics
QID : 1018 - A system consisting of more than one phase is called _____.
Options:
1) Isolated system
2) Open system
3) Non-uniform system
4) Heterogeneous system
Correct Answer: Heterogeneous system
