[nilesh]

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Hello sir, is there any one can provide me here previous year question paper for Staff Selection Commission Junior engineer for download in PDF form?

[prince karak]

The Staff Selection Commission JE Paper-1 Exam will be conducted from 22nd January to 29th January 2018.

The SSC Junior Engineer question paper includes total 200 questions and divided into 3 sections of General Intelligence, General Awareness and subjective questions.


SSC Junior Engineer Exam Paper General Engineering:

Options:
1) Grashoff number
2) Biot number
3) Stanton number
4) Prandtl number

Correct Answer: Biot number

QID : 802 - An ideal air compressor cycle (with clearance) on p-v diagram can be represented by ________ processes.

Options:
1) one adiabatic, two isobaric, and one constant volume
2) two adiabatic and two isobaric
3) two adiabatic, one isobaric, and one constant volume
4) one adiabatic, one isobaric, and two constant volume

Correct Answer: two adiabatic and two isobaric

QID : 803 - In a shell and tube heat exchanger, baffles are provided on the shell side to ______.

Options:
1) Prevent the stagnation of shell side fluid
2) Improve heat transfer
3) Provide support for tubes
4) All options are correct

Correct Answer: All options are correct

QID : 804 - The ratio of the thickness of thermal boundary layer to the thickness of hydrodynamic boundary layer is equal to (Prandtl number)n, where n is______.

Options:
1) - 1/3
2) - 2/3
3) 1
4) – 1

Correct Answer: - 1/3

QID : 805 - In regarding nucleate boiling _______.

Options:
1) The temperature of the surface is greater than the saturation temperature of the liquid
2) Bubbles are created by expansion of entrapped gas or vapour at small cavities in the surface
3) The temperature is greater than that of film boiling
4) All options are correct

Correct Answer: The temperature is greater than that of film boiling

QID : 806 - Boundary layer is defined as ______.

Options:
1) A thin layer at the surface where gradients of both velocity and temperature are small
2) A thin layer at the surface where velocity and velocity gradients are large
3) A thick layer at the surface where velocity and temperature gradients are large
4) A thin layer at the surface where gradients of both velocity and temperature are large

Correct Answer: A thin layer at the surface where gradients of both velocity and temperature are large

QID : 807 - Two insulating materials of thermal conductivity K and 2K are available for lagging a pipe carrying a hot fluid. If the radial thickness of each material is the same _____.

Options:
1) Material with higher thermal conductivity should be used for the inner layer and one with layer and one with lower thermal conductivity for the outer
2) Material with lower thermal conductivity should be used for the inner layer and one with higher thermal conductivity for the outer
3) It is immaterial in which sequence the insulating materials are used
4) None of these

Correct Answer: Material with lower thermal conductivity should be used for the inner layer and one with higher thermal conductivity for the outer

QID : 808 - Critical thickness of insulation for spheres is given by _____.

Options:
1) k/h
2) k/4h
3) h/2k
4) 2k/h

Correct Answer: 2k/h

QID : 809 - Which surface will have the least emissivity ?

Options:
1) Smooth glass
2) Plaster
3) Aluminium foil
4) Concrete

Correct Answer: Aluminium foil

QID : 810 - The process of heat transfer from one particle of the body to another without the actual motion of the particle, is known as ______ .

Options:
1) Conduction
2) Convection
3) Radiation
4) All options are correct

Correct Answer: Conduction

QID : 811 - The process of heat transfer from a hot body to a cold body in a straight line, without affecting the intervening medium, is known as ______.

Options:
1) Conduction
2) Convection
3) Radiation
4) All options are correct

Correct Answer: Radiation

QID : 812 - Heat is transferred from an electric bulb by ______.

Options:
1) Conduction
2) Convection
3) Radiation
4) All options are correct

Correct Answer: Radiation

QID : 813 - Assumption made in the Fourier's law is that the heat flow
A. Is in steady state
B. Through a solid medium in one dimension

Options:
1) Only (A)
2) Only (B)
3) Both (A) and (B)
4) None of these

Correct Answer: Both (A) and (B)

QID : 814 - If thermal conductivity of a material of wall varies as K_0 (1 + αt), then the temperature at the centre of the wall as compared to that in case of constant thermal conductivity, will be ______.

Options:
1) More
2) Less
3) Same
4) Depend on other factors

Correct Answer: More

QID : 815 - With increase in temperature, thermal conductivity of air ______.

Options:
1) Increases
2) Decreases
3) Remains the same
4) None of these

Correct Answer: Increases

QID : 816 - Liquid metal having highest thermal conductivity is of _______.

Options:
1) Sodium
2) Potassium
3) Lead
4) Mercury

Correct Answer: Sodium

Candidate Answer: Mercury

QID : 817 - Minimum thermal diffusivity is of ______.

Options:
1) Aluminium
2) Rubber
3) Iron
4) Lead

Correct Answer: Rubber

QID : 818 - Critical radius of a hollow cylinder is defined as _______.

Options:
1) Outer radius which gives maximum heat flow
2) Outer radius which gives minimum heat flow
3) Inner radius which gives minimum heat flow
4) Inner radius which gives maximum heat flow

Correct Answer: Outer radius which gives maximum heat flow

QID : 819 - Heat exchangers are used in

A. Condensers and boilers in steam plants
B. Radiators
C. Intercoolers and preheaters
D. Condensers and evaporators in refrigerators and air conditioners

Options:
1) Only A
2) Only B
3) Only C
4) A, B, C and D

Correct Answer: A, B, C and D

QID : 820 - Automobile radiator is a heat exchanger of _____ type.

Options:
1) Counter flow
2) Parallel flow
3) Cross flow
4) Regenerator

Correct Answer: Cross flow

QID : 821 - For a closed system, difference between the heat added to the system and work done by the gas, is equal to the change in_____.

Options:
1) Enthalpy
2) Entropy
3) Internal energy
4) Temperature

Correct Answer: Internal energy

QID : 822 - The sequence of process that eventually returns the working substance to its original state, is known as ______.

Options:
1) Event
2) Thermodynamic cycle
3) Thermodynamic property
4) None of these

Correct Answer: Thermodynamic cycle

QID : 823 - According to Kelvin-Plank's statement, a perpetual motion machine of _______.

Options:
1) First kind is possible
2) First kind is impossible
3) Second kind is impossible
4) Second kind is possible

Correct Answer: Second kind is impossible

QID : 824 - According to kinetic theory of gases, at absolute zero ______.

Options:
1) Specific heat of molecules reduces to zero
2) Kinetic energy of molecules reduces to zero
3) Volume of gas reduce to zero
4) Pressure of gas reduce to zero

Correct Answer: Kinetic energy of molecules reduces to zero

QID : 825 - According to Gay-Lussac's law for perfect gases, the absolute pressure of given mass varies directly as _______.

Options:
1) Temperature
2) Absolute temperature
3) Absolute temperature, if volume remains constant
4) Product of absolute temperature and volume

Correct Answer: Absolute temperature, if volume remains constant

QID : 826 - Three states of matter are distinguished with respect to molecules by the ______.

Options:
1) Atoms in molecules
2) Number
3) Orientation
4) Character of motion

Correct Answer: Character of motion

QID : 827 - Equal volume of all gases, at the same temperature and pressure, contain equal number of molecules. This is according to _______.

Options:
1) Charle's law
2) Avagardo's law
3) Joule's law
4) Gay Lussac law

Correct Answer: Avagardo's law

QID : 828 - Specific heat of a gas, Cp = Cv, at

Options:
1) Absolute zero
2) Critical temperature
3) Triple point
4) All temperatures

Correct Answer: Absolute zero

QID : 829 - The specific heat at constant volume of solids obeys Debye's T3 law at ______.

Options:
1) High temperatures
2) Low temperatures
3) High pressures
4) All temperatures

Correct Answer: All temperatures

QID : 830 - A reversible process _____.

Options:
1) Must pass through a continuous series of equilibrium states
2) Leaves no history of the events in surroundings
3) Must pass through the same states on the reversed path as on the forward path
4) All options are correct

Correct Answer: All options are correct

QID : 831 - In Red Wood Viscometer ______.

Options:
1) Absolute value of viscosity is determined
2) Part of the head of fluid is utilised in overcoming friction
3) Fluid discharges through orifice with negligible velocity
4) Comparison of viscosity is done

Correct Answer: Absolute value of viscosity is determined

[prince karak]

In the given attachment we have given the details about ssc junior engineer question paper.
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