SDO Mechanical Engineering Question Paper

Will you please provide here SDO Mechanical Engineering Question Paper???

[Kiran Chandar]

You are looking for SDO Mechanical Engineering Question Paper, here i am giving:

In abrasive jet machining, as the distance between the nozzle tip and the work surface increases, the
material removal rate
(A) increases continuously.
(B) decreases continuously.
(C) decreases, becomes stable and then increases.
(D) increases, becomes stable and then decreases.

During normalizing process of steel, the specimen is heated
(A) between the upper and lower critical temperature and cooled in still air.
(B) above the upper critical temperature and cooled in furnace.
(C) above the upper critical temperature and cooled in still air.
(D) between the upper and lower critical temperature and cooled in furnace.

Which one of the following is NOT a decision taken during the aggregate production planning
stage?
(A) Scheduling of machines (B) Amount of labour to be committed
(C) Rate at which production should happen (D) Inventory to be carried forward

Which one of the following configurations has the highest fin effectiveness?
(A) Thin, closely spaced fins (B) Thin, widely spaced fins
(C) Thick, widely spaced fins (D) Thick, closely spaced fins

Analysis of variance is concerned with

(a) determining change in a dependent variable per unit change in an independent variable
(b determining whether a qualitative factor affects the mean of an output variable
(c) determining whether significant correlation exists between an output variable and an input variable
(d) determining whether variances in two or more populations are significantly different.

Which theory of failure will you use for aluminium components under steady loading

(a) Principal stress theory
(b) Principal strain theory
(c) Strain energy theory
(d) maximum shear stress theory

In a pulverised4uel-fired large power boiler, then heat transfer from the burning fuel to the walls of the furnace is

(a) by conduction only
(1) ByconvectioflOfllY
( by conduction and convection
(d) predominantly by radiation

Which of the following statements does NOT apply to the volumetric efficiencY of a reciprocating air compressor?
(a) it decreases with increase in inlet Lempee
(b) It increases with decrease in pressure ratio
(c) it increases with decrease in clearance ratio
(d) it decreases with increase in c1earafl to stroke rati

A circular solid disc of uniform thickness 20 mm, radius 200 mm and mass 20 kg, is used as a
flywheel. If it rotates at 600 rpm, the kinetic energy of the flywheel, in Joules is
(A) 395 (B) 790
(C) 1580 (D) 3160

Hi could you please provide me with the previous year question paper for the Mechanical Engineering subject of SDO examination?

[Shaleen]

The previous year question paper for the Mechanical Engineering subject of SDO examination is as follows:

In a single stage reciprocating air compressor, the work done on air to compress it from suction pressure to delivery pressure will be minimum when the compression is
A. Isothermal process
B. Adiabatic process
C. Polytropic process
D. Constant pressure process
Ans: A

The function of economizer in a boiler is to
A. Superheat the steam
B. Reduce fuel consumption
C. Increase steam pressure
D. Maintain saturation temperature
Ans: B

Lowest COP is of vapour
A.Compression cycle with superheated vapour
B. Compression cycle with dry compression
C. Compression cycle with wet compression
D. Absorption cycle
Ans: D

In abrasive jet machining, as the distance between the nozzle tip and the work surface increases, the material removal rate
(A) Increases continuously.
(B) Decreases continuously.
(C) Decreases becomes stable and then increases.
(D) Increases, becomes stable and then decreases.

During normalizing process of steel, the specimen is heated
(A) Between the upper and lower critical temperature and cooled in still air.
(B) Above the upper critical temperature and cooled in furnace.
(C) Above the upper critical temperature and cooled in still air.
(D) Between the upper and lower critical temperature and cooled in furnace.

Which one of the following is NOT a decision taken during the aggregate production planning stage?
(A) Scheduling of machines
(B) Amount of labor to be committed
(C) Rate at which production should happen
(D) Inventory to be carried forward

Which theory of failure will you use for aluminum components under steady loading
(a) Principal stress theory
(b) Principal strain theory
(c) Strain energy theory
(d) Maximum shear stress theory

In a pulverised4uel-fired large power boiler, then heat transfer from the burning fuel to the walls of the furnace is
(a) By conduction only
(b) ByconvectioflOfllY
(c) Conduction and convection
(d) Predominantly by radiation

Which of the following statements does NOT apply to the volumetric efficiencY of a reciprocating air compressor?
(a) It decreases with increase in inlet Lempee
(b) It increases with decrease in pressure ratio
(c) It increases with decrease in clearance ratio
(d) It decreases with increase in c1earafl to stroke ratio

A circular solid disc of uniform thickness 20 mm, radius 200 mm and mass 20 kg is used as a flywheel. If it rotates at 600 rpm, the kinetic energy of the flywheel, in Joules is
(A) 395
(B) 790
(C) 1580
(D) 3160

Which one of the following configurations has the highest fin effectiveness?
(A) Thin, closely spaced fins
(B) Thin, widely spaced fins
(C) Thick, widely spaced fins
(D) Thick, closely spaced fins

Analysis of variance is concerned with
(a) Determining change in a dependent variable per unit change in an independent variable
(b) Determining whether a qualitative factor affects the mean of an output variable
(c) Determining whether significant correlation exists between an output variable and an input variable
(d) Determining whether variances in two or more populations are significantly different.

The buoyancy force is
A. Equal to volume of liquid displaced
B. Force necessary to maintain equilibrium of a submerged body
C. The resultant force acting on a floating body
D. The resultant force on a body due to the fluid surrounding it
Ans: D

Navier – stokes equations are useful in the analysis of
A. Turbulent flows
B. Vortex flows
C. Viscous flows
D. Rotatioal flows
Ans:C

Newton’s law of viscosity relates
A. Velocity gradient and rate of shear strain
B. Rate of shear deformation and shear stress
C. Shear deformation and shear stress
D. Pressure and volumetric strain
Ans: B


Calculation of meta-centric height of a floating body involves second moment of area.The axis about which this moment is to be calculated passes through the
A. Top horizontal surface of the body
B. Bottom horizontal surface of the body
C. Centre of gravity of the body
D. Centre of buoyancy
Ans: B

When air is adiabatically saturated, the temperature attained is the
A. Dew point temperature
B. Dry bulb temperature
C. Wet bulb temperature
D. Apparatus Dew-point temperature
Ans: C

Air vessels are used in reciprocating pumps in order to
A. Increase the delivery head
B. Reduce suction head
C. Minimize delivery head fluctuation
D. Reduce accelerating head
Ans: D

A Kaplan turbine is a
A. Outward flow reaction turbine
B. Inward flow impulse turbine
C. Low head axial flow turbine
D. High head mixed flow turbine
Ans: C

Clapeyron’s equation is used for finding out the
A. Dryness fraction of steam only
B. Entropy of superheater vapour only
C. Specific volume at any temperature and pressure
D. Total heat of superheated steam only
Ans: C

Which one of the following represents open thermodynamic system?
A. Manual ice cream freezer
B. Centrifugal pump
C. Pressure cooker
D. Bomb calorimeter
Ans:B

The centre of pressure for an inclined surface area
A. Lies below the centroid of the surface strain
B. Coincides with the centroid
C. Lies above the centroid of the surface
D. None of the above
Ans: (a)

Air injection is IC engine refers to injection of
A. Air only
B. Liquid fuel only
C. liquid fuel and air
D. Supercharging air
Ans: B

Isentropic flow is
A. Irreversible adiabatic flow
B. Reversible adiabatic flow
C. Ideal fluid flow
D. Frictionless reversible flow
Ans: B

Which of the following is not an essential component of any refrigeration system, where refrigeration effect is produced by vaporization of refrigerant ?
A. Compressor
B. condenser
C.Evaporator
D. Expansion device
Ans: A