Mock Test: SSC JE (ME)- 14 - Mechanical Engineering MCQ

Its pressure

its temperature

both its pressure and temperature

the number of atoms in a molecule

Adiabatic expansion

Isothermal expansion

Polytropic expansion

Free expansion

0.5 kJ/K

1.0 kJ/ K

1.5 kJ/K

2.0 kJ/K

Engine A

Engine B

Engine C

All engines have same efficiency

dependent on temperature only

maximum

minimum

zero

Increase in availability of energy

Increase in temperature

Decreases in pressure

Degradation of energy

increase of coolant water temperature.

increase of temperature of inlet air.

decrease of compression ratio

increase of compression ratio

30 – 40

41 – 50

51 – 60

61 – 70

Temperature ad pressure in the cylinder at the time of injection

Nature of the fuel mixture strength

Relative velocity between the fuel injection and air turbulence pressure of

All of the above.

Reheating

Superheating

Supersaturation

Blade friction

Due to high temperature steam

Due to droplets in steam

Due to high rotational speed

Due to high flow rate

≤ – 1

0

1

≥ 2

a straight line

involute path

curved line

circle

great speed reduction

transmitting motion between two intersecting shafts

equal speed

minimum axial thrust

straight over the wheel rim

inclined to wheel rim

curved over the wheel rim

cut on the surfaces of the frusta of cones

Porter

Pickering

Watt

Wilson hartnell

sleeve bearing

hydrostatic bearings

ball and roller bearings

None of these

ball bearings

roller bearings

thrust bearings

any of the above

0.5 kPa

12.5 kPa

13.73 kN/m²

137.3 kN/m²

centre of gravity of the body

point of intersection of the buoyant force and the gravitational force

point of intersection of the buoyant force and the centre line of the body

centre of the volume of the displaced fluid

legs downwards

legs on sides

legs upwards

any position

can be used anywhere

can be used only outside the boundary layer

can be used only inside the boundary layer

cannot be used either inside or outside the boundary layer

energy balance

conservation of momentum for an inviscid fluid

conservation of momentum for an incompressible flow

conservation of momentum for a real fluid

Velocity of fluids

Discharge of fluids

Viscosity of fluids

Rotational speed of solid shafts

3

4

21

25

2

3

9

21

equivalent length of the column to the minimum radius of gyration

length of the column to the minimum radius of gyration

length of the column to the cross section of the column

minimum radius of gyration to the area of cross section of the column

directly proportional to the radius of gyration

directly proportional to the moment of inertia

inversely proportional to the area

inversely proportional to the radius of gyration