SCE Engineering Sciences 2

Question 1

What is the moment of inertia of a rectangular cross-section about its centroidal axis?

Accepted Answer

bh³/12

Answer

bh²/12

Answer

b²h/12

Answer

bh³/6

Question 2

Bernoulli's equation assumes:

Accepted Answer

Steady, incompressible, inviscid flow along a streamline

Answer

Turbulent, compressible flow

Answer

Viscous flow with friction losses

Answer

Unsteady flow conditions

Question 3

The Mohr's circle is used to determine:

Accepted Answer

Principal stresses and maximum shear stress

Answer

Bending moments

Answer

Deflection of beams

Answer

Buckling loads

Question 4

What is the Carnot efficiency of a heat engine operating between 600K and 300K?

Accepted Answer

50%

Answer

100%

Answer

25%

Answer

75%

Question 5

Poisson's ratio relates:

Accepted Answer

Lateral strain to axial strain

Answer

Stress to strain

Answer

Force to area

Answer

Shear stress to shear strain

Question 6

The specific heat capacity at constant pressure (Cp) is always greater than at constant volume (Cv) because:

Accepted Answer

At constant pressure, additional energy is needed for expansion work

Answer

Pressure increases internal energy

Answer

Volume work decreases entropy

Answer

Temperature is higher at constant pressure