# The transverse shear stress acting in a beam of rectangular cross-section, subjected to a transverse shear load, is

1.  variable with maximum at the bottom of the beam

2.  variable with maximum at the top of the beam

3.  uniform

4.  variable with maximum of the neutral axis

4

variable with maximum of the neutral axis

Explanation :
No Explanation available for this question

# A rod of length L and diameter D is subjected to a tensile load P. Which of the following is sufficient to calculate the resulting change in diameter

1.  Young’s modulus

2.  Shear modulus

3.  Poisson’s ratio

4.  Both Young’s modulus or Shear modulus

4

Both Young’s modulus or Shear modulus

Explanation :
No Explanation available for this question

# A straight rod of length L(t), hinged at one end and freely extensible at the other end, rotates through an angle θ(t) about the hinge. At time t, θ(t)=1 rad/s. The magnitude of the velocity at the other end of the rod is:

1.  1 m/s

2.  √2 m/s

3.  √3 m/s

4.  2 m/s

4

√2 m/s

Explanation :
No Explanation available for this question

# A cantilever type gate hinged at Q is shown in the figure. P and R are the centers of gravity of the cantilever part and the counterweight respectively. The mass of the cantilever part is 75 kg. The mass of the counterweight, for static balance, is

1.  75 kg

2.  150 kg

3.  225 kg

4.  300 kg

4

300 kg

Explanation :
No Explanation available for this question

# A planar mechanism has 8 links and 10 rotary joints. The number of degrees of freedom of the mechanism, using Gruebler's criterion, is

1.  0

2.  1

3.  2

4.  3

4

1

Explanation :
No Explanation available for this question

# An axial residual compressive stress due to a manufacturing process is present on the outer surface of a rotating shaft subjected to bending. Under a given bending load, the fatigue life of the shaft in the presence of the residual compressive stress is

1.  decreased

2.  increased or decreased, depending on the external bending load

3.  neither decreased nor increased

4.  increased

4

increased

Explanation :
No Explanation available for this question

# 2 moles of oxygen are mixed adiabatically with another 2 moles of oxygen in mixing chamber, so that the final total pressure and temperature of the mixture become same as those of the individual constituents at their initial states. The universal gas constant is given as R. The change in entropy due to mixing, per mole of oxygen, is given by

1.  –R   ln2

2.  0

3.  R ln2

4.  R ln4

4

0

Explanation :
No Explanation available for this question

# For the continuity equation given by  to be valid, where  is the velocity vector, which one of the following is a necessary condition

2.  irrotational flow

3.  in viscid flow

4.  incompressible flow

4

incompressible flow

Explanation :
No Explanation available for this question

# Which one of the following is NOT a necessary assumption for the air-standard Otto cycle

1.  All processes are both internally as well as externally reversible

2.  Intake and exhaust processes are constant volume heat rejection processes

3.  The combustion process is a constant volume heat addition process

4.  The working fluid is an ideal gas with constant specific heats

4

Intake and exhaust processes are constant volume heat rejection processes

Explanation :
No Explanation available for this question

1.

2.

3.  λe-λt

4.  e-λt/λ

4