A bolted joint is shown below. The maximum shear stress, in MPa, in the bolts at A and B, respectively are

1.  242.6, 42.5

2.  42.5, 242.6

3.  42.5, 42.5

4.  all

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4
Correct Answer :

all


Explanation :
No Explanation available for this question

Which combination of the following statements is correct The incorporation of reheater in a steam power plant: P: always increases the thermal efficiency of the plant. Q : always increases the dryness fraction of steam at condenser inlet. R : always increases the mean temperature of heal addition. S: always increases the specific work output.

1.  P and S

2.  Q and S

3.  P,R and S

4.  P, Q, R and S

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4
Correct Answer :

Q and S


Explanation :
No Explanation available for this question

A block brake shown below has a face width of 300 mm and a mean co-efficient of friction of 0.25. For an activating force of 400 N, the braking torque in Nm is

1.  30

2.  40

3.  45

4.  60

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4
Correct Answer :

45


Explanation :
No Explanation available for this question

Which combination of the following statements is correct P: A gas cools upon expansion only when ils Joule-Thomson co-efficient is positive in the temperature range of expansion. Q: For a system undergoing a process, its entropy remains constant only when the process is reversible. R: The work done by a closed system in an adiabatic process is a point function. S: A liquid expands upon freezing when the slope of its fusion curves on Pressure. Temperature diagram is negative.

1.  R and S

2.  P and Q

3.  Q, R and S

4.  P,Q and R

View Answer  
4
Correct Answer :

R and S


Explanation :
No Explanation available for this question

The input link O2P of a four bar linkage is rotated at 2 rad/s counter clockwise direction as shown below. The angular velocity of the coupler PQ in rad/s, at an instant when ∠O4O2P = 1800, is

1.  4

2.  2√2

3.  1

4.  1/√2

View Answer  
4
Correct Answer :

1


Explanation :
No Explanation available for this question

The speed of an engine varies from 210 rad/s to 190 rad/s. During a cycle the change in kinetic energy is found to be 400 Nm. The inertia of the flywheel in kgm2 is

1.  0.10

2.  0.20

3.  0.30

4.  0.40

View Answer  
4
Correct Answer :

0.10


Explanation :
No Explanation available for this question

Which combination of the following statements about steady incompressible forced vortex flow is correct P: Shear stress is zero at all points in the flow. Q: Vorticity is zero at all points in the flow. R: Velocity is directly proportional to the radius from the centre of the vortex. S: Total mechanical energy per unit mass is constant in the entire flow field.

1.  P and Q

2.  R and S

3.  P and R  

4.  P and S

View Answer  
4
Correct Answer :

R and S


Explanation :
No Explanation available for this question

Match the items in columns I and II. Column I                              Column II P: Centrifugal compressor    1: Axial flow Q: Centrifugal pump            2 : Surging R:  Pelton wheel                    3: Priming S: Kaplan turbine                   4: Pure impulse

1.  P-2, Q-3,R-4,S-1

2.  P -2,Q-3,R-l,S-4

3.  P-3,Q-4,R-l,S-2

4.  P-1,Q-2,R-3,S-4

View Answer  
4
Correct Answer :

P-2, Q-3,R-4,S-1


Explanation :
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The natural frequency of the system shown below is

1.  

2.  

3.  

4.  

View Answer  
4
Correct Answer :


Explanation :
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he equation of motion of a harmonic oscillator is given by and the initial conditions at t=0 are x(0). The amplitude of x(t) after n complete cycles is

1.  

2.  

3.  

4.  X

View Answer  
4
Correct Answer :


Explanation :
No Explanation available for this question
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