A solid circular shaft of diameter 100 mm is subjected to an axial stress of 50 MPa. It is further subjected to a torque of 10 kNm. The maximum principal stress experienced on the shaft is closest to

1.  41 MPa

2.  82 MPa

3.  164 MPa

4.  204 MPa

View Answer  
4
Correct Answer :

82 MPa


Explanation :
No Explanation available for this question

A Circular disk of radius R rolls without slipping at a velocity v. The magnitude of the velocity at point (see figure) is

1.  √3 v

2.  √3 v/2

3.  v/2

4.  2v/√3

View Answer  
4
Correct Answer :

√3 v


Explanation :
No Explanation available for this question

Consider a truss PQR loaded at P with a force F as shown in the figure. The tension in the member QR is

1.  0.5 F

2.  0.63F

3.  0.73F

4.  0.87F

View Answer  
4
Correct Answer :

0.63F


Explanation :
No Explanation available for this question

The natural frequency of the spring mass system shown in the figure is closest to

1.  8 Hz

2.  10 Hz

3.  12 Hz

4.  14 Hz

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4
Correct Answer :

8 Hz


Explanation :
No Explanation available for this question

The rod PQ of length L and with flexural rigidity EI is hinged at both ends. For what minimum force F is it expected to buckle

1.  π2EI/L2

2.  √2π2EI/L2

3.  π2EI/√2L2

4.  π2EI/2L2

View Answer  
4
Correct Answer :

π2EI/√2L2


Explanation :
No Explanation available for this question

A compression spring is made of music wire of 2 mm diameter having a shear strength and shear modulus of 800 MPa and 80 GPa respectively. The mean coil diameter is 20 mm, free length is 40 mm and the number of active coils is 10. If the mean coil diameter is reduced to 10 mm, the stiffness of the spring is approximately

1.  decreased by 8 times

2.  decreased by 2 times

3.  increased by 2 times

4.  increased by 8 time

View Answer  
4
Correct Answer :

increased by 8 time


Explanation :
No Explanation available for this question

A clutch has outer and inner diameters 100 mm and 40 mm respectively. Assuming a uniform pressure of 2 MPa and coefficient of friction of liner material 0.4, the torque carrying capacity of the clutch is

1.  148 Nm

2.  196 Nm

3.  372 Nm

4.  490 Nm

View Answer  
4
Correct Answer :

196 Nm


Explanation :
No Explanation available for this question

A spur gear has a module of 3 mm, number of teeth 16, a face width of 36 mm and a pressure angle of 20°. It is transmitting a power of 3 kW at 20 rcv/s. Taking a velocity factor of 1.5, and a form factor of 0.3, the stress in the gear tooth is about

1.  32 MPa

2.  46 MPa

3.  58 MPa

4.  70 MPa

View Answer  
4
Correct Answer :

58 MPa


Explanation :
No Explanation available for this question

Match the type of gears with their most appropriate description   Type of gear     Description p Helical   1 Axes non parallel and non intersectin Q Spiral Bevel   2 Axes parallel and teeth are inclined to the axis R Hypoid   3 Axes parallel and teeth are parallel to the axis S Rack and pinion   4 Axes arc perpendicular and intersecting, and teeth arc inclined to the axis       5 Axes are perpendicular and used for large speed reduction       6 Axes parallel and one of the gears has infinite radius  

1.  P-2, Q-4, R-1, S-6

2.  P-1, Q-4, R-5, S-6

3.  P-2, Q-6, R-4, S-2

4.  P-6, Q-3, R-1, S-5

View Answer  
4
Correct Answer :

P-2, Q-4, R-1, S-6


Explanation :
No Explanation available for this question

A two dimensional fluid element rotates like a rigid body. At a point within the element, the pressure is 1 unit. Radius of the Mohr's circle, characterizing the state of stress at that point, is

1.  0.5 unit

2.  0 unit

3.  1 unit

4.  2 unit

View Answer  
4
Correct Answer :

0 unit


Explanation :
No Explanation available for this question
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