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Examination:
Que.No Question/Problem marks
Q 4a)(iii)

State the effect of keyway on the strength of the shaft.............

4
Examination: 2017 SUMMER
Que.No Question/Problem marks
Q 1a)(iii)

A hollow shaft for a rotary compressor is to be designed to transmit maximum torque of 4750 N-m. The shear stress in the shaft is limited to 50 MPa. Determine the inside outside diameter of the shaft if the ratio of inside to outside diameter of the shaft

8
Q 1b)(ii)

Design a bushed pin type flexible coupling for connecting a motor shaft to a pump shaft for the following service conditions. Power to be transmitted = 40 KW. Speed of the motor shaft = 1000 RPM. Diameter of the motor shaft = 50 mm Diameter of the pump sh

6
Q 2b)(ii)

Draw neat sketch of a protected type flanged coupling showing all details.

8
Q 3 e )

A shaft 30 mm. diameter is transmitting power.....................

4
Q 4a)(iii)

Explain effect of keyways on strength of shaft. Name one type of key which does not affect strength of shaft

4
Q 4b)(i)

(i) Explain different causes of gear tooth failure and suggest possible remedies to avoid such failures

6
Examination: 2017 WINTER
Que.No Question/Problem marks
Q 1 j )

State four types of keys.

2
Q 1 m )

What are the requirement of a good coupling?

2
Q 3 b )

In a rigid flaninged complended to transmit 20K.W at 700.r.p.m

8
Q 3 c )

What are the considerations in design of dimensions of formed and parallel key having rectangular cross section?

4
Q 6 a )

Effect of Keyway on strength of shaft

8
Q 6b)(ii)

Design consideration while designing the spur Gear

8
Q 6c)(ii)

Classification of shaft coupling :

8
Examination: 2016 SUMMER
Que.No Question/Problem marks
Q 1b)(ii)

The shaft running at 125 r.p.m. transmits 440 kW. Find the diameter of shaft (d) if allowable shear stress in shaft material is 55 N/mm2 and the angle of twist must not be more than 1 on a length of 16(d). The modulus of rigidity G = 0.80  105 N/mm

6
Q 1 iii )

State any four factors to be considered while selecting the coupling.

4
Q 2 c )

A belt pulley is fastened to a 90 mm diameter shaft running at 300 r.p.m. by means of a key 20 mm wide and 140 mm long. Allowable stress for the shaft and key material are 40 N/mm2 in shear and 100 N/mm2 in crushing. Find the power transmitted and the dep

8
Q 3 c )

Prove that, for a square key, the permissible crushing stress is twice the permissible shear stress.

4
Q 3 d )

Why a coupling should be placed as close to a bearing as possible

4
Q 4a)(ii)

State the effect of key-way on the strength of shaft with suitable diagram

4
Q 4b)(ii)

State any six design considerations while designing the spur gear

6
Examination: 2016 WINTER
Que.No Question/Problem marks
Q 1a)(iii)

Draw a neat sketch of flexible flange coupling and label its main components.

4
Q 1b)(ii)

A hollow shaft is required to transmit 50 kW power at 600 rpm. Calculate its inside and outside diameters if its ratio is 0.8. Consider yield strength of material as 380N/mm2 and factor of safety as 4.

6
Q 3 c )

State the ‘Lewis equation’ for spur gear design. State SI unit of each term in the equation.

4
Q 3 e )

Prove that for a square key sc = 2t where sc = crushing stress t = shear stress.

4
Q 4a)(iii)

State four important modes of gear failure.

4
Q 4b)(i)

Explain the design procedure of shaft on the basis of torsional rigidity. State the equation with SI units. State two applications of this approach.

6
Examination: 2015 WINTER
Que.No Question/Problem marks
Q 1a)(iii)

Write Lewis equation for strength of gear tooth. State the meaning of each term

4
Q 1b)(ii)

A shaft 1000 mm long is supported between two bearings. A pulley of 250 mm ...........

6
Q 2 a )

Explain the design procedure of handlever with neat sketch.

8
Q 2 b )

Explain the design procedure of bush pin type flexible coupling with neat sketch

8
Q 2c)(ii)

Design ‘‘C’’ clamp frame for a total clamping force of 20 kN............

8
Q 3 c )

Prove that for square key equally strong in shear and crushing, ....................

4
Q 3 e )

How keys are classified? Give detailed classification of keys with neat sketches; also state their applications.

4
Q 4b)(i)

State the different modes of failure of gear teeth and their possible remedies to avoid the failure.

6