A loaded semi-infinite flat plat is having an elliptical hole (A/B = 2) in the middle as shown in the figure. The stress concentration factors at points either X or Y is

1.  1

2.  3

3.  5

4.  7

View Answer  
4
Correct Answer :

7


Explanation :
No Explanation available for this question

A transmission shaft subjected to bending loads must be designed on the basis of

1.  Maximum normal stress theory

2.  Maximum shear stress theory

3.  Maximum normal stress and maximum shear stress theories

4.  Fatigue strength

View Answer  
4
Correct Answer :

Maximum normal stress theory


Explanation :
No Explanation available for this question

Determine the minimum value of the basic dynamic load rating for selecting ball bearing to 5000 hrs of operations with not more than 10 % failures. The radial load is 1800 N during 90 % of the time and 7200 N during the remaining 10 %. The sheet is rotated at 150 rev/min

1.  12.45 kN

2.  25 kN

3.  13.45 kN

4.  14.25 kN

View Answer  
4
Correct Answer :

12.45 kN


Explanation :
No Explanation available for this question

In a belt-drive if the pulley diameter is doubled keeping the tension and belt width constant, then it will be necessary to

1.  Increase the key length

2.  Increase the key depth

3.  Increase the key width

4.  Decrease the key length

View Answer  
4
Correct Answer :

Increase the key width


Explanation :
No Explanation available for this question

In the assembly of pulley, key and shaft

1.  Pulley is made the weakest

2.  Key is made the weakest

3.  Key is made the strongest

4.  All the three are designed for equal strength

View Answer  
4
Correct Answer :

Key is made the weakest


Explanation :
No Explanation available for this question

A circular shaft can transmit a torque of 5 kNm. If the torque is reduced to 4 kNm, then the maximum value of bending moment that can be applied to the shaft is

1.  1 kNm

2.  2 kNm

3.  3 kNm

4.  4 kNm

View Answer  
4
Correct Answer :

3 kNm


Explanation :
No Explanation available for this question

The shock absorbing capacity of a bolt can be increased by

1.  Tightening it properly

2.  Increasing shank diameter

3.  Grinding the shank

4.  Using washer

View Answer  
4
Correct Answer :

Grinding the shank


Explanation :
No Explanation available for this question

To resist breaking of the plate in front of the rivet, we make the distance from the centre of the rivet to the edge of the plate at least

1.  1.5 d

2.  2.5 d

3.  2 d

4.  3 d

View Answer  
4
Correct Answer :

1.5 d


Explanation :
No Explanation available for this question

The longitudinal joint in a boiler shell is usually

1.  Butt joint

2.  Lap joint

3.  Butt joint with two covers plates

4.  Butt joint with single cover plate

View Answer  
4
Correct Answer :

Butt joint with two covers plates


Explanation :
No Explanation available for this question

B.S.W threads have the angle equal to

1.  550

2.  600

3.  200

4.  580

View Answer  
4
Correct Answer :

550


Explanation :
No Explanation available for this question
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