# For self locking which of the following condition is satisfied

1.   ≥ α

2.  ? ≤ α

3.  Both (a) and (b)

4.   None of these

4

≥ α

Explanation :
No Explanation available for this question

# For overhauling which of the following condition is satisfied

1.   ≥ α

2.  ? ≤ α

3.  Both (a) and (b)

4.  None of these

4

? ≤ α

Explanation :
No Explanation available for this question

# Which of the following is Trapezoidal thread

1.  Acme

2.  Square

3.  Buttress

4.  All of these

4

Acme

Explanation :
No Explanation available for this question

# Backlash in spur gear is the

1.  Difference between the addendum of one gear and the addendum of the mating gear

2.  Difference between the tooth space of the gear and the tooth thickness of the mating gear measured on the pitch circle

3.  Intentional extension of centre distance between two gears

4.  Does not exist

4

Difference between the tooth space of the gear and the tooth thickness of the mating gear measured on the pitch circle

Explanation :
No Explanation available for this question

# For the bracket bolted as shown in the above load figure, the bolts will develop

1.  Primary tensile stresses and secondary shear stresses

2.  Primary shear and secondary shear stresses

3.  Primary shear stresses and secondary tensile stresses

4.  Primary tensile stresses and secondary compressive stresses

4

Primary shear and secondary shear stresses

Explanation :
No Explanation available for this question

# The key shown in the figure is

1.  Barth key

2.  Kennedy key

3.  Lewis key

4.   Woodruff key

4

Barth key

Explanation :
No Explanation available for this question

# The frictional torque for square thread at mean radius while raising load is given by (W = load, Rm = mean radius, = angle of friction, α = helix angle)

1.  WRm tan ( – α)

2.  WRm tan (? + α)

3.  WRo tan α

4.  WRo tan ?

4

WRm tan (? + α)

Explanation :
No Explanation available for this question

# Consider the following statements: For increasing the fating strength of welded joints, it is necessary to employ (1) Grinding (2) Coating (3) Hammer preening Of the above statements

1.  1 and 2 are correct

2.  2 and 3 are correct

3.  1 and 3 are correct

4.  1, 2 and 3 are correct

4

1 and 3 are correct

Explanation :
No Explanation available for this question

# The efficiency of self-locking screw is

1.  More than 50 %

2.  Less than 50 %

3.  Equal to 50 %

4.  None of these

4

Less than 50 \%

Explanation :
No Explanation available for this question

# The efficiency of overhauling screw is

1.  ≥ 50 %

2.  ≤ 50 %

3.  Equal to 50 %

4.  None of these

4