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GATE 2020: Machine Design Quiz 5

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Question 1

Which of the following stresses are associated with the tightening of a nut on a stud?

1) Tensile stresses due to stretching of stud.

2) Bending stresses of stud.

3) Transverse shear stresses across threads.

4) Torsional shear stresses in threads due to frictional resistance.

Select the correct answer using the codes give below:

Question 2

Consider the following statements regarding welded joints:
1). It is permanent type of joint.
2). It is reliable and economical for pressure vessel constructicn.
3). It is free from fabricational residual stresses.
4). Such joints are suitable for static loading only.
5). Welding is a versatile and flexible metal joining processes.
Which of the statements are correct?

Question 3

A bolted joint has four bolts arranged as shown in figure. The cross sectional area of each bolt is 25 mm². A torque T = 200 N-m is acting on the joint. Neglecting friction due to clamping force, maximum shear stress in a bolt is_____ MPa.

Question 4

A horizontal plate has been joined to a vertical post using four rivets arranged as shown in the figure. The magnitude of the load on the worst loaded rivet (in N) is

Question 5

A cantilever bracket is bolted to a column using three M12×1.75 bolts P, Q and R. The value of maximum shear stress developed in the bolt P (in MPa) is______ ( Take core diameter as 0.8 times of nominal diameter).

Question 6

A bolted joint is shown below. The maximum shear stress, in MPa, in the bolts at A and B, respectively are
$Description: D:\GradeStack Courses\GATE Tests (Sent by Ravi)\GATE ME 18-Mar\GATE-ME-2007_files\image099.png$
(all dimensions in the figure are in mm )

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ESE & GATE ME Machine Design

Jan 22ESE & GATE ME