Test: Threaded Joints & Power Screws - 2


10 Questions MCQ Test Design of Machine Elements | Test: Threaded Joints & Power Screws - 2


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This mock test of Test: Threaded Joints & Power Screws - 2 for Mechanical Engineering helps you for every Mechanical Engineering entrance exam. This contains 10 Multiple Choice Questions for Mechanical Engineering Test: Threaded Joints & Power Screws - 2 (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Threaded Joints & Power Screws - 2 quiz give you a good mix of easy questions and tough questions. Mechanical Engineering students definitely take this Test: Threaded Joints & Power Screws - 2 exercise for a better result in the exam. You can find other Test: Threaded Joints & Power Screws - 2 extra questions, long questions & short questions for Mechanical Engineering on EduRev as well by searching above.
QUESTION: 1

The resultant axial load on a bolt depends upon
1. external load applied
2. initial tension due to tightening of bolt
3. relative elastic yielding of the bolt and connected member
Which of the above statements are correct?

Solution:


where, P = resultant load
P1 = initial tension due to tightening of bolt
P2 = external load
m, b = relative elatsic yielding (m/N)

QUESTION: 2

A bolt is to be used for making a fluid tight joint steam engine cover plates. Which of the following relation is used for initial tension (in N) in the bolt?
where d is the nominal bolt diameter in mm.

Solution:
QUESTION: 3

The most important dimension in the design of nut is its

Solution:

For standard coarse threads, the threads are equally strong in failure by shear and failure by tension, if the height of the nut is approximately 0.4 times of the nominal diameter of the bolt. The height of the standard hexagonal nut is 0.8 d. The threads of the bolt in the standard nut will not fail by shear. So, height of nut is. most important design dimension.

QUESTION: 4

Select the incorrect statement:

Solution:

The Acme threads are usually formed on the spindles of bench vices.

QUESTION: 5

 Identify the wrong statement:

Solution:

A coupler or turnbuckle is used for connecting two members which are subjected to tensile loading and which require slight adjustment in length.

QUESTION: 6

Which of the following locking devices has the widest application in automobile industry?

Solution:

Castle nut is extensively on jobs subjected to sudden shocks and considerable vibration such as in automobile industry.

QUESTION: 7

Two shafts are connected by means of a flange coupling to transmit torque of 25 N-m. The flanges of the coupling are fastened by four bolts of the same material at a radius of 30 mm. What is the size of bolts if the allowable shear stress for the botl material is 30 MPa?

Solution:




∴ 

QUESTION: 8

The designation M 33 x 2 of a bolt means

Solution:
QUESTION: 9

For bolts of uniform strength, the shank diameter is made equal to

Solution:

Bolt of uniform strength are made by
1. Reducing the diameter of shank of bolt corresponding to that of minor diameter.
2. Making a hole and making the area of shank equal to root area.

QUESTION: 10

How can shock absorbing capacity of a bolt be increased

Solution:

By reducing the shank diameter to the core diameter, the shank of the bolt will undergo a higher stress. This means that the shank will absorb a large portion of energy.

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