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Design of Machine Elements MCQs: 197 Questions & Answers in Engineering

197 Design of Machine Elements MCQs in Engineering with answers & explanations. Page 4. Practice objective questions for competitive exams, interviews & self… Use the answer toggle below to show or hide all solutions, tap an option to check one question, or open a question for its own page.

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Design of Machine Elements MCQs: 197 Questions & Answers in Engineering

Sliding contact bearings, also called plain bearings have no problem of wear.

Modulus of resilience is defined as

In gear boxes and small size motors, rolling contact bearings are used.

There is problem of alignment in deep groove ball bearings.

Cylindrical load bearing has lower load capacity as compared to deep groove ball bearing.

Deep groove ball bearing has immense rigidity.

The angular play bearing must be mounted without axial play.

Angular contact bearing can take thrust as well as radial loads.

Which of the following cannot tolerate misalignment?

Taper rolling supports

Straight bevel gears are easy to design and manufacture and give reasonably good service with quieter operation.

Cylinder roller creates lesser noise than deep groove ball bearing.

Which of the following creates smoother motion?

When the pitch angle is greater than 90⁰, it is called external bevel gear.

If pitch angle is >90, the bevel gear is?

If allowable shear stress in the shaft is 70N/mm² and torsional and bending moments are M=1185000N-mm and m=330000N-mm, find the diameter of the shaft.

Calculate the shaft diameter on rigidity basis if torsional moment is 196000N-mm, length of shaft is 1000mm. Permissible angle of twist per meter is 0.5’ and take G=79300N/mm².

The stiffness of solid shaft is more than the stiffness of hollow shaft with same weight.

Solid shaft is costlier than hollow shaft of same weight.

Flexible shafts have rigidity in torsion making them flexible.

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