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Bearings - Mechanical Engineering - 2


10 Questions MCQ Test Machine Design | Bearings - Mechanical Engineering - 2


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

Teflon is used for bearings because of

Solution:
QUESTION: 2

When the length of the journal is equal to the diameter of the journal, then the bearing is said to be a

Solution:

L = D → square bearing,
L < D → short bearing
L > D → long bearing

QUESTION: 3

Thrust bearings of the sliding type are often provided with multiple sector-shaped bearing pads of the tilting type instead of a continuous annular bearing surface in order to

Solution:
QUESTION: 4

Deep groove ball bearings are used for
Solution:

Deep groove ball bearing takes loads in the radial as well as axial direction. Due to relatively large size of the balls, deep groove ball bearing has high load carrying capacity. It gives excellent performance in high speed application due to less resultant temperature rise.

QUESTION: 5

 A journal bearing of diameter 30 cm and length 50 cm carries a load of 150 kN, The average bearing pressure is
Solution:

QUESTION: 6

Which one of the following is the lubrication regime during normal operation of a rolling element bearing?
Solution:

Except option (c), others are the lubrication regime for sliding contact bearing.

QUESTION: 7

What is the approximate frictional power loss in a single radial ball bearing having a bore diameter of 60 mm and subjected to a radial load of 25 kN? The shaft rotates at 600 rpm.
Take f = 0.0015
Solution:

Frictional torque,

QUESTION: 8

A bearing has a specific dynamic radial capacity of 40 kN. What equivalent radial load P can the bearing carry at 400 rpm, if the desired life H is 5000 hours for 90% of the bearings?
Solution:

Life in revolutions = (5000 x 60) min x 400 rev/ min = 120 x 106 rev
Life in millions of revoutions = (C/P)3

QUESTION: 9

To carry a large axial load in a flat bearing, a number of collars is provided to
Solution:

Bearing pressure,

where n is number of collars.

QUESTION: 10

The listed life of a rolling bearing, in a catalogue, is the
Solution:

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