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Test: Bearings - 2 - Mechanical Engineering MCQ


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10 Questions MCQ Test - Test: Bearings - 2

Test: Bearings - 2 for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Test: Bearings - 2 questions and answers have been prepared according to the Mechanical Engineering exam syllabus.The Test: Bearings - 2 MCQs are made for Mechanical Engineering 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Bearings - 2 below.
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Test: Bearings - 2 - Question 1

Teflon is used for bearings because of

Test: Bearings - 2 - Question 2

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

Detailed Solution for Test: Bearings - 2 - Question 2

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

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Test: Bearings - 2 - 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

Test: Bearings - 2 - Question 4

Deep groove ball bearings are used for

Detailed Solution for Test: Bearings - 2 - Question 4

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.

Test: Bearings - 2 - Question 5

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

Detailed Solution for Test: Bearings - 2 - Question 5

Test: Bearings - 2 - Question 6

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

Detailed Solution for Test: Bearings - 2 - Question 6

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

Test: Bearings - 2 - 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

Detailed Solution for Test: Bearings - 2 - Question 7

Frictional torque,

Test: Bearings - 2 - 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?

Detailed Solution for Test: Bearings - 2 - Question 8

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

Test: Bearings - 2 - Question 9

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

Detailed Solution for Test: Bearings - 2 - Question 9

Bearing pressure,

where n is number of collars.

Test: Bearings - 2 - Question 10

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

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