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Test: Design of Bearings Level - 1 - Mechanical Engineering MCQ


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15 Questions MCQ Test Design of Machine Elements - Test: Design of Bearings Level - 1

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

In thrust bearing, the load acts

Test: Design of Bearings Level - 1 - Question 2

If the load on a ball bearing is reduced to half, the life of the ball bearing will be B

Detailed Solution for Test: Design of Bearings Level - 1 - Question 2

Given, Initially, w1 = w

Life = L1

After half of load, w2 =w/2

Life = L2

Considering the relation,

Lw3 = c

L2 = 8L1 times

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Test: Design of Bearings Level - 1 - Question 3

Which of the following is not the part of roller bearing?

Test: Design of Bearings Level - 1 - Question 4

The life of bearing is expressed in

Detailed Solution for Test: Design of Bearings Level - 1 - Question 4

Life of bearings is generally expressed as millions of revolution.

Test: Design of Bearings Level - 1 - Question 5

Spherical roller bearings are normally used

Test: Design of Bearings Level - 1 - Question 6

Antifriction bearings are termed as

Test: Design of Bearings Level - 1 - Question 7

The rolling element bearings are

Test: Design of Bearings Level - 1 - Question 8

In a journal bearing P = average bearing pressure, Z = absolute viscosity of the lubricant, N = rotational speed of the journal. The bearing characteristic number is given by

Test: Design of Bearings Level - 1 - Question 9

With a dynamic load capacity of 2.2 kN, a roller bearing can operate at 600 rpm for 2000 hours. Then its maximum radial load will be equal to

Detailed Solution for Test: Design of Bearings Level - 1 - Question 9

Given: Dynamic load capacity (C) = 2.2 kN

Life of bearing (Lf) = 60 x N x time duration

= 60 x 600 x 2000

= 72 x 106 revolutions

Using the following relation,

K = Constant = 3.3

On solving, we get, w = 609.8 (approx)

Test: Design of Bearings Level - 1 - Question 10

A sliding bearing that can support steady loads without any relative motion between the journal and the bearing is called as

Test: Design of Bearings Level - 1 - Question 11

The expected life of a ball bearing subjected to a load of 9800 N and working at 1000 rpm is 3000 hours. Then the expected life of the same bearing for a similar load of 4900 N and speed of 2000 rpm will be

Detailed Solution for Test: Design of Bearings Level - 1 - Question 11

Given: Load(w1 9800 N

Speed(N1) = 100 rpm

(Life) (L1)time duration = 3000 hours

Now, if load (w2) = 4900 N

Speed(N2) = 2000rpm

Then life(L2) = ?

Considering the following,

Test: Design of Bearings Level - 1 - Question 12

The dynamic load capacity of 6306 bearing is 22 kN. The maximum radial load it can sustain to operate at 600 rev/min, for 2000 hours will be equal to

Detailed Solution for Test: Design of Bearings Level - 1 - Question 12

Given:dynamic load capacity = 22 x 103 N

Speed(N) = 600 rav/min

Life = 2000 x 60 x 600

72 x 106 rev

Using following relation,

w = 5288.24 N

w = 5.288 kN

Test: Design of Bearings Level - 1 - Question 13

Which of the following assumptions regarding the lubricant film is made in Petroff’s equation?

Test: Design of Bearings Level - 1 - Question 14

In hydrodynamic bearings

Test: Design of Bearings Level - 1 - Question 15

The rated life of a bearing varies

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