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Test: Balancing - 1 - Mechanical Engineering MCQ


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10 Questions MCQ Test - Test: Balancing - 1

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

At a particular rotational speed, the unbalanced force due to revolving mass

Detailed Solution for Test: Balancing - 1 - Question 1

Magnitude = mω2r .
It direction is perpendicular to the perphering of rotational envelope in the same plane which changes at every angle.

Test: Balancing - 1 - Question 2

Unbalance in high speed rotating machine parts may be due to
1. imperfect machining
2. non-symmetry of parts
3. non-homogeneity of materials
4. in accuracy of pitch of blades

Which of these statements are correct?

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Test: Balancing - 1 - Question 3

Consider a 6 tonnes rotor of a steam turbine running at 8000 rpm out to the extent of 0.2 cm. The centrifugal force tending to lift the turbine from its foundations will be about

Detailed Solution for Test: Balancing - 1 - Question 3

Test: Balancing - 1 - Question 4

Consider a mass m attached at radius r from the axis of shaft which rotates with an angular velocity ω. The balancing is achieved by mounting a B kg mass at radius bfrom the axis of shaft. If the speed of shaft is doubled, then to attain perfect balance, the value of mass B should be

Detailed Solution for Test: Balancing - 1 - Question 4

∴ The value of balancing mass does not depend upon speed of rotation.

Test: Balancing - 1 - Question 5

For balancing a single disturbing mass, the minimum number of balance masses required to be introduced in a piane parallel to the plane of rotation of the disturbing mass will be

Detailed Solution for Test: Balancing - 1 - Question 5

Test: Balancing - 1 - Question 6

Which one of the following can completely balance several masses revolving in different planes on a shaft?

Detailed Solution for Test: Balancing - 1 - Question 6

Two balancing masses in different planes can completely balance several masses revolving in different planes.

Test: Balancing - 1 - Question 7

A system of masses rotating in different parallel planes is in dynamic balance if the resultant

Detailed Solution for Test: Balancing - 1 - Question 7

Condition for dynamic balancing ∑F = 0 and ∑M = 0.

Test: Balancing - 1 - Question 8

A system in dynamic balance implies that

Test: Balancing - 1 - Question 9

Unbalanced force is produced due to eccentricity in the foliowing, except

Test: Balancing - 1 - Question 10

if the planes of rotation of the three masses are parallel, then the balance mass B1 is

Detailed Solution for Test: Balancing - 1 - Question 10

16 × 50 = B1 × 40 + B2 × 60

⇒ 4B1 + 6B2 = 80

B1 × 40 × 50 = B2 × 60 × 75

⇒ B2 = 0.44B1

Now, 6.667B1 = 80

⇒ B1 = 12 kg

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