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Mechanical Engineering Exam  >  Mechanical Engineering Tests  >  Design of Machine Elements  >  Test: Shaft Design - Mechanical Engineering MCQ

Test: Shaft Design - Mechanical Engineering MCQ


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15 Questions MCQ Test Design of Machine Elements - Test: Shaft Design

Test: Shaft Design for Mechanical Engineering 2024 is part of Design of Machine Elements preparation. The Test: Shaft Design questions and answers have been prepared according to the Mechanical Engineering exam syllabus.The Test: Shaft Design MCQs are made for Mechanical Engineering 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Shaft Design below.
Solutions of Test: Shaft Design questions in English are available as part of our Design of Machine Elements for Mechanical Engineering & Test: Shaft Design solutions in Hindi for Design of Machine Elements course. Download more important topics, notes, lectures and mock test series for Mechanical Engineering Exam by signing up for free. Attempt Test: Shaft Design | 15 questions in 30 minutes | Mock test for Mechanical Engineering preparation | Free important questions MCQ to study Design of Machine Elements for Mechanical Engineering Exam | Download free PDF with solutions
Test: Shaft Design - Question 1
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While designing shaft on the basis of torsional rigidity, angle of twist is given by?

Detailed Solution for Test: Shaft Design - Question 1

Explanation: θ=(180/π)xMl/GJ where J=πd⁴/32.

Test: Shaft Design - Question 2
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According to ASME code, maximum allowable shear stress is taken as X% of yield strength or Y% of ultimate strength.

Detailed Solution for Test: Shaft Design - Question 2

Explanation: ASME Standard. The lesser value is taken among the two.

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Test: Shaft Design - Question 3
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 Does ASME Standard take into consideration shock and fatigue factors?

Detailed Solution for Test: Shaft Design - Question 3

Explanation: Moment is multiplied by a number to consider these factors while designing the shaft.

Test: Shaft Design - Question 4
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The layout of a shaft supported on bearings at A & B is shown. Power is supplied by means of a vertical belt on pulley B which is then transmitted to pulley C carrying a horizontal belt. The angle of wrap is 180’ and coefficient of friction is 0.3. Maximum permissible tension in the rope is 3kN. The radius of pulley at B & C is 300mm and 150mm.

Q. Calculate the torque supplied to the shaft.
Detailed Solution for Test: Shaft Design - Question 4

Explanation: M=(P₁-P₂)xR where P₁=3000N, P₂=P₁/e^(Coeff of friction x Angle of wrap).

Test: Shaft Design - Question 5
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The layout of a shaft supported on bearings at A & B is shown. Power is supplied by means of a vertical belt on pulley B which is then transmitted to pulley C carrying a horizontal belt. The angle of wrap is 180’ and coefficient of friction is 0.3. Maximum permissible tension in the rope is 3kN. The radius of pulley at B & C is 300mm and 150mm.

Q. Calculate the tension in the rope of pulley C.
Detailed Solution for Test: Shaft Design - Question 5

Explanation: (P₃-P₄)x150=549.3×1000 and P₃/P₄=2.6. Hence P₃=5948.15N and P₄=2288.75N.

Test: Shaft Design - Question 6
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The layout of a shaft supported on bearings at A & B is shown. Power is supplied by means of a vertical belt on pulley B which is then transmitted to pulley C carrying a horizontal belt. The angle of wrap is 180’ and coefficient of friction is 0.3. Maximum permissible tension in the rope is 3kN. The radius of pulley at B & C is 300mm and 150mm.

Q. 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.
Detailed Solution for Test: Shaft Design - Question 6

Explanation: 70=(16/πdᵌ)x√M²+m².

Test: Shaft Design - Question 7
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The layout of a shaft supported on bearings at A & B is shown. Power is supplied by means of a vertical belt on pulley B which is then transmitted to pulley C carrying a horizontal belt. The angle of wrap is 180’ and coefficient of friction is 0.3. Maximum permissible tension in the rope is 3kN. The radius of pulley at B & C is 300mm and 150mm.

Q.  If bending moment on point B in horizontal plate is M and in vertical plane is m, then the net bending moment at point B is?
Detailed Solution for Test: Shaft Design - Question 7

Explanation: The two moments act perpendicularly to each other.

Test: Shaft Design - Question 8
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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.
Detailed Solution for Test: Shaft Design - Question 8

Explanation: d⁴=584Ml/Gθ.

Test: Shaft Design - Question 9
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If yielding strength=400N/mm², the find the permissible shear stress according to ASME standards.
Detailed Solution for Test: Shaft Design - Question 9

Explanation: 0.18×400.

Test: Shaft Design - Question 10
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The stiffness of solid shaft is more than the stiffness of hollow shaft with same weight.
Detailed Solution for Test: Shaft Design - Question 10

Explanation: Hollow shaft is more stiff.

Test: Shaft Design - Question 11
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The strength of hollow shaft is more than the strength of solid shaft of same weight.
Detailed Solution for Test: Shaft Design - Question 11

Explanation: Outer fibers are more effective in resisting the applied moments. In hollow shafts material is removed and spread on a larger radius.

Test: Shaft Design - Question 12
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Solid shaft is costlier than hollow shaft of same weight.
Detailed Solution for Test: Shaft Design - Question 12

Explanation: Hollow shaft cost is more as material is to be selectively emplaced.

Test: Shaft Design - Question 13
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Solid shafts are used in epicyclic gearboxes.
Detailed Solution for Test: Shaft Design - Question 13

Explanation: In epicyclic gears, one shaft rotates inside other and hence hollow shafts are used.

Test: Shaft Design - Question 14
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Flexible shafts have ___ rigidity in torsion making them flexible.
Detailed Solution for Test: Shaft Design - Question 14

Explanation: Flexible shafts have high rigidity in torsion making then capable to transmit torque.

Test: Shaft Design - Question 15
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Flexible shafts have ______ rigidity in bending moment.
Detailed Solution for Test: Shaft Design - Question 15

Explanation: Flexible shafts have low rigidity in bending moments making them flexible.

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Important Questions for Shaft Design

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Shaft Design MCQs with Answers

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