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Mechanical Engineering Exam  >  Mechanical Engineering Tests  >  Design of Machine Elements  >  Test: Welded Joints Subjected To Bending Moments - Mechanical Engineering MCQ

Test: Welded Joints Subjected To Bending Moments - Mechanical Engineering MCQ


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10 Questions MCQ Test Design of Machine Elements - Test: Welded Joints Subjected To Bending Moments

Test: Welded Joints Subjected To Bending Moments for Mechanical Engineering 2024 is part of Design of Machine Elements preparation. The Test: Welded Joints Subjected To Bending Moments questions and answers have been prepared according to the Mechanical Engineering exam syllabus.The Test: Welded Joints Subjected To Bending Moments MCQs are made for Mechanical Engineering 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Welded Joints Subjected To Bending Moments below.
Solutions of Test: Welded Joints Subjected To Bending Moments questions in English are available as part of our Design of Machine Elements for Mechanical Engineering & Test: Welded Joints Subjected To Bending Moments 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: Welded Joints Subjected To Bending Moments | 10 questions in 20 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: Welded Joints Subjected To Bending Moments - Question 1
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The following bracket is welded to the vertical column. The joint undergoes torsional stresses.

Detailed Solution for Test: Welded Joints Subjected To Bending Moments - Question 1

Explanation: This joint undergoes bending stresses but not torsional stresses.

Test: Welded Joints Subjected To Bending Moments - Question 2
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 A bracket is shown welded to a vertical column by means of two fillet welds. The bending stress induced in the welds can be given by

Detailed Solution for Test: Welded Joints Subjected To Bending Moments - Question 2

Explanation: Formula.

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Test: Welded Joints Subjected To Bending Moments - Question 3
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Calculate the moment of inertia about the axis parallel to welds and shift it to CG by considering thickness of welds t.

Detailed Solution for Test: Welded Joints Subjected To Bending Moments - Question 3

Explanation: I=[50tᵌ/12 + (50t)x50² ] x 2, ignoring tᵌ term.

Test: Welded Joints Subjected To Bending Moments - Question 4
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Find the bending stress in the top weld is if thickness of weld is t. Given P=15kN and e=120mm.
Detailed Solution for Test: Welded Joints Subjected To Bending Moments - Question 4

Explanation: σ=My/I or M=15000×120, y=50 and I=250000t.

Test: Welded Joints Subjected To Bending Moments - Question 5
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Find the thickness of the weld is if allowable shear stress in the welds is 70N/mm². Given P=15kN and e=120mm.
Detailed Solution for Test: Welded Joints Subjected To Bending Moments - Question 5

Explanation: σ=My/I or M=15000×120, y=50 and I=250000t,τ₁=15000/100t or 150/t. Τ=√(σ/2)²+τ₁² or 234.3/t =70 or t=3.35mm and leg=3.35/0.707.

Test: Welded Joints Subjected To Bending Moments - Question 6
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The bracket welded to the vertical plate by means of two fillet welds. Calculate the bending stress in the welds if P=40kN, leg=4mm and e=400mm.
Detailed Solution for Test: Welded Joints Subjected To Bending Moments - Question 6

Explanation: σ=My/I where y=250mm,I=2xtx500ᵌ/12 where t=4/.707.

Test: Welded Joints Subjected To Bending Moments - Question 7
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The bracket welded to the vertical plate by means of two fillet welds. Calculate size of the welds if P=40kN, leg=4mm and e=400mm. Maximum permissible value of shear stress in the weld is 70N/mm².
Detailed Solution for Test: Welded Joints Subjected To Bending Moments - Question 7

Explanation: σ=My/I where y=250mm,I=2xtx500ᵌ/12 and τ₁=P/2xtx500.τ=√σ²+τ₁² or 104/t=70 and h=t/0.707.

Test: Welded Joints Subjected To Bending Moments - Question 8
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While calculating bending stress in the following welded joints which of the welds moment of inertia can be neglected?
Detailed Solution for Test: Welded Joints Subjected To Bending Moments - Question 8

Explanation: Moment of inertia of 1 & 3 can be neglected about their axes but while shifting it to CG, the term Al² cannot be neglected.

Test: Welded Joints Subjected To Bending Moments - Question 9
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If a circular shaft is welded to the plate by means of circumferential fillet, then the shaft is subjected to torsional moment M. If throat of weld is t, then torsional shear stress is given by
Detailed Solution for Test: Welded Joints Subjected To Bending Moments - Question 9

Explanation: Stress=Mr/J, here J=2πtrᵌ[I(xx)+I(yy)].

Test: Welded Joints Subjected To Bending Moments - Question 10
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 Magnetic crack detection method in the welds is destructible examination.
Detailed Solution for Test: Welded Joints Subjected To Bending Moments - Question 10

Examination: Magnetic crack detector passes magnetic waves through the sample and thus flux leakage is observed.

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