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Test: Longitudinal Butt & Circumferential Lap Joints - Mechanical Engineering MCQ


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10 Questions MCQ Test - Test: Longitudinal Butt & Circumferential Lap Joints

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

 Corrosion allowance is the metal removed to reduce the thickness required to withstand internal pressure.

Detailed Solution for Test: Longitudinal Butt & Circumferential Lap Joints - Question 1

Explanation: corrosion allowance is the extra metal added to increase the thickness.

Test: Longitudinal Butt & Circumferential Lap Joints - Question 2

The rivets in outer row of longitudinal boiler shell butt joint are subjected to double shear.

Detailed Solution for Test: Longitudinal Butt & Circumferential Lap Joints - Question 2

Explanation: Rivets in middle and inner row are subjected to double shear and in outer row are subjected to single shear.

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Test: Longitudinal Butt & Circumferential Lap Joints - Question 3

 Calculate the thickness of the strap required in longitudinal butt joint if pitch of the rivets is 150mm and diameter of rivets 30mm. Also thickness of plate is 20mm.

Detailed Solution for Test: Longitudinal Butt & Circumferential Lap Joints - Question 3

Explanation: t=0.625t[p-d/p-2d].

Test: Longitudinal Butt & Circumferential Lap Joints - Question 4

 A cylindrical pressure vessel with a 2m wide inside diameter is subjected to internal steam pressure of 1.5Mpa. Calculate the thickness of the plate required if corrosion allowance is considered as 2mm. The permissible value of tensile stress is 80N/mm².

Detailed Solution for Test: Longitudinal Butt & Circumferential Lap Joints - Question 4

Explanation: t=PD/2σ + CA or t=1.5×2000/2×80 + 2.

Test: Longitudinal Butt & Circumferential Lap Joints - Question 5

If number of rivets subjected to single shear per pitch length is 2 and those subjected to double shear per pitch length are 3, then find the shear resistance of rivets is diameter of rivets is 20mm and permissible shear 60N/mm².

Detailed Solution for Test: Longitudinal Butt & Circumferential Lap Joints - Question 5

Explanation: P=Axτxn₁+2xAxn₂xτ.

Test: Longitudinal Butt & Circumferential Lap Joints - Question 6

Longitudinal and circumferential both types of joints try to make a ring from the steel plate.

Detailed Solution for Test: Longitudinal Butt & Circumferential Lap Joints - Question 6

Explanation: Longitudinal joint makes a ring from the steel plate while circumferential connects one ring to the other.

Test: Longitudinal Butt & Circumferential Lap Joints - Question 7

Number of rivets in the circumferential joint can be found by which formula? Symbols have their usual meanings.

Detailed Solution for Test: Longitudinal Butt & Circumferential Lap Joints - Question 7

Explanation: nx[πd²τ/4]=[πD²/4]xP.

Test: Longitudinal Butt & Circumferential Lap Joints - Question 8

The efficiency of circumferential joint is 62%. Calculate the pitch of circumferential joint if diameter of rivets is 25mm.

Detailed Solution for Test: Longitudinal Butt & Circumferential Lap Joints - Question 8

Explanation: 0.62=p-25/p.

Test: Longitudinal Butt & Circumferential Lap Joints - Question 9

Calculate the efficiency of the circumferential joint if pitch of rivets is 60mm and diameter of rivets is 22mm.

Detailed Solution for Test: Longitudinal Butt & Circumferential Lap Joints - Question 9

Explanation: Effeciency=p-d/p.

Test: Longitudinal Butt & Circumferential Lap Joints - Question 10

 Unwin’s formula is used to find _____ of rivets.

Detailed Solution for Test: Longitudinal Butt & Circumferential Lap Joints - Question 10

Explanation: d=6√t is unwin’s formula.

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