Mechanical Engineering MCQs

2075 MCQs  (Page 104 of 208)

Attempt Mechanical Engineering Mcqs Quiz
The building up of worn and uridersized parts, subjected to repeated loads by electroplating is_____________________?
A. Best method
B. Extremely hazardous
C. Has no effect as regards fatigue strength
D. Cheapest method
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Which process will increase the fatigue duration of parts ?
A. Finishing and polishing
B. Shot-peening
C. Decarburisation
D. Electroplating
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In nitrated parts, the origins of the fatigue cracks will occur at__________________?
A. surface
B. just below the surface
C. within the core
D. could occur anywhere
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Cold working________________?
A. Increases the fatigue strength
B. Decreases the fatigue strength
C. Has no influence on fatigue strength
D. Alone has no influence on fatigue strength
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Residual stress in materials_________________?
A. Acts when external load is applied
B. Becomes zero when external load is removed
C. Is independent of external loads
D. Is always harmful
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The ratio of endurance limit in shear to the endurance limit in flexure is__________________________?
A. 0.33
B. 0.4
C. 0.5
D. 0.55
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Resistance to fatigue of a material is measured by________________?
A. young’s modulus
B. coefficient of elasticity
C. elastic limit
D. ultimate tensile strength
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For steel, the ultimate strength in shear as compared to ultimate strength in tension is ___________________?
A. same
B. 1/2
C. 1/3
D. 1/4
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At low temperatures (say 75°C) the notched-bar impact value of steel____________________?
A. Increases markedly
B. Decreases markedly
C. Remains same
D. Depends on heat treatment carried out
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The crest diameter of a screw thread is same as _____________________?
A. Major diameter
B. Minor diameter
C. Pitch diameter
D. Core diameter
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Word of the Day
29 Sep
Stern
(of a person or their manner) serious and unrelenting, especially in the assertion of authority and exercise of discipline.
سخت گیر، سخت ، کڑا

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