Mechanical Engineering MCQs

2075 MCQs  (Page 101 of 208)

Attempt Mechanical Engineering Mcqs Quiz
If an unsupported uniform cross sectional elastic bar is subjected to a longitudinal impact from a rigid bob moving with velocity v, then a compressive wave of intensity sc is propagated through the bar as follows______________________?
A. Vpe
B. Vvvf
C. Wpe/2
D. Ivhpe
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Resilience of a material is important, when it is subjected to________________?
A. combined loading
B. fatigue
C. thermal stresses
D. wear and tear
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Other method of reducing shock load in the above case can be_________________?
A. To decrease length
B. To increase length
C. Unaffected by length
D. Other factors would decide same
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Brittle coating technique is used for_________________?
A. Determining brittleness
B. Protecting metal against corrosion
C. Protecting metal against wear and tear
D. Experimental stress analysis
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The endurance limit of a material with finished surface in comparison to rough surface is_________________?
A. More
B. Less
C. Same
D. More or less depending on quantum of load
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The maximum stress due to stress concentration in a bar having circular transverse hole, as compared to its static stress without hole will be_________________?
A. Same in both cases
B. 2 times more
C. 3 times more
D. 4 times more
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Stress concentration in static loading is more serious in__________________?
A. Ductile materials
B. Brittle materials
C. Equally serious in both cases
D. Depends on other factors
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Endurance limit or fatigue limit is the maximum stress that a member can withstand for an infinite number of load applications without failure when subjected to________________?
A. Dynamic loading
B. Static loading
C. Combined static and dynamic loading
D. Completely reversed loading
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Which of the following is not correct procedure to increase the fatigue limit_______________?
A. Cold working
B. Shot peening
C. Surface decarburisation
D. Under-stressing
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Stress concentration in static loading is_________________?
WhiCh is correct statement ?
D. None of these
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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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