The critical value at which crack extension occurs is called

A)
Toughness
B)
Fracture Toughness
C)
Stress Intensity Factor
D)
None of the above

Correct Answer : Option (B) :   Fracture Toughness

Explanation : Fracture toughness is the critical value of stress intensity at which crack extension occurs.

Recently Updated in Machine Design Questions
Which type of rope drum is preferred?
A)
Drums with helical grooves
B)
Plain cylindrical drums
C)
Both are equally preferred
D)
None of the above

Correct Answer :   Drums with helical grooves

Explanation : They have more bearing surface of the drum and prevent friction between adjacent turns of the rope.

Small sheaves are preferred over large sheaves on what parameters?
A)
Higher cost of small sheaves
B)
Increasingly centrifugal force in large sheaves
C)
Preferring centrifugal force reduction even for more money
D)
None of the above

Correct Answer :   Increasingly centrifugal force in large sheaves

Explanation : Larger sheaves have higher centrifugal forces and higher cost because more material is used in their construction.

The wire rope is subjected to
A)
Tensile Stress
B)
Bending Stress
C)
Both bending and tensile stress
D)
None of the above

Correct Answer :   Both bending and tensile stress

Explanation : There is direct tensile stress due to load being raised as well as bending stress.

Mechanical Engineering MCQ's

Theory of Machines
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Strength of Materials
Engineering Materials
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Thermodynamics
Engineering Drawing
Workshop Technology
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