Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

Mechanical Engineering MCQs prepared for job test and interview preparation, especially for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover key topics such as Machine Design, Theory of Machines, Hydraulic Machines, and other important mechanical engineering concepts.

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

Review Detailed Answer

Correct Answer: best method

Yield point in fatigue loading as compared to static loading is__________________?

A same

B higher

C lower

D depends on other factors

Review Detailed Answer

Correct Answer: lower

The fatigue limit of a material____________________?

A is greatly decreased by poor surface conditions

B remains same irrespective of surface conditions

C depends mainly on core composition

D is dependent upon yield strength of material

Review Detailed Answer

Correct Answer: is greatly decreased by poor surface conditions

The ultimate strength of steel in tension in comparison to shear is in the ratio of__________________?

A 1 : l

B 2:1

C 3 : 2

D 2 : 3

Review Detailed Answer

Correct Answer: 3 : 2

The permissible stress for carbon steel under static loading is generally taken as__________________?

A 2000-3000 kg/pm2

B 3000-4000 kg/cm2

C 4000-4500 kg/cm2

D 7500-10,000 kg/cm2

Review Detailed Answer

Correct Answer: 4000-4500 kg/cm2

A hot short metal is_________________?

A brittle when cold

B brittle when hot

C brittle under all conditions

D ductile at high temperature

Review Detailed Answer

Correct Answer: brittle when hot

Rankine’s theory of failure is applicable for following type of materials___________________?

A brittle

B ductile

C elastic

D plastic

Review Detailed Answer

Correct Answer: brittle

Tensile strength of a mild steel specimen can be roughly predicted from following hardness test_________________?

A Brinell

B Rockwell

C Vicker

D Shore’s sceleroscope

Review Detailed Answer

Correct Answer: Brinell

In the case of an elastic bar fixed at upper end and loaded by a falling weight at lower end, the shock load produced can be decreased by_________________?

A decreasing the cross-section area of’ bar

B increasing the cross-section area of bar

C remain unaffected with cross-section area

D would depend upon other factors

Review Detailed Answer

Correct Answer: decreasing the cross-section area of’ bar

If a load W is applied instantaneously on a bar; then the stress induced in bar will___________________?

A be independent of ratio of mass of load W to mass of bar (y)

B increase with increase in y

C decrease with decrease in y

D depend on other considerations

Review Detailed Answer

Correct Answer: be independent of ratio of mass of load W to mass of bar (y)

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

The building up of worn and uridersized parts, subjected to repeated loads by electroplating is_____________________?

Yield point in fatigue loading as compared to static loading is__________________?

The fatigue limit of a material____________________?

The ultimate strength of steel in tension in comparison to shear is in the ratio of__________________?

The permissible stress for carbon steel under static loading is generally taken as__________________?

A hot short metal is_________________?

Rankine’s theory of failure is applicable for following type of materials___________________?

Tensile strength of a mild steel specimen can be roughly predicted from following hardness test_________________?

In the case of an elastic bar fixed at upper end and loaded by a falling weight at lower end, the shock load produced can be decreased by_________________?

If a load W is applied instantaneously on a bar; then the stress induced in bar will___________________?