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 buckling load for a given material depends on___________________?

A slenderness ratio and area of cross-section

B Poisson’s ratio and modulus of elasticity

C slenderness ratio and modulus of elasticity

D slenderness ratio, area of cross-section and modulus of elasticity

Review Detailed Answer

Correct Answer: slenderness ratio, area of cross-section and modulus of elasticity

The value of modulus of elasticity for mild steel is of the order of________________?

A 2.1xl05 kg/cm2

B 2.1 X 106 kg/cm2

C 2.1 x 107 kg/cm2

D 0.1 xlO6 kg/cm2 (<?) 3.8 x 106 kg/cm2

Review Detailed Answer

Correct Answer: 2.1 X 106 kg/cm2

If a part is constrained to move and heated, it will develop ____________________?

A principal stress

B tensile stress

C compressive stress

D shear stress

Review Detailed Answer

Correct Answer: compressive stress

Which is the false statement about true stress-strain method______________?

A It does not exist

B It is more sensitive to changes in both metallurgical and mechanical conditions

C It gives, a more accurate picture of the ductility

D It can be correlated with stress-strain values in other tests like torsion, impact, combined stress tests etc.

Review Detailed Answer

Correct Answer: It does not exist

For steel, the ultimate strength in shear as compared to in tension is nearly _________________?

A same

B half

C one-third

D two-third

Review Detailed Answer

Correct Answer: half

True stress-strain curve for materials is plotted between__________________?

A load/original cross-sectional area and change in length/original length

B load/instantaneous cross-sectional area original area and log

C load/instantaneous cross-sectional area and change in length/original length

D load/instantaneous area and instantaneous area/original area

Review Detailed Answer

Correct Answer: load/instantaneous cross-sectional area original area and log

Percentage reduction of area in performing tensile test on cast iron may be of the order of__________________?

A 50%

B 25%

C 0%

D 15%

Review Detailed Answer

Correct Answer: 0%

The impact strength of a material is an index of its ___________________?

A toughness

B tensile strength

C capability of being cold worked

D hardness

Review Detailed Answer

Correct Answer: toughness

Strain is defined as the ratio of__________________?

A change in volume to original volume

B change in length to original length

C change in cross-sectional area to original cross-sectional area

D any one of the above

Review Detailed Answer

Correct Answer: any one of the above

The materials having same elastic properties in all directions are called________________?

A ideal materials

B uniform materials

C isotropic materials

D paractical materials

Review Detailed Answer

Correct Answer: isotropic materials

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

The buckling load for a given material depends on___________________?

The value of modulus of elasticity for mild steel is of the order of________________?

If a part is constrained to move and heated, it will develop ____________________?

Which is the false statement about true stress-strain method______________?

For steel, the ultimate strength in shear as compared to in tension is nearly _________________?

True stress-strain curve for materials is plotted between__________________?

Percentage reduction of area in performing tensile test on cast iron may be of the order of__________________?

The impact strength of a material is an index of its ___________________?

Strain is defined as the ratio of__________________?

The materials having same elastic properties in all directions are called________________?