MCQs

Mechanical Engineering MCQs with Explanations

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661Mechanical EngineeringMedium

Which tool is used to measure gap size in a rough alignment?

ADial indicator

BMeasuring tape

CFeeler gage

DInside caliper

Correct answer

D. Inside caliper

Explanation

The correct answer is Inside caliper.

662Mechanical EngineeringMedium

Which of the following is the unit of kinematic viscosity ________?

Apoise

Bstoke

Cnone of the above

Dfaraday

Epascal

Correct answer

B. stoke

Explanation

The correct answer is stoke.

663Mechanical EngineeringMedium

Working principle of dead weight pressure gauge tester is based on________?

ASecond law of thermodynamic

BPascal’s law

CDalton’s law of partial pressure

DAvogadro’s hypothesis

ENewton’s law of viscosity.

Correct answer

B. Pascal’s law

Explanation

The correct answer is Pascal’s law.

664Mechanical EngineeringMedium

Heat transfer in liquid and gases takes place by________?

Aconvection and radiation

Bconduction and convection

Cconvection

Dconduction

Eradiation

Correct answer

C. convection

Explanation

The correct answer is convection.

665Mechanical EngineeringMedium

In PERT analysis, critical path is obtained by joining events having________?

Adummy activities

Bcritical activities

Czero sldck

D+ve slack

Correct answer

C. zero sldck

Explanation

The correct answer is zero sldck.

666Mechanical EngineeringMedium

Choose the wrong statement?

AAll floating bodies are stable

BFor stability of floating cylinders or spheres, the e.g. of body must lie below the center of buoyancy

CThe center of buoyancy is located at the center of gravity of the displaced liquid

DIf e.g. and center of buoyancy coincide, the submerged body must lie at neutral equilibrium for all positions

EFor stability of a submerged body, the center of gravity of body must lie directly below the center of buoyancy

Correct answer

A. All floating bodies are stable

Explanation

The correct answer is All floating bodies are stable.

667Mechanical EngineeringMedium

Installation of supercharger on a four-cycle diesel engine can result in the following percentage increase in power________?

Aupto 100%.

Bupto 75%

Cupto 25%

Dupto 35%

Eupto 50%

Correct answer

A. upto 100%.

Explanation

The correct answer is upto 100%..

668Mechanical EngineeringMedium

In order to obtain bolt of uniform strength________?

Aincrease its length

Bincrease shank diameter

Call of the above

Dtighten die bolt properly

Edrill an axial hole through head up to threaded portion so that shank area is equal to root area of thread

Correct answer

E. drill an axial hole through head up to threaded portion so that shank area is equal to root area of thread

Explanation

The correct answer is drill an axial hole through head up to threaded portion so that shank area is equal to root area of thread.

669Mechanical EngineeringMedium

The center of gravity of a triangle lies at the point of ________?

Aall of the above

Bconcurrence of the medians

Cintersection of bisector of angles

Dintersection of its altitudes

Eintersection of diagonals

Correct answer

B. concurrence of the medians

Explanation

The correct answer is concurrence of the medians.

670Mechanical EngineeringMedium

Which is false statement about tempering. Tempering is done to________?

Aimprove toughness

Breduce hardness and brittleness

Cimprove ductility

Drelease stresses

Eimprove machinability

Correct answer

E. improve machinability

Explanation

The correct answer is improve machinability.

Choose the wrong statement?

AAll floating bodies are stable

BFor stability of floating cylinders or spheres, the e.g. of body must lie below the center of buoyancy

CThe center of buoyancy is located at the center of gravity of the displaced liquid

DIf e.g. and center of buoyancy coincide, the submerged body must lie at neutral equilibrium for all positions

EFor stability of a submerged body, the center of gravity of body must lie directly below the center of buoyancy

Correct answer

A. All floating bodies are stable

Explanation

The correct answer is All floating bodies are stable.

In order to obtain bolt of uniform strength________?

Aincrease its length

Bincrease shank diameter

Call of the above

Dtighten die bolt properly

Edrill an axial hole through head up to threaded portion so that shank area is equal to root area of thread

Correct answer

E. drill an axial hole through head up to threaded portion so that shank area is equal to root area of thread

Explanation

The correct answer is drill an axial hole through head up to threaded portion so that shank area is equal to root area of thread.