mechanical engineering MCQs – Page 30

Practise multiple-choice questions from mechanical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

mechanical engineering Mcqs

1. compressors gas turbines and jet engines 2. theory of machines 3. nuclear power plants 4. engineering materials 5. strength of materials mechanical engineering 6. thermodynamics 7. heat transfer 8. i c engines 9. steam boilers engines nozzles and turbines 10. engineering mechanics 11. fluid mechanics mechanical engineering 12. production technology 13. machine design 14. hydraulic machines 15. workshop technology 16. refrigeration and air conditioning

581. Poissons ratio is defined as the ratio of_________________?
0

A. none of the above

B. lateral stress and longitudinal stress

C. longitudinal stress and longitudinal strain

D. longitudinal stress and lateral stress

E. lateral stress and lateral strain

582. To transmit power from one rotating shaft to another whose axes are neither parallel nor intersecting, use__________________?
0

A. crown gear

B. spiral gear

C. bevel gear

D. spur gear

E. worm gear

583. Diamond riveted joint can be adopted in the case of following type of joint _____________________?
0

A. butt joint

B. none of the above

C. all types of joints

D. double riveted lap joints

E. lap joint

584. The example of higher pair is_________________?
0

A. none of the above

B. gears, cams

C. ball and roller bearings

D. all of the above

E. belt, rope and chain drives

585. Freon group of refrigerants are___________________?
0

A. non-toxic and non-inflammable

B. inflammable

C. non-toxic and inflammable

D. non-inflammable and toxic

E. toxic

586. The co-efficient of friction depends upon _________________?
0

A. shape of the surfaces

B. ail of the above.

C. A. and B. above

D. area of contact

E. nature of surfaces

587. A slider crank chain consists of following numbers of turning and sliding pairs_________________?
0

A. 4, 0

B. I, 3

C. 2, 2

D. 3, 1

E. 0, 4

588. Vertical lines on pressure-enthalpy chart show constant_______________?
0

A. entropy lines

B. temperature lines

C. total heat lines

D. pressure lines

E. volume lines

589. A cylindrical section having no joint is known as ____________________?
0

A. perfect section

B. manufactured section

C. seamless section

D. jointless section

E. homogeneous section

590. If n = number of members andy = number of joints, then for a perfect frame, n =________________?
0

A. 2j-l

B. j-2

C. 2/-3

D. 3/-2

E. 2/ -4

591. A material capable of absorbing large amount of energy before fracture is known as________________?
0

A. plasticity

B. ductility

C. toughness

D. shock proof

E. resilience

592. If a heat pump cycle operates between the condenser temperature of +27C and evaporator temperature of 23C, then the Carnot COP will be_________________?
0

A. 5

B. 1.2

C. 0.2

D. 10

E. 6

593. A mechanism is an assemblage of ____________________?
0

A. three links

B. two links

C. none of the above

D. all of the above

E. four links or more than four links

594. The energy absorbed in a body, when it is strained within the elastic limits, is known as________________?
0

A. toughness

B. strain energy

C. modulus of resilience

D. resilience

E. proof resilience

595. The ultimate tensile stress of mild steel compared to ultimate compressive stress is__________________?
0

A. same

B. less

C. more

D. more or less depending on other factors

E. unpredictable

596. Which of the following mechanism is obtained from lower pair________________?
0

A. generated straight line motions

B. gyroscope

C. valve and valve gears

D. pantograph

E. all of the above

597. The materials having same elastic properties in all directions are called________________?
0

A. paractical materials

B. elastic materials

C. isotropic materials

D. uniform materials

E. ideal materials

598. Shaft revolving in a bearing is the following type of pair________________?
0

A. cylindrical pair

B. bearing pair

C. lower pair

D. spherical pair,

E. higher pair

599. The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is________________?
0

A. four times

B. half

C. double

D. same

E. one fourth

600. Dynamic friction as compared to static friction is __________________?
0

A. has no correlation

B. same

C. less

D. more

E. may be less of more depending on nature of surfaces and velocity

Previous Next

Showing 581 to 600 of 4266 mcqs