mechanical engineering MCQs – Page 138

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 Review each marked answer and report any item that may be outdated or unclear.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

2741. Hardness of steel depends on_________________?
0

A. the quality of ore from which it is made

B. contents of alloying elements

C. method of fabrication

D. amount of carbon it contains

E. the shape and distribution of the car-bides in iron

2742. Balls for ball bearings are made of_________________?
0

A. stainless steel

B. carbon-chrome steel

C. high carbon steel

D. mild steel

E. cast iron

2743. Bell metal contains_____________________?
0

A. 85-92% copper and rest tin with little lead and nickel

B. 70-75% copper and rest tin

C. 70% copper and 30% zinc

D. 70-75% copper and rest zinc and tin

E. 90% copper and 10% tin

2744. Solder is an alloy consisting of________________?
0

A. lead and copper

B. tin and copper

C. tin and lead

D. tin, antimony, copper

E. lead and zinc

2745. Maximum percentage of carbon in austenite is______________?
0

A. 1.7%.

B. 1.25%

C. 0.80%

D. 0.26%

E. 0.03%

2746. Aluminium bronze contains aluminium and copper in the ratio of___________________?
0

A. 50:50:00

B. 60:40:00

C. 90:10:00

D. 40 : 60

E. 10 : 90

2747. Youngs modulus is defined as the ratio of ___________________?
0

A. longitudinal stress and lateral strain

B. longitudinal stress and longitudinal strain

C. shear stress to shear strain

D. lateral stress and lateral strain

E. volumetric stress and volumetric strain

2748. Which is the false statement about true stress-strain method______________?
0

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.

E. It can be used for compression tests as well.

2749. If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either___________________?
0

A. all the above are correct

B. be all parallel

C. meet in a point

D. none of the above

E. at least two of them must meet

2750. Diamond riveted joint can be adopted in the case of following type of joint _____________________?
0

A. double riveted lap joints

B. butt joint

C. none of the above

D. lap joint

E. all types of joints

2751. The deformation of a bar under its own weight compared to the deformation of same body subjected to a direct load equal to weight of the body is_______________?
0

A. one-fourth

B. four times

C. half

D. double

E. same

2752. Which of the following has no unit __________________?
0

A. bulk modulus

B. surface tension

C. strain

D. elasticity

E. kinematic viscosity

2753. The stress induced in a body due to suddenly applied load compared to when it is applied gradually is________________?
0

A. none of the above

B. two times

C. same

D. four times

E. half

2754. The buckling load for a given material depends on___________________?
0

A. Poissons ratio and modulus of elasticity

B. slenderness ratio, area of cross-section and modulus of elasticity

C. slenderness ratio and area of cross-section

D. Poissons ratio and slenderness ratio

E. slenderness ratio and modulus of elasticity

2755. If a material expands freely due to heating it will develop ____________________?
0

A. bending

B. no stress

C. thermal stresses

D. tensile stress

E. compressive stress

2756. Deformation per unit length in the direction of force is known as_________________?
0

A. lateral strain

B. linear stress

C. unit strain

D. strain

E. linear strain

2757. In a tensile test, near the elastic limit zone, the______________?
0

A. tensile strain increases in proportion to the stress

B. tensile strain decreases in proportion to the stress

C. tensile strain remains constant

D. tensile strain decreases more quickly

E. tensile strain increases more quickly

2758. The maximum frictional force which comes into play when a body just begins to slide over another surface is called________________?
0

A. dynamic friction

B. limiting friction

C. sliding friction

D. kinematic friction

E. rolling friction

2759. In actual machines_____________________?
0

A. mechanical advantage is equal to velocity ratio

B. mechanical advantage is unity

C. none of the above

D. mechanical advantage is less than velocity ratio

E. mechanical advantage is greater than velocity ratio

2760. The property of a material by virtue of which a body returns to its original, shape after removal of the load is called____________________?
0

A. malleability

B. resilience

C. ductility

D. plasticity

E. elasticity

Previous Next

Showing 2741 to 2760 of 4266 mcqs