MCQs Mechanical Engineering
1. An example of amorphous material is
(a) Zinc
(b) Lead
(c )Glass
(d) Sulphur
Ans. C
2. Which metal coating is used in the mirror ?
(a) Lead
(b) Tin
(c )Gold
(d) Brass
Ans. B
3. Brass is an alloy of
(a) Copper and Zinc
(b ) Copper and Tin
(c ) Arsenic and Tin
(d) Gold and Tin
Ans. A
4. Which among the following is the most effective strengthening mechanism of non-ferrous materials ?
(a) Solid solution hardening
(b) Strain hardening
(c ) Grain size refinement
(d) Precipitaion hardening
Ans. D
5. Which of the following is an amorphous material ?
(a) Lead
(b) Brass
(c )Glass
(d) Silver
Ans. C
6. How much percentage of chromium is present in high speed steel which is specified by designation 18-4-1 ?
(a) 4
(b) 18
(c )1
(d) None of the above
Ans. A
7. The material commonly used for air craft gas turbine is
(a) High alloy steel
(b) Duralumin
(c ) Zinc
(d) Titanium
Ans. B
8. Under which loading condition, brittle material will generally fall along surfaces forming 45
angle with longitudinal axis ?(a) Tension
(b) Torision
(c ) Comperssion
(d) Any one of the above
Ans. B
9. Which of the following property is increased by adding sulphur is steel ?
(a) hardness
(b) Corrosive resistance
(c ) wear resistance
(d) machinablility
Ans. D
10. An example of Amorphous material is
(a) Lead
(b) Silver
(c ) Glass
(d) Brass
Ans. C