mechanical engineering MCQs – Page 85

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 Review each marked answer and report any item that may be outdated or unclear.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

1681. Corrosion resistance of steel is increased by adding__________________?
0

A. chromium and nickel

B. none of the above

C. nickel and molybdenum

D. tungsten and sulfur

E. aluminium and zinc

1682. Acidic solution is one which has pH value__________________?
0

A. equal to 7

B. none of the above

C. greater than 7

D. less than 7

E. pH value has nothing to do with neutral solution

1683. Tungsten in steel________________?
0

A. raises its melting point

B. gives ductility, toughness, tensile strength and anticorrosion properties

C. improves wear resistance, cutting ability and toughness

D. improves cutting ability and reduces hardenability

E. refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties

1684. Which of the following is used for bearing liner_______________?
0

A. bronze

B. gun metal

C. brass

D. bell metal

E. babbit metal

1685. High carbon steel carries carbon %age c_________________?
0

A. 0.8 to 1.5%

B. 0.6 to 0.8%

C. 0.1 to 0.3%

D. 1.5 to 2.5%.

E. 0.3 to 0.6%

1686. Super conduction by metals is observed in the temperature range of_________________?
0

A. around 0C

B. around 100C

C. above 100K

D. above 1000C

E. below 10K

1687. A cold chisel is made of_______________?
0

A. mild steel

B. high carbon

C. H.S.S.

D. cast iron

E. german silver

1688. Which of the following meters is not associated with viscosity____________________?
0

A. Engler

B. Orsat

C. Say bolt

D. none of the above

E. Red wood

1689. Heavy duty leaf and coil spring* contain carbon of the following order ________________?
0

A. 1.5%.

B. 1.0%

C. 0.80%

D. 0.50%

E. 0.20%

1690. Dynamic viscosity of most of the liquids with rise in temperature__________________?
0

A. none of the above

B. remains unaffected

C. unpredictable

D. increases

E. decreases

1691. Corrundum contains more than 95% _____________________?
0

A. MgO

B. Si02

C. steel

D. A1203

E. german silver

1692. Hardness of upper bainite (acicular structure) is about___________________?
0

A. RC 57

B. RC 32.

C. RC 80

D. RC 65

E. RC 48

1693. The percentage of carbon in grey iron castings usually varies between __________________?
0

A. 2.5 to 4.5%

B. 5 7%

C. 0.5 to 1%

D. 1 2%

E. 7-9%.

1694. German silver contains_________________?
0

A. 100% silver

B. 10% silver

C. 1% silver

D. 2.5% silver

E. 5% silver

1695. In grey cast iron, carbon is present in the form of____________________?
0

A. cementite

B. free carbon

C. nodular aggregates of graphite

D. flakes

E. spheroids

1696. When a body floating in a liquid, is displaced slightly, it oscillates about _________________?
0

A. center of pressure

B. center of buoyancy

C. liquid surface

D. e.g. of body

E. metacentre

1697. Mercury does not wet glass. This is due to property of liquid known as__________________?
0

A. compressibility

B. cohesion

C. viscosity

D. adhesion

E. surface tension

1698. A balloon lifting in air follows the following principle_____________________?
0

A. continuity equation

B. all of the above

C. Archimedes principle

D. principle of buoyancy

E. law of gravitation

1699. Which one of the following metals would work-harden more quickly than the others__________________?
0

A. lead

B. aluminium

C. copper

D. brass

E. silver

1700. Age-hardening is related with______________?
0

A. duralumin

B. german silver

C. cast iron

D. gun metal

E. stainless steel

Previous Next

Showing 1681 to 1700 of 4266 mcqs