mechanical engineering MCQs – Page 79

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 Review each marked answer and report any item that may be outdated or unclear.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

1561. Work study comprises following main techniques_________________?
0

A. method study and job evaluation

B. method study and time study

C. value analysis and work measurement

D. method study and work measurement

E. time study and work measurement

1562. Detonation is caused by the following unstable compounds______________________?
0

A. none of the above

B. peroxides, aldehydes, oxides and sul-phides

C. peroxides, aldehydes and ketones

D. aldehydes, oxides and ketones

E. ketones and sulphur compounds

1563. The function of a distributor in an automobile is to__________________?
0

A. regulate power

B. feed lub oil to all moving parts

C. distribute charge, equally to all the cylinders

D. inject fuel at appropriate time

E. time the spark

1564. The part load efficiency of a carburettor is,___________________?
0

A. Poor

B. Constant

C. Maximum

D. Optimum

1565. If overhead clearance is less, then the following type of engine should be selected__________________?
0

A. V-type

B. In-line

C. Radial

D. Vertical

E. Horizontal

1566. For same power and same speed, the flywheel of a four stroke engine as compared to two-stroke I.C. engine will be________________?
0

A. same size

B. dependent on other engine parameters

C. unpredictable

D. smaller

E. bigger

1567. In perpetual inventory control, the material is checked as it reaches its__________________?
0

A. average value

B. minimum value

C. middle value

D. maximum value

E. alarming value

1568. If petrol is used in a diesel engine, then______________?
0

A. low power will be produced

B. lot of fuel will remain unburnt

C. black smoke will be produced

D. efficiency will be low

E. higher knocking will occur

1569. Liquids_________________?
0

A. none of the above

B. are not affected by change in pressure and temperature

C. cannot be compressed

D. occupy definite volume

E. are not viscous

1570. Corrosion resistance of steel is increased by addition of________________?
0

A. tungsten, molybdenum, vanadium, chromium

B. vanadium, aluminium

C. sulphur, phosphorus, lead

D. chromium and nickel

E. zinc

1571. If mercury in a barometer is replaced by water, the height of 3.75 cm of mercury will be following cm of water________________?
0

A. 52.2 cm

B. 51 cm

C. 52 cm

D. 51.7 cm

E. 50 cm

1572. The conditions for the stable equilibrium of a floating body are___________________?
0

A. none of the above is correct

B. a righting couple should be formed

C. the meta-center should lie above the center of gravity

D. the center of buoyancy and the center of gravity must lie on the same vertical line

E. all the above are correct

1573. The ultimate tensile strength of low carbon steel by working at a high strain rate will_________________?
0

A. first increase and then decrease

B. remain constant

C. decrease

D. first decrease and then increase

E. increase

1574. A pressure of 25 m of head of water is equal to_________________?
0

A. 245 kN/m2

B. 2500 kN/m2

C. 2.5kN/m2

D. 25 kN/m2

E. 12.5 kN/m2

1575. Which of the following instrument can be used for measuring speed of an aeroplane___________________?
0

A. Orifice plate

B. Venturimeter

C. rotameter

D. pitot tube

E. hot wire anemometer

1576. Elinvar, an alloy used in precision instruments, hair springs for watches, etc. contains the following element as principal alloying element__________________?
0

A. iron

B. aluminium

C. zinc

D. nickel

E. copper

1577. Cast iron has_________________?
0

A. high ductility

B. all of the above

C. high tensile strength

D. none of the above

E. its elastic limit close to the ultimate breaking strength

1578. The usual composition of a soldering alloy is__________________?
0

A. tin, copper and lead

B. tin, lead and silver

C. tin, lead and small percentage of antimony

D. tin and copper

E. tin and lead

1579. Resultant pressure of the liquid in the case of an immersed body acts through____________________?
0

A. centre of buoyancy

B. in between e.g. and centre of pressure

C. centre of gravity

D. centre of pressure

E. metacentre

1580. Maximum percentage of carbon in austenite is______________?
0

A. 0.03%

B. 0.80%

C. 0.26%

D. 1.25%

E. 1.7%.

Previous Next

Showing 1561 to 1580 of 4266 mcqs