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Mechanical Engineering Practice Questions
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Mechanical Engineering Practice Questions
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25 Questions

1. A phenomenon ismodelled using n dimensionalvariables with k primarydimensions. The number ofnon-dimensional variable is
2. Flux used in cupola duringmelting of cast Iron is
3. Maximum fluctuation ofenergy is the
4. A thin walled cylindricalpressure vessel having aradius of 0.5 m and wallthickness 25 mm is subjectedto an internal pressure of 700kPa. The hoop stressdeveloped is
5. Main function of cuttingfluid is to
6. A simple pendulum oflength 5 m - with a bob ofmass 1 kg - is in simpleharmonic motion. As it passesthrough its mean position - thebob has a speed of 5 m/s. Thenet force on the bob at themean position is
7. An involute pinion andgear are in mesh. If both havethe same size of addendum - then there will be aninterference between the
8. A cube shaped castingsolidifies in 5 min. Thesolidification time in min for acube of the same material - which is 8 times heavier thanthe original casting - will be
9. The frictional torquetransmitted in a flat pivotbearing assuming uniformwear
10. Pressure in Pascals at adepth of 1 m below the freesurface of a body of water willbe equal to
11. Internal gear cuttingoperation can be performed by
12. A plug gauge is used formeasuring
13. An involute pinion andgear are in mesh. If both havethe same size of addendum - then there will be aninterference between the
14. A plug gauge is used formeasuring
15. Chips are brokeneffectively due to which of thefollowing property
16. In an air standard ottocycle - the pressure in thecylinder at 30% and 70% ofthe compression stroke are1.3 bar and 2.6 barrespectively. Assuming thatcompression follows the lawPV1.3 = constant - what willbe the air standard efficiencyof cycle
17. Brayton cycle can not beused in reciprocating enginesfor same adiabaticcompression ratio and workoutput because
18. The quality of ameasuring instrument whichcharacteristics the ability torespond to small change ofthe quantity measured iscalled
19. Mobility of a staticallyindeterminate structure is
20. Electrochemicalmachining is performed toremove material from an ironsurface of 20 mm × 20 mmunder the following conditionsIn for electrode gap = 0.2 mmSupply voltage DC = 12 VSpecific resistance of = 2Wcm electrolyte Atomic weightof iron = 55.85 Valency of iron= 2 Faraday-Ÿs constant =96500 C/ mol The materialremoval rate (in g/s) is
21. For a Newtonian fluid
22. In a mechanism - the fixedinstantaneous centres arethose centres which
23. The capillary rise in anarrow two-dimensional slit ofwidth w-Ÿ is
24. Ratio of moment of inertiaof a circular body about its xaxis to that about y-axis is
25. Which of the following is apositive locking device?

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