⚙️Mechanical Engineering MCQs
Mechanical Engineering MCQs
488 MCQs271
Alcohol is used in manometers because___________________?
Ait has low vapour pressure
Bit is clearly visible
Cit has low surface tension
Dit can provide longer column due to low density E. is provides suitable meniscus
272
Specific weight of sea water is more that of pure water because it contains_________________?
Adissolved air
Bdissolved salt
Csuspended matter
Dall of the above E. heavy water
273
Free surface of a liquid tends to contract to the smallest possible area due to force of_______________?
Asurface tension
Bviscosity
Cfriction
Dcohesion E. adhesion
274
Falling drops of water become spheres due to the property of ____________________?
Aadhesion
Bcohesion
Csurface tension
Dviscosity E. compressibility
275
The total pressure on the surface of a vertical sluice gate 2 m x 1 m with its top 2 m surface being 0.5 m below the water level will be ________________?
A500 kg
B1000 kg
C1500 kg
D2000 kg E. 4000 kg
276
The buoyancy depends on___________________?
Amass of liquid displaced
Bviscosity of the liquid
Cpressure of the liquid displaced
Ddepth of immersion E. none of the above
277
Free surface of a liquid behaves like a sheet and tends to contract to smallest possible area due to the_________________?
Aforce of adhesion
Bforce of cohesion
Cforce of friction
Dforce of diffusion E. none of die above
278
Equivalent evaporation of water is the evaporation “for a feed water supply at 100°C__________________?
Aand its corresponding conversion into dry saturated steam at 100°C and 1.033 kg/cm2
Band its corresponding conversion into dry steam at desired boiler pressure
Cconversion into steam at atmospheric condition
Dconversion into steam at the same pres-sure at which feed water is supplied E. none of the above
279
Water boils when its vapour pressure ___________________?
Aequals that of the surroundings
Bequals 760 mm of mercury
Cequals to atmospheric pressure
Dequals the pressure of water in the container E. boiling has ^nothing to do with vapour pressure
280
The state of vapour under saturation condition is described by_______________?
Apressure alone
Btemperature alone
Cpressure and temperature
Dpressure and dryness fraction E. dryness fraction alone