⚙️Mechanical Engineering MCQs
Mechanical Engineering MCQs
488 MCQs251
Fluid is a substance that___________________?
Acannot be subjected to shear forces
Balways expands until it fills any container
Chas the same shear stress.at a point regardless of its motion
Dcannot remain at rest under action of any shear force E. flows
252
Practical fluids___________________?
Aare viscous
Bpossess surface tension
Care compressible
Dpossess all the above properties E. possess none of the above properties
253
If no resistance is encountered by displacement, such a substance is known as ___________________?
Afluid
Bwater
Cgas
Dperfect solid E. ideal fluid
254
Density of water is maximum at__________________?
A0°C
B0°K
C4°C
D100°C E. 20°
255
Property of a fluid by which its own molecules are attracted is called___________________?
Aadhesion
Bcohesion
Cviscosity
Dcompressibility E. surface tension
256
The property of a fluid which enables it to resist tensile stress is known as___________________?
Acompressibility
Bsurface tension
Ccohesion
Dadhesion E. viscosity
257
The specific weight of water is 1000 kg/m”_________________?
Aat normal pressure of 760 mm
Bat 4°C temperature
Cat mean sea level
Dall the above E. none of the above
258
Surface energy per unit area of a surface is numerically equal to _____________________?
Aatmospheric pressure
Bsurface tension
Cforce of adhesion
Dforce of cohesion E. viscosity
259
The difference of pressure between the inside and outside of a liquid drop is _______________?
Ap = Txr
Bp = T/r
Cp = T/2r
Dp = 2T/r E. none of the above
260
To avoid vaporisation in the pipe line, the pipe line over the ridge is laid such that it is not more than____________________?
A2.4 m above the hydraulic gradient
B6.4 m above the hydraulic gradient
C10.0 m above the hydraulic gradient
D5.0 above the hydraulic gradient E. none of the above