⚙️Mechanical Engineering MCQs
Mechanical Engineering MCQs
488 MCQs211
Working principle of dead weight pressure gauge tester is based on_______________?
APascal’s law
BDalton’s law of partial pressure
CNewton’s law of viscosity .
DAvogadro’s hypothesis E. Second law of thermodynamic
212
Center of pressure compared to e.g. is___________________?
Aabove it
Bbelow it
Cat same point
Dabove or below depending on area of body E. none of the above
213
The resultant upward pressure of the fluid on an immersed body due to its tendency to uplift the sub-merged body is called_______________?
Aupthrust
Breaction
Cbuoyancy
Dmetacentre E. center of pressure
214
A body floats in stable equilibrium ____________________?
Awhen its meatcentric height is zero
Bwhen the metancentre is above e.g.
Cwhen its e.g. is below it’s center of buoyancy
Dmetacentre has nothing to do with position of e.g. for determining stability E. none of the above
215
The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at the centriod, if___________________?
Athe area is horizontal
Bthe area is vertical
Cthe area is inclined
Dall of the above E. none of the above
216
The depth of the center of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is____________________?
A2.4 m
B3.0 m
C4.0 m
D”2.5 m E. 5.0 m
217
The flow in which the particles of a fluid attain such velocities that vary from point to point in magnitude and direction as well as from instant to instant, is known as__________________?
Aone dimensional flow
Buniform flow
Csteady flow
Dturbulent flow E. streamline flow
218
Two dimensional flow occurs when________________?
Athe direction and magnitude of the velocity at all points are identical
Bthe velocity of successive fluid particles, at any point, is the same at successive periods of time
Cthe magnitude and direction of the velocity do not change from point to point in the fluid
Dthe fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane E. velocity, depth, pressure, etc. change from point to point in the fluid flow
219
A piece of wood having weight 5 kg floats in water with 60% of its volume under the liquid. The specific gravity of wood is _________________?
A0.83
B0.6
C0.4
D0.3 E. none of the above
220
In a free vortex motion, the radial component of velocity everywhere is________________?
Amaximum
Bminimum
Czero
Dnon-zero and finite E. unpredictable