Mechanical Engineering MCQs

2075 MCQs  (Page 165 of 208)

True one-dimensional flow occurs when_________________?
A. The direction and magnitude of the veiocity at all points are identical
B. The velocity of successive fluid par-ticles, at any point, is the same at suc-cessive periods of time
C. The magnitude and direction of the velocity do not change from point to point in the fluid
D. The fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane
In an immersed body, centre of pressure is __________________?
A. At the centre of gravity
B. Above the centre of gravity
C. Below be centre of gravity
D. Could be above or below e.g. depend¬ing on density of body and liquid
Gradually varied flow is__________________?
A. Steady uniform
B. Non-steady non-uniform
C. Non-steady uniform
D. Steady non-uniform
Rotameter is a device used to measure______________?
A. Absolute pressure
B. Velocity of fluid
C. Flow
D. Rotation