Practice Test: Question Set - 05
1. Differential manometer is used to measure
- (A) Pressure in pipes,
channels etc.
- (B) Atmospheric pressure
- (C) Very low pressure
- (D) Difference of
pressure between two points
2. When a body is immersed wholly or partially in a liquid, it is lifted up by a force equal to the weight of liquid displaced by the body. This statement is called
- (A) Pascal's
law
- (B) Archimedes’s
principle
- (C) Principle
of flotation
- (D) Bernoulli's
theorem
3. Non uniform flow occurs when
- (A) The direction and
magnitude of the velocity at all points are identical
- (B) The velocity of
successive fluid particles, at any point, is the same at successive periods of
time
- (C) Velocity, depth,
pressure, etc. change from point to point in the fluid flow
- (D) The fluid particles move in plane or
parallel planes and the streamline patterns are identical in each plane
4. When a tube of smaller diameter is dipped in water, the water rises in the tube with an upward __________ surface.
- (A) Concave
- (B) Convex
- (C) Plane
- (D) None
of these
5. A piece of metal of specific gravity 7 floats in mercury of specific gravity 13.6. What fraction of its volume is under mercury?
- (A) 0.5
- (B) 0.4
- (C) 0.515
- (D) 0.5
6. A flow through an expanding tube at constant rate is called
- (A) Steady
uniform flow
- (B) Steady
non-uniform flow
- (C) Unsteady
uniform flow
- (D) Unsteady
non-uniform flow
7. Reynolds number is significant in
- (A) Supersonics, as with
projectile and jet propulsion
- (B) Full immersion or completely enclosed flow,
as with pipes, aircraft wings, nozzles etc.
- (C) Simultaneous motion
through two fluids where there is a surface of discontinuity, gravity forces,
and wave making effect, as with ship's hulls
- (D) All of the above
8. The loss of head due to friction in a pipe of uniform diameter in which a viscous flow is taking place, is (where RN = Reynold number)
- (A) 1/RN
- (B) 4/RN
- (C) 16/RN
- (D) 64/RN
9. Practical fluids
- (A) Are viscous
- (B) Possess surface
tension
- (C) Are compressible
- (D) Possess all the above
properties
10. A compound pipe of diameter d1, d2 and d3 having lengths l1, l2 and l3 is to be replaced by an equivalent pipe of uniform diameter d and of the same length (l) as that of the compound pipe. The size of the equivalent pipe is given by
- (A) l/d² = (l₁/d₁²) + (l₂/d₂²) + (l₃/d₃²)
- (B) l/d³
= (l₁/d₁³) + (l₂/d₂³) + (l₃/d₃³)
- (C) l/d⁴ = (l₁/d₁⁴) + (l₂/d₂⁴) + (l₃/d₃⁴)
- (D) l/d⁵ = (l₁/d₁⁵) + (l₂/d₂⁵) + (l₃/d₃⁵)
11. The tendency of a liquid surface to contract is due to the following property
- (A) Cohesion
- (B) Adhesion
- (C) Viscosity
- (D) Surface tension
12. The Newton's law of resistance is based on the assumption that the
- (A) Planes
of the body are completely smooth
- (B) Space
around the body is completely filled with the fluid
- (C) Fluid
particles do not exert any influence on one another
- (D) All
of the above
13. For manometer, a better liquid combination is one having
- (A) Higher surface
tension
- (B) Lower surface tension
- (C) Surface tension is no
criterion
- (D) High density and
viscosity
14. The flow in a pipe is neither laminar nor turbulent when Reynold number is
- (A) Less
than 2000
- (B) Between
2000 and 2800
- (C) More
than 2800
- (D) None
of these
15. The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as
- (A) Meta center
- (B) Center of pressure
- (C) Center of buoyancy
- (D) Center of gravity
Next Tests: