Practice Test: Question Set - 09
1. In a footstep bearing, if the speed of the shaft is doubled, then the torque required to overcome the viscous resistance will be
- (A) Double
- (B) Four times
- (C) Eight
times
- (D) Sixteen
times
2. The continuity equation is connected with
- (A) Open channel/pipe
flow
- (B) Compressibility of
fluids
- (C) Conservation of mass
- (D) Steady/unsteady flow
3. The most economical section of a trapezoidal channel is one which has hydraulic mean depth equal to
- (A) 1/2 × depth
- (B) 1/2 × breadth
- (C) 1/2 × sloping
side
- (D) 1/4 × (depth + breadth)
4. The speed of sound in a ideal gas varies directly as it’s
- (A) Absolute temperature
- (B) Temperature
- (C) Density
- (D) Modulus of elasticity
5. The absolute pressure is equal to
- (A) Gauge
pressure + atmospheric pressure
- (B) Gauge
pressure - atmospheric pressure
- (C) Atmospheric
pressure - gauge pressure
- (D) Gauge
pressure - vacuum pressure
6. Unit of surface tension is
- (A) Energy/unit area
- (B) Velocity/unit area
- (C) Both of the above
- (D) It has no units
7. A Piezometer tube is used only for measuring
- (A) Low pressure
- (B) High
pressure
- (C) Moderate
pressure
- (D) Vacuum
pressure
8. The capillary rise at 20°C in a clean glass tube of 1 mm bore containing water is approximately
- (A) 5 mm
- (B) 10 mm
- (C) 20 mm
- (D) 30 mm
9. The Cipoletti weir is a __________ weir.
- (A) Rectangular
- (B) Triangular
- (C) Trapezoidal
- (D) Circular
10. Pressure of the order of 10" torr can be measured by
- (A) Bourdon tube
- (B) Pirani Gauge
- (C) Micro-manometer
- (D) Lonisation gauge
11. The volume of a fluid __________ as the pressure increases.
- (A) Remains
same
- (B) Decreases
- (C) Increases
- (D) None of
these
12. Buoyant force is
- (A) The resultant force acting on a floating
body
- (B) The resultant force on a body due to the
fluid surrounding it
- (C) Equal to the volume of
liquid displaced
- (D) The force necessary
to maintain equilibrium of a submerged body
13. A flow through a long pipe at decreasing rate is called __________ uniform flow.
- (A) Steady
- (B) Unsteady
- (C) Both A and
B
- (D) None of
these
14. Choose the wrong statement
- (A) The center of buoyancy is located at the
center of gravity of the displaced liquid
- (B) For stability of a
submerged body, the center of gravity of body must lie directly below the
center of buoyancy
- (C) If C.G. and center of buoyancy coincide,
the submerged body must lie at neutral equilibrium for all positions
- (D) All floating bodies
are stable
15. The intensity of pressure at any point, in a liquid, is __________ to the depth of liquid from the surface.
- (A) Equal
- (B) Directly
proportional
- (C) Inversely
proportional
- (D) None
of these
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