Discussion
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- Question
Water displaced by a floating wooden block of density 0.75, 5 m long, 2 m wide and 3 m high, is
Options- A. 17.5 m3
- B. 20.0 m3
- C. 22.5 m3
- D. 25 km3.
- Correct Answer
- 22.5 m3
- 1. The velocity distribution of viscous fluid through a circular/pipe is :
Options- A. hyperbolic
- B. circular
- C. parabolic
- D. elliptical. Discuss
- 2. Kinematic viscosity of liquids by equation
is determined by :
Options- A. Redwood viscometer
- B. Engler viscometer
- C. Saybolt universal viscometer
- D. None of these. Discuss
- 3. For the most economical trapezoidal open channel,
Options- A. half of the top width must be equal to one of the sloping sides
- B. the hydraulic mean depth must be equal to half the depth of flow
- C. the semicircle drawn with top width as diameter must touch the three sides of the channel
- D. All of these. Discuss
- 4. Mercury is generally used in barometers because
Options- A. its vaour pressure is practically zero
- B. the height of the barometer will be less
- C. it is a best liquid
- D. both (a) and (b) above
- E. both (b) and (c) above. Discuss
- 5. The ratio of the percentagge error in the discharge and percentage error in the measurement of head over a triangular notch, is
Options- A. 2/3
- B. 3/2
- C. 2/5
- D. 5/2 Discuss
- 6. If the forces are due to inertia and gravity, and frictional resistance plays only a minor role, the design of the channels is made by comparing
Options- A. Reynold number
- B. Froude number
- C. Weber number
- D. Mach number. Discuss
- 7. The best side slope for most economical trapezoidal section, is
Options- A. 30°
- B. 45°
- C. 60°
- D. None of these. Discuss
- 8. In an open tube, free surface of mercury remains
Options- A. horizontal
- B. curved upwards
- C. curved downwards
- D. none of these. Discuss
- 9. Back water curve is caused if
Options- A. friction head loss is more than the bed slope
- B. pressure is due to weir in the channel
- C. there is an increase in width of the channel
- D. none of these. Discuss
- 10. If total head available at the inlet of pipe and f1 is the loss of head due to friction in the pipe, the maximum efficiency of transmission of power (?max) is
Options- A. 1/2
- B. 2/3
- C. 3/4
- D. 4/5 Discuss
Hydraulics problems
Search Results
Correct Answer: parabolic
Correct Answer: Saybolt universal viscometer
Correct Answer: All of these.
Correct Answer: both (a) and (b) above
Correct Answer: 5/2
Correct Answer: Froude number
Correct Answer: 60°
Correct Answer: curved downwards
Correct Answer: pressure is due to weir in the channel
Correct Answer: 2/3
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