1. kinetic energy is zero
2. kinetic energy is 1
3. momentum is zero
4. momentum is 1
The correct statements are?
A. (1) and (3)
B. (2) and (3)
C. (1) and (4)
D. (2) and (4)
Correct Answer: (2) and (4) ✔
Last Updated: January 18, 2019
Related MCQs
- When the velocity distribution is uniform over the cross-section, the correction factor for momentum is__________?
- If velocity is zero over l/3rd of a cross-section and is uniform over remaining 2/3rd of the cross-section, then the correction factor for kinetic energy is__________?
- Which of the following velocity potentials satisfies continuity equation ?
- In a forced vortex motion, the velocity of flow is__________?
- Equation of continuity is based on the principle of conservation of__________?
- The pitot tube is used to measure__________?
- The theoretical value of coefficient of contraction of a sharp edged orifice is__________?
- Due to each end contraction, the discharge of rectangular sharp crested weir is reduced by__________?
- The pressure at the summit of a syphon is__________?
- Coefficient of velocity for Borda’s mouth piece running full is__________?
- The major loss of energy in long pipes is due to__________?
- Which of the following has highest coefficient of discharge ?
- The discharge over a broad crested weir is maximum when the depth of flow is__________?
- For a sphere of radius 15 cm moving with a uniform velocity of 2 m/sec through a liquid of specific gravity 0.9 and dynamic viscosity 0.8 poise, the Reynolds number will be__________?
- If x is the distance from leading edge, then the boundary layer thickness in laminar flow varies as__________?
- The depth ‘d’ below the free surface at which the point velocity is equal to the average velocity of flow for a uniform laminar flow with a free surface, will be__________?
- In case of an airfoil, the separation of flow occurs__________?
- The distance y from pipe boundary, at which the point velocity is equal to average velocity for turbulent flow, is__________?
- With the same cross-sectional area and immersed in same turbulent flow, the largest total drag will be on__________?
- For hydro-dynamically smooth boundary, the friction coefficient for turbulent flow is__________?
- For laminar flow in a pipe of circular cross-section, the Darcy’s friction factor f is__________?
- The ratio of average velocity to maximum velocity for steady laminar flow in circular pipes is__________?
- The discharge of a liquid of kinematic viscosity 4 cm2/sec through a 8 cm dia-meter pipe is 3200n cm7sec. The type of flow expected is__________?
- The velocity distribution for laminar flow through a circular tube__________?
- The losses are more in__________?
- The maximum thickness of boundary layer in a pipe of radius r is__________?
- Two pipe systems are said to be equivalent when__________?
- The speed of a pressure wave through a pipe depends upon__________?
- Drag force is a function of__________?
- For laminar flow in circular pipes, the Darcy’s friction factor f is equal to__________?
- The horse power transmitted through a pipe is maximum when the ratio of loss of head due to friction and total head supplied is__________?
- If the elevation of hydraulic grade line at the junction of three pipes is above the elevation of reservoirs B and C and below reservoir A, then the direction of flow will be__________?
- Surge wave in a rectangular channel is an example of__________?
- The correct relationship among displacement thickness d, momentum thickness m and energy thickness e is__________?
- The boundary layer thickness at a distance of l m from the leading edge of a flat plate, kept at zero angle of incidence to the flow direction, is O.l cm. The velocity outside the boundary layer is 25 ml sec. The boundary layer thickness at a distance of 4 m is__________?
- Two pipes of same length and diameters d and 2d respectively are connected in series. The diameter of an equivalent pipe of same length is__________?
- The length of a pipe is 1 km and its diameter is 20 cm. If the diameter of an equivalent pipe is 40 cm, then its length is__________?
- When time of closure tc = L/v0 (where L is length of pipe and v0 is speed of pressure wavE., the portion of pipe length subjected to maximum head is__________?
- A valve is suddenly closed in a water main in wl.ich the velocity is 1 m/sec and velocity of pressure wave is 981 m/ sec. The inertia head at the valve will be__________?
- In series-pipe problems__________?
- If a sphere of diameter 1 cm falls in castor oil of kinematic viscosity 10 stokes, with a terminal velocity of 1.5 cm/sec, the coefficient of drag on the sphere is__________?
- The hydraulic grade line is__________?
- The wake__________?
- A fluid of kinematic viscosity 0.4 cm2/sec flows through a 8 cm diameter pipe. The maximum velocity for laminar flow will be__________?
- The Prartdtl mixing length is__________?
- The distance from pipe boundary, at which the turbulent shear stress is one-third die wall shear stress, is__________?
- Separation of flow occurs when__________?
- The value of friction factor ‘f’ for smooth pipes for Reynolds number 106 is approximately equal to__________?
- In which of the following the friction drag is generally larger than pressure drag?
- When an ideal fluid flows past a sphere__________?
- Stanton diagram is a__________?