Question: According to Bernoulli’s equation for steady ideal fluid flow_______________?

• 1. principle of conservation of mass holds
• 2. velocity and pressure are inversely proportional
• 3. total energy is constant throughout
• 4. the energy is constant along a stream-line but may vary across streamlines

Question: Mach number is significant in___________________?

• 1. supersonics, as with projectiles and jet propulsion
• 2. full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc.
• 3. simultaneous motion through two fluids where there is a surface of dis-continuity, gravity force, and wave making effects, as with ship’s hulls
• 4. all of fhe above

Question: Pitot tube is used for measurement of__________________?

• 1. pressure
• 2. flow
• 3. velocity
• 4. dsscharge

Question: Normal depth in open channel flow is the depth of flow corresponding to_______________?

• 1. steady flow
• 2. unsteady flow
• 3. laminar flow
• 4. uniform flow

Question: For hypersonic flow, the Mach number is___________________?

• 1. unity
• 2. greater than unity
• 3. greater than 2
• 4. greater than 4

Question: Two dimensional flow occurs when___________________?

• 1. the direction and magnitude of the velocity at all points are identical
• 2. the velocity of successive fluid par-ticles, at any point, is the same at suc-cessive periods of time
• 3. the magnitude and direction of the velocity do not change from point to point in the fluid
• 4. the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane

Question: All the terms of energy in Bernoulli’s equation have dimension of_______________?

• 1. energy
• 2. work
• 3. mass
• 4. length

Question: The fluid forces considered in the Navier Stokes equation are__________________?

• 1. gravity, pressure and viscous
• 2. gravity, pressure and turbulent
• 3. pressure, viscous and turbulent
• 4. gravity, viscous and turbulent

Question: For pipes, laminar flow occurs when Roynolds number is__________________?

• 1. less than 2000
• 2. between 2000 and 4000
• 3. more than 4000
• 4. less than 4000

Question: At the centre line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be_______________?

• 1. minimum
• 2. maximum
• 3. zero
• 4. could be any value