# The fluid forces considered in the Navier Stokes equation are__________________?

A. gravity, pressure and viscous
B. gravity, pressure and turbulent
C. pressure, viscous and turbulent
D. gravity, viscous and turbulent
E. none of the above…

# For pipes, laminar flow occurs when Roynolds number is__________________?

A. less than 2000
B. between 2000 and 4000
C. more than 4000
D. less than 4000
E. none of the above…

# In a forced vortex, the velocity of flow everywhere within the fluid is__________________?

A. maximum
B. minimum
C. zero
D. non-zero finite
E. unpredictable…

# Buoyant force is___________________?

A. resultant force acting on a floating body
B. equal to the volume of liquid displaced
C. force necessary to keep a body in equilibrium
D. the resultant force on a body due to the fluid surrounding it
E. none of the above…

# A model of a reservior is drained in 4 mts by opening the sluice gate. The model scale is 1: 225. How long should it take to empty the prototype ?

A. 900 minutes
B. 4 minutes
C. 4 x (225)3/2 minutes
D. 4 (225)1/3 minutes
E. 4 x V225 minutes

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

C. laminar flow
D. uniform flow
E. critical flow…

# For hypersonic flow, the Mach number is___________________?

A. unity
B. greater than unity
C. greater than 2
D. greater than 4
E. greater than 10…

A. energy
B. work
C. mass
D. length
E. time…

# Property of a fluid by which molecules of different kinds of fluids are attracted to each other is called________________?

B. cohesion
C. viscosity
D. compressibility
E. surface tension…

# Poise is the unit of________________?

A. surface tension
B. capillarity
C. viscosity
D. shear stress in fluids
E. buoyancy…

# Barometer is used to measure__________________?

A. pressure in pipes, channels etc.
B. atmospheric pressure
C. very low pressure
D. difference of pressure between two points
E. rain level…