The fluid jet discharging from a 2″ diameter orifice has a diameter of 1.75″ at its venacontracta. The co-efficient of contraction is___________________?

A. Fluid flow rate & friction loss
B. Length & friction factor
C. Diameter & friction factor
D. Length & diameter

A. ML-1T-1
B. MLT-1
C. ML-1T
D. MLT

A. Viscous forces to gravity forces
B. Inertial forces to viscous forces
C. Viscous forces to inertial forces
D. Inertial forces to gravity forces

A. That corresponding to static bed
B. That corresponding to completely fluidised bed
C. The porosity of the bed when true fluidisation begins
D. Less than that of the’ static bed

A. Fluid flow control is required
B. Fluid contains dispersed solid particles
C. Valve is required to be either fully open or fully closed
D. One way flow is required

A. Δp/ρ = 4f (L/D) (V2/2gc)
B. Δp = 32 (μLV/gc. D2)
C. Δp/L = 150 [(1 – ε)/ε3]. (μ.V0
2/g2cD)
D. Δp/L = 1.75 [(1 – ε)/ε3]. (ρV0
2/gcDp)