6441. Pressure drop in a packed bed for laminar flow is given by the __________ equation.
Kozney-Karman
Blake-Plummer
Leva’s
Fanning friction factor
✅ The correct answer is option A.
Chemical Engineering
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6442. For an incompressible fluid, the bulk modulus of elasticity is
5 kg/m³
∞ N/m²
1 N
0 N/m
✅ The correct answer is option B.
6443. A centrifugal pump is called a turbine pump, if it is having a
Turbine type impeller
Vaned diffusion casing
Rotating vaned volute
None of these
✅ The correct answer is option B.
6444. The Navier-Stokes equation deals with the law of conservation of
Mass
Energy
Both A and B
Momentum
✅ The correct answer is option D.
6445. Self-priming centrifugal pump can be used for
Booster service
Pumping liquid fertilisers (e.g. liquid NH₃)
Pumping industrial wastes
All of the above
✅ The correct answer is option D.
6446. Toothpaste is a
Bingham plastic
Pseudoplastic
Newtonion liquid
Dilatent
✅ The correct answer is option D.
6447. For a fluid rotating at constant angular velocity about vertical axis as a rigid body, the pressure intensity varies as the
Square of the radial distance
Radial distance linearly
Inverse of the radial distance
Elevation along vertical direction
✅ The correct answer is option A.
6448. In turbulent flow, a rough pipe has the same friction factor as a smooth pipe
In the zone of complete turbulence
When the roughness projections are much smaller than the thickness of the laminar film
Everywhere in the transition zone
When the friction factor is independent of the Reynold’s number
✅ The correct answer is option B.
6450. Erosion and pits formation on the impeller of a centrifugal pump may be due to
Cavitation
Low speed of impeller
Its operation with delivery valve closed for considerable time after starting the pump
Off centering of pump with motor
✅ The correct answer is option A.