Fluid Flow and Transport Phenomena MCQs 2026

Bingham plastic exhibits

1. A yield stress before flowing ✓
2. B zero viscosity always ✓
3. C Newtonian behavior always ✓
4. D ideal gas law ✓

Orifice meter flow measurement relies on

1. A only temperature rise ✓
2. B pressure drop across restriction ✓
3. C only radiation ✓
4. D only magnetic field ✓

Manometer measures

1. A mass flow directly always ✓
2. B pressure difference via liquid column height ✓
3. C chemical composition ✓
4. D heat flux ✓

NPSH available must exceed NPSH required to avoid

1. A cavitation at pump suction ✓
2. B turbine overspeed only ✓
3. C compressor surge only ✓
4. D reactor thermal runaway ✓

Cavitation in pumps occurs when local pressure drops below

1. A atmospheric only always ✓
2. B critical pressure of gas ✓
3. C vapor pressure of liquid ✓
4. D oil flash point ✓

Darcy friction factor for fully developed laminar pipe flow is

1. A 0.316/Re^0.25 ✓
2. B Re/64 ✓
3. C 1/Re² ✓
4. D 64/Re ✓

Flow is generally turbulent in smooth pipe when Re exceeds about

1. A 100 ✓
2. B 4000 ✓
3. C 2300 always exactly for all fluids ✓
4. D 10 ✓

Reynolds number Re is

1. A μ/ρD ✓
2. B Dv/ρ ✓
3. C ρμ/vD ✓
4. D ρvD/μ ✓

Bernoulli equation with friction includes

1. A only chemical reaction term ✓
2. B head loss term between sections ✓
3. C only radiation loss ✓
4. D only magnetic work ✓

Continuity equation for incompressible flow in pipe is

1. A mass flow varies linearly with time always ✓
2. B velocity independent of area ✓
3. C volumetric flow rate constant along pipe if no leak ✓
4. D density doubles at each fitting ✓