Fluid Flow and Transport Phenomena MCQs 2026

Bingham plastic exhibits

1. Ayield stress before flowing✓
2. Bzero viscosity always✓
3. CNewtonian behavior always✓
4. Dideal gas law✓

Continuity equation for incompressible flow in pipe is

1. Amass flow varies linearly with time always✓
2. Bvelocity independent of area✓
3. Cvolumetric flow rate constant along pipe if no leak✓
4. Ddensity doubles at each fitting✓

Bernoulli equation with friction includes

1. Aonly chemical reaction term✓
2. Bhead loss term between sections✓
3. Conly radiation loss✓
4. Donly magnetic work✓

Reynolds number Re is

1. Aμ/ρD✓
2. BDv/ρ✓
3. Cρμ/vD✓
4. DρvD/μ✓

Flow is generally turbulent in smooth pipe when Re exceeds about

1. A100✓
2. B4000✓
3. C2300 always exactly for all fluids✓
4. D10✓

Darcy friction factor for fully developed laminar pipe flow is

1. A0.316/Re^0.25✓
2. BRe/64✓
3. C1/Re²✓
4. D64/Re✓

Cavitation in pumps occurs when local pressure drops below

1. Aatmospheric only always✓
2. Bcritical pressure of gas✓
3. Cvapor pressure of liquid✓
4. Doil flash point✓

NPSH available must exceed NPSH required to avoid

1. Acavitation at pump suction✓
2. Bturbine overspeed only✓
3. Ccompressor surge only✓
4. Dreactor thermal runaway✓

Manometer measures

1. Amass flow directly always✓
2. Bpressure difference via liquid column height✓
3. Cchemical composition✓
4. Dheat flux✓

Orifice meter flow measurement relies on

1. Aonly temperature rise✓
2. Bpressure drop across restriction✓
3. Conly radiation✓
4. Donly magnetic field✓