Bernoulli’s Principle NEET Questions

Physics - Properties of Solids and Liquids

Bernoulli’s Principle MCQ Questions


7.
In the derivation of Bernoulli's equation, the work-energy theorem gives (P₁ − P₂)ΔV = ΔKE + ΔPE. After dividing by ΔV, the equation obtained is:
A.
P₁ + P₂ = ½ρ(v₁² + v₂²)
B.
P₁ − P₂ = ½ρ(v₁² − v₂²)
C.
P₁ − P₂ = ½ρ(v₂² − v₁²) + ρg(h₂ − h₁)
D.
P₁ − P₂ = ρg(h₁ − h₂)
😑 View Answer Rough Work Error
ANSWER :
C. P₁ − P₂ = ½ρ(v₂² − v₁²) + ρg(h₂ − h₁)
8.
When a fluid is at rest (v = 0 everywhere), Bernoulli's equation reduces to:
A.
P₁ + ρgh₁ = P₂ + ρgh₂
B.
P₁ − P₂ = ½ρv²
C.
P₁ = ρgh₁
D.
P₁ = P₂
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ANSWER :
A. P₁ + ρgh₁ = P₂ + ρgh₂
9.
Bernoulli's equation is valid for which type of fluid flow?
A.
Any flow at any speed
B.
Non-viscous, incompressible, steady (streamline) flow
C.
Only for gases, not liquids
D.
Viscous, compressible, turbulent flow
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ANSWER :
B. Non-viscous, incompressible, steady (streamline) flow
10.
Bernoulli's equation does NOT hold for turbulent flow because:
A.
In turbulent flow, velocity and pressure are constantly fluctuating in time — the steady flow condition is violated
B.
Turbulent fluids have zero viscosity
C.
Turbulent flow is only found in gases
D.
Turbulent flow is too fast
😑 View Answer Rough Work Error
ANSWER :
A. In turbulent flow, velocity and pressure are constantly fluctuating in time — the steady flow condition is violated
11.
Viscosity is like internal friction in a fluid. Its effect on Bernoulli's equation is:
A.
Viscosity increases pressure along the flow
B.
Viscous drag dissipates kinetic energy as heat, so the pressure P₂ will be lower than predicted by Bernoulli's equation
C.
Viscosity increases velocity along the flow
D.
It has no effect
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ANSWER :
B. Viscous drag dissipates kinetic energy as heat, so the pressure P₂ will be lower than predicted by Bernoulli's equation
12.
Bernoulli's equation requires the fluid to be incompressible. This restriction means:
A.
Only very dense fluids can be used
B.
The fluid must be a solid
C.
The density ρ remains constant throughout the flow — elastic energy of compression is not considered
D.
The fluid cannot have any pressure
😑 View Answer Rough Work Error
ANSWER :
C. The density ρ remains constant throughout the flow — elastic energy of compression is not considered