Fundamentals of Engineering Fluid Mechanics and Thermodynamics 2

Question 1

For an ideal gas, which equation relates pressure, volume, temperature, and number of moles?

Accepted Answer

PV = nRT

Answer

PV = nT/R

Answer

P = nRT/V²

Answer

PV² = nRT

Question 2

What is the Carnot efficiency of a heat engine operating between temperatures T_H = 800 K and T_C = 400 K?

Accepted Answer

50%

Answer

25%

Answer

75%

Answer

100%

Question 3

Which fluid property describes resistance to shear deformation (resistance to flow)?

Accepted Answer

Dynamic viscosity

Answer

Density

Answer

Surface tension

Answer

Compressibility

Question 4

What is head loss due to friction in a pipe best described by?

Accepted Answer

Darcy-Weisbach equation

Answer

Bernoulli's equation

Answer

Continuity equation

Answer

Manning's equation

Question 5

What happens to the entropy of a system during a reversible adiabatic process?

Accepted Answer

It remains constant

Answer

It increases

Answer

It decreases

Answer

It fluctuates

Question 6

Buoyancy force on a submerged object equals:

Accepted Answer

The weight of fluid displaced by the object

Answer

The weight of the object itself

Answer

The pressure at the object's centroid times its volume

Answer

The product of object density and gravity