Power Engineering 3A1 ch 11 questions with correct answers graded A+

Power Engineering 3A1 ch 11 questions
with correct answers graded A+

Work done in a cylinder at constant pressure can be defined using the formulas:

1. Work Done (J) = Pressure (kPa) x Area (m²)

2. Work Done (J) = Pressure (kPa) x Area (m²) x Distance (m)

3. Work Done (J) = Force (N) x Area (m²)

4. Work Done (J) = Force (N) x Distance (m) the force moves

Select one:

A. 1, 2

B. 2, 3

C. 3, 4

D. 1, 3

E. 2, 4 - correct answer ✔✔e



The formula Work = (P1V1 - P2V2) / n - 1 is used to describe expansion during:

Select one:

A. An isothermal process

B. An isentropic process

C. A polytropic process

D. An adiabatic process

E. An enthalpy process - correct answer ✔✔c



What mass of air can be held in a storage cylinder at 95°C and 1500 kPa absolute pressure if the tank
volume is 9.5 m³?

Select one:

A. 134.9 kg

B. 144.1 kg

, C. 154.9 kg

D. 522.6 kg

E. 725 kg - correct answer ✔✔a



If 0.25 m³ of a gas at 4000 kPa gauge pressure is expanded until the gauge pressure is 500 kPa and the
expansion is polytropic with n = 1.35. Find the final volume the gas will occupy. Note: Assume
atmospheric pressure = 100 kPa

Select one:

A. 1.04 m³

B. 1.24 m³

C. 1.30 m³

D. 1.33 m³

E. 1.47 m³ - correct answer ✔✔a



If the volume of a confined gas is constant then the absolute pressure is directly proportional to the
absolute temperature according to:

Select one:

A. Boyle's Law

B. Bernoulli's' Law

C. Charles' Law

D. The General Gas Law

E. Gay-Lussac's Law - correct answer ✔✔e



Compression requires that:

Select one:

A. The gas be at absolute pressure and temperature

B. Work be done on the gas

C. Work be done by the gas

D. The gas will be at a constant volume

E. No work is done during the compression process - correct answer ✔✔b