Diagnostics Test 01 in Thermodynamics

Enthalpy of an ideal gas is a function only of _____.

• internal energy
• temperature
• entropy
• pressure

Which of the following is the most efficient thermodynamic cycle?

• Otto
• Diesel
• Brayton
• Carnot

What is the first law of thermodynamics?

• energy can neither be created nor destroyed
• internal energy is due to molecular motions
• heat energy cannot be completely transformed into work
• entropy of the universe is increased by irreversible process

An ideal gas is compressed isothermally. What is the enthalpy change?

• zero
• always negative
• undefined
• always positive

Name the process that has no heat transfer.

• Adiabatic
• Polytropic
• Isobaric
• Isothermal

An ideal gas is compressed in a cylinder so well insulated that there is essentially no heat transfer. The temperature of the gas

• zero
• remain constant
• decreases
• increases

What is the SI unit of pressure?

• dynes/cm²
• kg/cm²
• Psi
• Pascal

The equation Cₚ = Cᵥ + R applies to which of the following?

• two phase states
• all pure substances
• ideal gas
• enthalpy

In the flow process, neglecting kinetic and potential energies, the integral of Vdp represents what?

• shaft work
• flow energy
• heat transfer
• enthalpy change

Mechanical energy of pressure transformed into energy of heat.

• Heat exchanger
• Heat compression
• Enthalpy
• Kinetic energy