AREA III - Engineering Thermodynamics

Question 1

It deals with heat and work and these properties of substances that bear a relation to heat and work

Answer 1

Thermodynamics

Question 2

its value for an overall system is the sum of its values for the parts into which the system is divided

Answer 2

Extensive property

Question 3

its value is independent of the size or extent of a system and may vary from place to place within the system at any moment

Answer 3

Intensive property

Question 4

It is a measure of the internal energy of a body

Answer 4

Temperature

Question 5

the number of degrees above absolute zero expressed in Kelvins or Rankine.

Answer 5

Absolute temperature

Question 6

It is the normal (perpendicular) force exerted by a fluid per unit area against which the force is exerted.

Answer 6

Pressure

Question 7

It is the measure of pressure above zero.

Answer 7

Absolute pressure

Question 8

It is measured above existing atmospheric pressure.

Answer 8

Gage pressure

Question 9

What is the Standard atmospheric pressure?

Answer 9

101.3 kPa

Question 10

mass per unit volume

Answer 10

mass per unit volume

Question 11

volume per unit mass, reciprocal of density

Answer 11

Specific volume

Question 12

the quantity of energy required to raise the temperature of a unit mass
by 1 K.

Answer 12

Specific Heat

Question 13

States that when two bodies have equality of temperature with a third body, they in turn
have equality of temperature with each other.

Answer 13

Zeroth law

Question 14

also known as the Conservation of Energy principle, states that energy can
neither be created not destroyed, it can only change forms.

Answer 14

First Law of Thermodynamics

Question 15

It deals with the quality of energy (energy degradation).

Answer 15

Second Law of Thermodynamics

Question 16

It states that It is impossible to construct a device that will operate in a
cycle and produce no effect other than the raising of a weight and the exchange of
heat with a single reservoir.

Answer 16

Kelvin-Planck statement

Question 17

It states that It is impossible to construct a device that operates in a cycle and
produces no effect other than the transfer of heat from a cooler body to a hotter body.

Answer 17

Clausius statement

Question 18

states that the entropy of a perfect crystal is zero at the absolute zero of temperature

Answer 18

Third law of Thermodynamics

Question 19

amount of heat added to or subtracted from a substance when unit weight of the material changes 1° in temperature

Answer 19

Coefficient of Thermal Capacity

Question 20

fraction by mass of the vapor in the liquid-vapor mixture.

Answer 20

Quality (x) of a two-phase mixture

Question 21

The amount of heat required to change unit mass of a pure substance from the saturated liquid state to the saturated vapor state, the pressure (or temperature) remaining constant.

Answer 21

Enthalpy (or latent heat) of vaporization

Question 22

the amount of heat required to change unit mass of a pure substance from the solid state to the vapor state, the pressure (or temperature) remaining constant

Answer 22

Enthalpy (or latent heat) of sublimation

Question 23

the amount of heat required to change unit mass of a pure substance from the solid state to the liquid state, the pressure (or temperature) remaining constant.

Answer 23

Enthalpy (or latent heat) of fusion

Question 24

In Boyle’s Law, which variable is constant?

Answer 24

Temperature

Question 25

In Charles’ law, which variable is constant?

Answer 25

Pressure

Question 26

In Gay-Lussac’s Law, which variable is constant?

Answer 26

Volume