MEP & E - Chapter 1 - Thermal, Environmental and Comfort Concepts

Question 1

Heat (Definition)

Answer 1

The agitation or motion of atoms and molecules. Thermal energy in motion.

Question 2

Properties of heat flow

Answer 2

Heat always flows from a substance at a higher temperature to a substance of lower temperature, raising the temperature of the lower temperature substance and lowering the temperature of the higher temperature substance.

Question 3

Quantity of Heat (Symbol and How Measured)

Answer 3

Q

BTU or joules

Question 4

BTU (Defintion)

Answer 4

British thermal unit.
The amount of heat required to raise a pound of water from 59.5 degrees F to 60.5 degrees F at a constant pressure of standard atmospheric pressure.
One Btu is roughly equivalent to one lit wooden match

Question 5

Btu = ? joules

Answer 5

1055 joules (J)

Question 6

Btu = ? watt-hours

Answer 6

0.293 watt-hours (W-hr)

Question 7

Btu = ? calories

Answer 7

252 calories (c)

Question 8

MBtu

Answer 8

one thousand Btu

Question 9

MMBtu

Answer 9

one million Btu

Question 10

Heating Value (Definition)

Answer 10

Calorific value
The quantity of heat produced by its combustion under specific conditions.
It is the energy released as heat when it undergoes complete combustion with oxygen