HVAC System definitions

Question 1

Define heating

Answer 1

The capability to control the room temperature by increasing compared to the outside one

Question 2

Define Ventilation

Answer 2

The capability to recirculate or change air in a room

Question 3

Define air conditioning

Answer 3

The capability to change tempurature by decreasing compared to outside one and the humidity of the air in a room to keep it constant

Question 4

HVAC on small boats

Answer 4

Experience
Feedback
Regulation compliance
Opportunity

Question 5

HVAC up to 24m

Answer 5

Experience
Feedback
Regulation compliance
Opportunity

Question 6

2 types of ventilation

Answer 6

Naturual ventilation
Forced ventilation

Question 7

Natural ventilation types

Answer 7

Louver and clamshell
Cowl
Mushroom vent

Question 8

Natural ventilation downflooding angle

Answer 8

Requirement to show there is significant margin of heel angle before quantities of water can enter
Determined from the lowest point of coaming

Question 9

Forced ventilation

Answer 9

Axial fans
Centrifugal fans

Question 10

Psychometric Chart

Answer 10

Used in engineering for the physical and thermodynamic properties of air/vapour
Used for heating and air conditioning calculations
Check for comfort

Question 11

Parts on a Psychometric chart

Answer 11

Dry bulb air temperature -
Wet bulb air temperature
Relative humidity - % of water vapour in the air
Dew point - temperature at which condensation will begin
Moisture content
Enthalpy (total heat) - heat energy of moisture in BTU/lb
Specific volume