HVAC - Section 1 Fundamental Quiz

1. 1. Ventilation is the process of exchanging or replacing air in any space to provide high indoor air quality which involves temperature control, ____________________ and removal of moisture, odors, smoke, heat, dust, airborne bacteria, carbon dioxide, and other gases.

• (A)  Heater

• (B) Fan

• (C) Air cleaning device

• (D) Oxygen replenishment

2. Temperature reading for air given by a normal or digital thermometer is defined as__________________.

• (A)  Vacuum

• (B) Dry bulb temperature

• (C)  Air humidity

• (D) Wet bulb temperature

3. 3. What are the goals of HVAC SYSTEM?

4. i. Control Temperatures

5. ii. Fresh Air Circulation to keep occupant comfortable

6. iii. Air Filtration to remove contaminants and dust from air

7. iv. Unobtrusive and quiet

• (A) i, ii, iii,

• (B) i, ii, iv

• (C) i, iii, iv

• (D) i, ii, iii, iv

4. What are the words that best describe the word comfort?

i. Fresh air

ii. Not too hot and not too cold  

iii. Too much light and glare

iv. Uneven geometric dimensions

• (A) i, ii,

• (B) iii, iv

• (C) i, ii, iv

• (D) i, ii, iii, iv

5. Enthalpy is a property of a thermodynamic system and is defined as the sum of the system's internal energy and the product of its pressure and volume. True or False?

• (A) True

• (B) False

6. The sum of all sensible & latent heat energy added to or removed from a substance is termed __________________.

• (A) Total Energy

• (B) Total Humidity

• (C) Total Enthalpy

• (D) Total Temperature

1. 7. The factors to determine the Heat load of a building or a room are:

 

i. Occupant

ii. Equipment

iii. Fresh air 

iv. Envelope

v. Duct

vi. Hood

• A. i, ii, iii, v

• B. i, ii, iii, iv

• C. i, iii, iv, v

• D. i, iii, v, vi

8. 8. Heat is a form of energy transferred from one body to another body because of a temperature difference. Heat energy will always flow from a_________________________________________. If no temperature difference exists, there is no heat energy flow.

• A. high temperature body to a body at a lower temperature

• B. low temperature body to a body at a high temperature

9. 9. What is the definition of Sensible Heat?

• A. Sensible heat is the energy required to change the temperature of a substance with phase change.

• B. Sensible heat is the energy required to change the temperature of a substance with no phase change

 

10. 10. All the following are regarding Latent Heat? Except

• A. Latent heat is the amount of energy that is either absorbed or released during a phase transition at a constant temperature.

• B. Defined for a system with phase transition

• C. Describes the energy exchange between air and surroundings

• D. Related to a system with changes in temperature