ANNA UNIVERSITY Part - A '2' Marks Q &
A
1.
What is ventilation?
The term ventilation is
used to mean the free passage of clean air in a structure. In other words, the
removal of all vitiated air from a building and its replacement with fresh air
is known as ventilation.
2.
What are the factors affecting ventilation?
1. Air changes
2. Humidity
3. Quality of air
4. Temperature
5. Use of building
3.
What are the type of ventilation?
The system of ventilation are classified into the following two types
1. Natural ventilation
2. Mechanical or artificial ventilation
4.
What are the methods of artificial ventilation?
(i) Exhaust system
(ii) Supply system
(iii) Combination of exhaust
and supply systems
(iv)Plenum process
(v) Air-conditioning
5.
What is air conditioning?
It is defined as the process of controlling and maintaining the
properties of air like temperature, humidity, purity, direction of flow etc.,
in a closed space.
6.
What is the principle of air conditioning?
An Air-conditioner continuously draws air from an indoor and
cools it by the refrigeration principles and discharges it back into the same
indoor space.
7.
What are the classification of air conditioning systems?
The air-conditioning
systems can be classified into two categories, as shown
(a) Summer
air-conditioning
(b) Winter
air-conditioning
(c) Year-around
air-conditioning
8.
What is window air-conditioner?
Window air-conditioner is
also known as room air-conditioner
• Is It is designed to condition
the air in a single room or a large scale.
• It is called a window
air-conditioner because it is usually installed in a window.
9.
What are the components of a window air-conditioner?
• The main components of
a window air-conditioner are:
(i) Compressor
(ii) Condenser
(iii) Air filter
(iv) Evaporator
(v) Motor
(vi) Fans
(vii) Thermostat
10.
What are the advantages of the window air-conditioner?
• For each unit, an
individual temperature control device is provided.
• For air distribution, ducts are not
required.
11.
What are the disadvantages of the window air-conditioner
• The unit is installed
outside the wall.
. • This unit has a fixed
air quantity.
12.
What is packaged the air conditioner?
Packaged air conditioner is a self-contained unit primarily for
floor mounting, designed to provide conditioned air to the space to be
conditioned.
13.
What is chilled water plant?
Chilled water is extensively used as a secondary refrigerant in
larger commercial, institutional and industrial premises to make cooling
available over a large area.
14. What is cooling load?
It is defined as the total heat required to be removed from the
space in order to bring it to the desired temperature by air conditioning and
refrigerating equipment.
15. What are the different air
conditioning system?
1. Central Air Conditioning
2. Split Air Conditioner
3. Window Air Conditioner
4. Portable Air Conditioner
5. Hybrid Air Conditioner
16. What are the common causes of AC
fire?
1. Failing to keep cleaned properly
2. Storing flammable materials near the A system
3. Faulty parts and equipment
ANNA
UNIVERSITY Part B (16 Marks) Questions
1.
Discuss principles of natural ventilation, ventilation measurements and design
for natural ventilation.
2.
Describe construction and working of window air conditioner.
3.
Write note on (a) packaged air conditioner (b) chilled water plant.
4.
Write note on (a) Fan coil units (b) Water piping
5.
Discuss different air conditioning systems for buildings.
6.
What are the common causes of AC fires? What are the steps to be taken to
prevent the fires?