Building Automation Level II ACTUAL
UPDATED QUESTIONS AND CORRECT
ANSWERS
What are the comfort-related properties of indoor air that climate sensors measure? -
CORRECT ANSWERS✅✅I. Circulation
II. Filtration
III. Humidity
IV. Temperature
V. Ventilation
What types of temperature-sensing elements output an electrical signal? - CORRECT
ANSWERS✅✅a.Resistance temperature detectors (RTD)
b.Thermistors
c.Thermocouples
When the ? and the sensor electronics are connected with long conductors, the long
conductors add resistance to a circuit, which affects the voltage measurement and makes the
device susceptible to inaccuracies. - CORRECT ANSWERS✅✅thermistor
What type of device is used to measure the amount of moisture in the air? - CORRECT
ANSWERS✅✅hygrometer
What do most hygrometers measure? - CORRECT ANSWERS✅✅Percentage of relative
humidity (% rh)
? is used to compare the air pressure between two points within a duct, which is used to
monitor fan operation or filter condition. - CORRECT ANSWERS✅✅Differential pressure
Differential pressure switches are often used across a ? and indicate conditions that are
impeding airflow. - CORRECT ANSWERS✅✅fan or filter
,What type of sensor measures the velocity of the air in a duct system? - CORRECT
ANSWERS✅✅An airflow station
What primary methods are used to improve indoor air quality? - CORRECT
ANSWERS✅✅a.Filtration
b.Source control
c.Ventilation
Which of the following devices are not commonly used to control temperature within a
building or building zone? - CORRECT ANSWERS✅✅Humidifiers
A ? is a closed metal container that heats water to produce steam or hot water. - CORRECT
ANSWERS✅✅boiler
The disadvantages of electric heating systems include the high cost of electricity and the
precautions that must be taken to ensure that the heating elements and building are not
damaged due to excessive heat. - CORRECT ANSWERS✅✅True
What are the two main parts of an air conditioner? - CORRECT ANSWERS✅✅II.
Condenser
III. Evaporator
What type of heat pump uses the ground below the frost line as the heat source and heat sink?
- CORRECT ANSWERS✅✅A geothermal heat pump
? are used for humidification in commercial buildings. - CORRECT ANSWERS✅✅a.Drum-
type humidifiers
b.Flow-through metal filters
c.Steam jets
? are the most common type of method used for humidification and simply inject steam into
the air flowing through the supply air duct. - CORRECT ANSWERS✅✅Steam jets
, What are the two main types of fan design? - CORRECT ANSWERS✅✅I. Axial-flow fan
II. Centrifugal fan
What is the most common type of controller used for fan motors in new installations? -
CORRECT ANSWERS✅✅Variable-frequency electric motor drives (VFDs)
What type of switch indicates a fully actuated damper position? - CORRECT
ANSWERS✅✅An end switch
Some dampers are used exclusively by the fire alarm system during a building fire to help
control the spread of fires and smoke or purge smoke outside the building. - CORRECT
ANSWERS✅✅True
How can dampers be used to improve HVAC system control by avoiding temperature
stratification within an air-handling unit? - CORRECT ANSWERS✅✅I. A two-section
outside air damper, with one stage opening before the other, keeps the outside air velocity
fast in order to promote mixing.
II. The outside air and return air damper blades can be arranged so that their air streams
collide, thoroughly mixing the air.
Systems that use either hot or chilled water require pumps and valves to circulate and control
the water through the pipes and heat exchangers. - CORRECT ANSWERS✅✅True
What is the most widely used type of pump in HVAC systems? - CORRECT
ANSWERS✅✅Centrifugal pump
Full-way valves are also called throttling valves. - CORRECT ANSWERS✅✅False
Note: Full-way valves are also called shutoff valves.
What type of valve is designed to control water-flow rate by partially opening or closing? -
CORRECT ANSWERS✅✅A throttling valve
How are valves and dampers commonly controlled? - CORRECT ANSWERS✅✅By
mechanical actuators
UPDATED QUESTIONS AND CORRECT
ANSWERS
What are the comfort-related properties of indoor air that climate sensors measure? -
CORRECT ANSWERS✅✅I. Circulation
II. Filtration
III. Humidity
IV. Temperature
V. Ventilation
What types of temperature-sensing elements output an electrical signal? - CORRECT
ANSWERS✅✅a.Resistance temperature detectors (RTD)
b.Thermistors
c.Thermocouples
When the ? and the sensor electronics are connected with long conductors, the long
conductors add resistance to a circuit, which affects the voltage measurement and makes the
device susceptible to inaccuracies. - CORRECT ANSWERS✅✅thermistor
What type of device is used to measure the amount of moisture in the air? - CORRECT
ANSWERS✅✅hygrometer
What do most hygrometers measure? - CORRECT ANSWERS✅✅Percentage of relative
humidity (% rh)
? is used to compare the air pressure between two points within a duct, which is used to
monitor fan operation or filter condition. - CORRECT ANSWERS✅✅Differential pressure
Differential pressure switches are often used across a ? and indicate conditions that are
impeding airflow. - CORRECT ANSWERS✅✅fan or filter
,What type of sensor measures the velocity of the air in a duct system? - CORRECT
ANSWERS✅✅An airflow station
What primary methods are used to improve indoor air quality? - CORRECT
ANSWERS✅✅a.Filtration
b.Source control
c.Ventilation
Which of the following devices are not commonly used to control temperature within a
building or building zone? - CORRECT ANSWERS✅✅Humidifiers
A ? is a closed metal container that heats water to produce steam or hot water. - CORRECT
ANSWERS✅✅boiler
The disadvantages of electric heating systems include the high cost of electricity and the
precautions that must be taken to ensure that the heating elements and building are not
damaged due to excessive heat. - CORRECT ANSWERS✅✅True
What are the two main parts of an air conditioner? - CORRECT ANSWERS✅✅II.
Condenser
III. Evaporator
What type of heat pump uses the ground below the frost line as the heat source and heat sink?
- CORRECT ANSWERS✅✅A geothermal heat pump
? are used for humidification in commercial buildings. - CORRECT ANSWERS✅✅a.Drum-
type humidifiers
b.Flow-through metal filters
c.Steam jets
? are the most common type of method used for humidification and simply inject steam into
the air flowing through the supply air duct. - CORRECT ANSWERS✅✅Steam jets
, What are the two main types of fan design? - CORRECT ANSWERS✅✅I. Axial-flow fan
II. Centrifugal fan
What is the most common type of controller used for fan motors in new installations? -
CORRECT ANSWERS✅✅Variable-frequency electric motor drives (VFDs)
What type of switch indicates a fully actuated damper position? - CORRECT
ANSWERS✅✅An end switch
Some dampers are used exclusively by the fire alarm system during a building fire to help
control the spread of fires and smoke or purge smoke outside the building. - CORRECT
ANSWERS✅✅True
How can dampers be used to improve HVAC system control by avoiding temperature
stratification within an air-handling unit? - CORRECT ANSWERS✅✅I. A two-section
outside air damper, with one stage opening before the other, keeps the outside air velocity
fast in order to promote mixing.
II. The outside air and return air damper blades can be arranged so that their air streams
collide, thoroughly mixing the air.
Systems that use either hot or chilled water require pumps and valves to circulate and control
the water through the pipes and heat exchangers. - CORRECT ANSWERS✅✅True
What is the most widely used type of pump in HVAC systems? - CORRECT
ANSWERS✅✅Centrifugal pump
Full-way valves are also called throttling valves. - CORRECT ANSWERS✅✅False
Note: Full-way valves are also called shutoff valves.
What type of valve is designed to control water-flow rate by partially opening or closing? -
CORRECT ANSWERS✅✅A throttling valve
How are valves and dampers commonly controlled? - CORRECT ANSWERS✅✅By
mechanical actuators
