
Economizer Controls and Accessories
Authored by Stephen Nicoll
Construction
Vocational training

AI Actions
Add similar questions
Adjust reading levels
Convert to real-world scenario
Translate activity
More...
Content View
Student View
20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the term for the following definition? A type of motor that moves or controls a mechanism or system. The position of the actuator responds to the output signal of the controller, which is constantly comparing the supply air or mixed air temperature to a user-adjustable setpoint.
actuator
sensor
thermostat
compressor
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the term for the following definition? An averaging sensor takes an average temperature across its sensing probe, which has a much more stable temperature reading than the probe type duct sensor.
averaging sensor
point sensor
humidity sensor
pressure sensor
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the term for the following definition? The dual enthalpy control determines the availability for free cooling with the use of an outdoor and a return air enthalpy sensor.
dual enthalpy control
single enthalpy control
static pressure control
variable air volume control
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the term for the following definition? The enthalpy controller is a component that measures if sensible heat and latent heat are low enough to allow for free cooling or economizer cooling. Free cooling is cooling from the outdoor ambient and without the use of a mechanical cooling device.
enthalpy controller
humidistat
thermostatic expansion valve
pressure switch
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the term for the following definition? Floating control uses a fast acting sensor that moves the damper or valve slowly until the controller is satisfied. The actuator maintains that position until the controller senses a need to adjust the position of the valve or dampers.
floating control
proportional control
on-off control
modulating control
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the term for the following definition? Mixing dampers are two sets of dampers: a return air damper (normally open) in the return air plenum and an outdoor air damper (normally closed) in the outdoor air intake duct, which controls the amount of outdoor air entering the AHU. The mixing dampers are positioned by the economizer motor to mix colder outdoor air with warm return air, producing the cool supply air that is supplied to the conditioned space.
mixing dampers
fire dampers
volume control dampers
backdraft dampers
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main objective of this section?
To describe economizer controls and accessories
To install economizer systems
To repair air conditioning units
To design new economizer components
Access all questions and much more by creating a free account
Create resources
Host any resource
Get auto-graded reports

Continue with Google

Continue with Email

Continue with Classlink

Continue with Clever
or continue with

Microsoft
%20(1).png)
Apple
Others
Already have an account?