C1- Mechanisms of Heat Transfer & Measurement Instruments Flashcards
Conduction is the _______________ of heat energy from one particle to another.
transmission
Conduction is more difficult in _______ because atoms are far apart.
gases
What is convection?
The movement of particles through a substance to transport ______ from hotter areas to ___________ areas.
heat
cooler
What is a convection current?
The ____________ of a fluid transferring ______ from one area to another.
mass motion
heat
What is forced convection?
When a fluid is forced to __________ a _____________, so heat is distributed to its surroundings.
flow over
heat source
How does underfloor heating work?
It heats the floor of a room, so the room will warm up due to _____________.
The floor becomes a radiator, so it feels warm to touch due to _____________.
convection
conduction
What are electronic control systems?
Systems that study conditions within a building using ________.
sensors
True or false: Electronic control systems set the same temperatures for different rooms.
False. They set different temperatures for different rooms.
Are electronic systems complex and difficult to operate?
Yes.
Electronic control systems react to a wide range of conditions other than temperature such as:
1.
2.
3.
- Humidity
- Light levels
- Movement.
What is a thermostat?
A ________ that monitors and responds to temperature changes.
sensor
What are thermostats commonly used for?
Domestic central heating systems.
Thermostats measure the temperature of air.
And _______________________________ when the desired __________________ is reached.
turns off the heating system
temperature
What are remote monitoring systems?
Systems that study and manage conditions of a building __________ using telecommunication.
remotely
