C1- Mechanisms of Heat Transfer & Measurement Instruments

Question 1

Conduction is the _______________ of heat energy from one particle to another.

Answer 1

transmission

Question 2

Conduction is more difficult in _______ because atoms are far apart.

Answer 2

gases

Question 3

What is convection?
The movement of particles through a substance to transport ______ from hotter areas to ___________ areas.

Answer 3

heat
cooler

Question 4

What is a convection current?
The ____________ of a fluid transferring ______ from one area to another.

Answer 4

mass motion
heat

Question 5

What is forced convection?
When a fluid is forced to __________ a _____________, so heat is distributed to its surroundings.

Answer 5

flow over
heat source

Question 6

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 _____________.

Answer 6

convection

conduction

Question 7

A thermometer measures:

Answer 7

Temperature.

Question 8

A globe thermometer measures:

Answer 8

Radiant heat.

Question 9

A hygrometer measures:

Answer 9

Humidity.

Question 10

An anemometer measures:

Answer 10

Air velocity.

Question 11

What are electronic control systems?
Systems that study conditions within a building using ________.

Answer 11

sensors

Question 12

True or false: Electronic control systems set the same temperatures for different rooms.

Answer 12

False. They set different temperatures for different rooms.

Question 13

Are electronic systems complex and difficult to operate?

Answer 13

Yes.

Question 14

Electronic control systems react to a wide range of conditions other than temperature such as:
1.
2.
3.

Answer 14

1. Humidity
2. Light levels
3. Movement.

Question 15

What is a thermostat?
A ________ that monitors and responds to temperature changes.

Answer 15

sensor

Question 16

What are thermostats commonly used for?

Answer 16

Domestic central heating systems.

Question 17

Thermostats measure the temperature of air.

And _______________________________ when the desired __________________ is reached.

Answer 17

turns off the heating system
temperature

Question 18

What are remote monitoring systems?
Systems that study and manage conditions of a building __________ using telecommunication.

Answer 18

remotely