Unit 22 - Chapter 103 Flashcards
Infrared heaters are usually mounted
Overhead
Infrared radiant energy is directed towards
Floors
Gas fired infrared heaters use the principle of
Heating a solid surface
In an internally fired gas fired infrared heater the surface temperature is
400’C
A low temperature catalytic heater contains a layer of
Glass wool impregnanted with a catalyst
The quartz lamp heating element will respond
In a few seconds
The main disadvantage of electric heating is the
High operating cost
In an open wire type heating element the resistance wire is made of
Nickel chromium
Electrical heating can be divided into two general groups
Direct and indirect
In an electric snow melting unit, a thermostat should be used to automatically shut the system down the when the outdoor temperature is above
2’C
The basic types of heating systems are
- steam
- hot water
- warm air
- electric
The burning flame in a directly fired refractory heater heats the surface temperature to a maximum of
1260’C
Which of the following is not a gas fired infrared heater?
Quartz tube heater
A low temperature catalytic heater contains a layer of
Glass wool impregnanted with a catalyst
An advantage of electric heating is
No fuel storage or handling equipment
