HVAC 6019 - Infrared and Electric Heating (Chp 9) Flashcards
1
Q
Infrared heaters send out _____ energy in the form of invisible infrared waves that travel in straight lines through the air.
A) Conduction B) Convection C) Radiant D) Geothermal E) Electrical
A
C) Radiant
2
Q
A low temperature catalytic heater contains a layer of ______________ impregnated with a catalyst
A) Plastic fibre B) Wool fibre C) Metal D) Glass wool E) Porous glass
A
D) Glass wool
3
Q
Infrared radiant energy is directed towards:
A) Floors B) Ceilings C) Windows D) Walls E) Doors
A
A) Floors
4
Q
Forced convection type wall heaters: A) Provide coil bypass dampers B) Utilize a fan to blow heated air into the room C) Are equipped with air filters D) Use natural circulation to heat air E) Provide outside air tempering
A
B) Utilize a fan to blow heated air into the room
5
Q
When used for comfort heating infrared heaters are usually mounted: A) On walls B) In floors C) Over doors D) Under windows E) Overhead
A
E) Overhead
Note: infrared heaters
6
Q
Electric snow melter heating elements are generally: A) In blower outlets B) Buried in concrete or pavement C) Along the side of the drive D) Mounted overhead E) Work by induction
A
B) Buried in concrete or pavement
7
Q
Which of the following is the equipment used for direct electric heating systems?
- Electric boilers
- Baseboard heaters
- Wall heaters
- Unit heaters
- Warm air furnaces
A) 3, 4, 5 B) 2, 4, 5 C) 1, 3, 5 D) 2, 3, 4 E) 1, 2, 3
A
D) 2, 3, 4
8
Q
Infrared heaters are used in: A) Offices B) Lecture halls C) Theatre D) Libraries E) Skating rinks
A
E) Skating rinks
9
Q
Wall heaters are: A) Of the radiant type B) Mounted overhead C) The convection or the radiant type D) Considered infrared heaters E) Of the convection type
A
C) The convection or the radiant type
Note:Wall Heaters
10
Q
Which electrical heating element is used in convection type liquid heaters:
A) Open wire B) Tubular cased wire C) Open ribbon D) Closed ribbon E) Closed tubular
A
B) Tubular cased wire
