Infrared and Electric heaters

Question 1

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

Answer 1

C) Radiant

Question 2

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

Answer 2

D) Glass wool

Question 3

Infrared radiant energy is directed towards:

A) Floors
B) Ceilings
C) Windows
D) Walls
E) Doors

Answer 3

A) Floors

Question 4

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

Answer 4

B) Utilize a fan to blow heated air into the room

Question 5

When used for comfort heating infrared heaters are usually mounted:

A) On walls
B) In floors
C) Over doors
D) Under windows
E) Overhead

Answer 5

E) Overhead

Question 6

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

Answer 6

B) Buried in concrete or pavement

Question 7

Which of the following is the equipment used for direct electric heating systems?

1. Electric boilers
2. Baseboard heaters
3. Wall heaters
4. Unit heaters
5. Warm air furnaces

A) 3, 4, 5
B) 2, 4, 5
C) 1, 3, 5
D) 2, 3, 4
E) 1, 2, 3

Answer 7

D) 2, 3, 4

Question 8

Infrared heaters are used in:

A) Offices
B) Lecture halls
C) Theatre
D) Libraries
E) Skating rinks

Answer 8

E) Skating rinks

Question 9

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

Answer 9

C) The convection or the radiant type

Question 10

Electric heating can be divided into two general groups:

A) Floor and wall
B) Wall and baseboard
C) Radiant panel and infrared
D) Direct and infrared
E) Direct and indirect

Answer 10

E) Direct and indirect

Question 11

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

Answer 11

B) Tubular cased wire