Infrared and Electric heaters 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

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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

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3
Q

Infrared radiant energy is directed towards:

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

A) Floors

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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

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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

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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

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7
Q

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
A

D) 2, 3, 4

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8
Q

Infrared heaters are used in:

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

E) Skating rinks

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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

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10
Q

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
A

E) Direct and indirect

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11
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

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