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3rd Year Millwright > Insulation > Flashcards

Flashcards in Insulation Deck (15)
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1
Q

Insulation is defined as any material that is?

A

A poor conductor of heat or electricity

2
Q

What method is most cost effective for removing asbestos?

A

Encasement

3
Q

How does heat transfer work in a vacuum?

A

Radiation

4
Q

What is the main purpose of insulation?

A

To conserve energy

5
Q

What decibel rating can permanently damage heating?

A

90 decibels

6
Q

What is the maximum surface temperature allowable for insulated equipment as stared in ASTM code 1055 to ensure personal protection from burns?

A

Below 58 C / 136.4 F

7
Q

Thermal properties of insulation are thermal conductance (C), thermal conductivity (K) and thermal resistance (R)

A

.

8
Q

What are the three main categories of insulation from coldest to hottest?

A
Coldest 
-Cryogenic 
-thermal insulation 
-refractory 
Hottest
9
Q

What is the purpose of cladding?

A

To protect insulation from damage

10
Q

Many good insulators are made up of?

A

Non-Mettalic materials filled with tiny air spaces

11
Q

To prevent condensation, a vapour barrier is installed where on the insulation?

A

On the warm side of the insulation

12
Q

What is “R” value in insulation?

A

Resistance

The ability of material to resist heat flow

13
Q

How are “Gunnite” mixes applied?

A

A spray nozzle

14
Q

What is the best insulation for cryogenic insulation?

A

Cellular glass

15
Q

What insulation is best for extremely high temperatures?

A

Ceramics