TSSA G3 EXAM PREP QUESTIONS WITH
CORRECT ANSWERS
who |is |authorized |to |work |on |a |liquid |propane |system?
an |LP |fitter
Name |3 |organizations |authorized |to |certify |appliances |in |Ontario.
CSA,CGA,ETL
List |5 |steps |taken |when |rescuing |a |victim |of |electrical |shock.
-Don't |touch |energized |victim
-Free |victim |of |electrical |contact
-Apply |C.P.R |or |artificial |respiration
-Have |someone |call |for |help
-Continue |resuscitation |attempts
In |a |conventional |furnace, |how |is |the |heat |transferred |from |the |heat |exchanger |to |the |return |
air?
Return |air |is |heated |through |conduction |as |air |molecules |touch |the |outside |of |heat |exchanger |
but |the |warm |supply |air |is |heating |up |the |house |by |convection
What |device |is |normally |used |to |check |the |manifold |gas |pressure |of |a |newly |converted |
appliance?
manometer
total |air |supply |volume
1000 |btuh |/ |30 |ft^3 |of |total |air |supply
Excess |Air
Air |supplied |to |the |burner |above |the |theoretical |amount |required |to |burn |the |fuel |to |ensure |
complete |combustion.
pressure |at |sea |level
14.73 |psia
, Methane
CH4
Propane
C3H8
Specific |Gravity |of |propane |vapour
1.52
Specific |Gravity |of |natural |gas |vapour
0.55
Methane
main |component |of |natural |gas
limit |of |flammability |for |propane
2.4-9.5%
limit |of |flammability |for |natural |gas
4-15%
natural |gas |and |propane |max |flame |temp
3600
accepted |calorific |value |natural |gas
1000 |Btuh/ft^3
propane |igntion |temp
920
nat |gas |igntion |temp
1300
Ratio |of |expansion |from |liquid |to |gas |for |natural |gas?
1:600
Ratio |of |expansion |from |liquid |to |gas |for |propane
1:270
CORRECT ANSWERS
who |is |authorized |to |work |on |a |liquid |propane |system?
an |LP |fitter
Name |3 |organizations |authorized |to |certify |appliances |in |Ontario.
CSA,CGA,ETL
List |5 |steps |taken |when |rescuing |a |victim |of |electrical |shock.
-Don't |touch |energized |victim
-Free |victim |of |electrical |contact
-Apply |C.P.R |or |artificial |respiration
-Have |someone |call |for |help
-Continue |resuscitation |attempts
In |a |conventional |furnace, |how |is |the |heat |transferred |from |the |heat |exchanger |to |the |return |
air?
Return |air |is |heated |through |conduction |as |air |molecules |touch |the |outside |of |heat |exchanger |
but |the |warm |supply |air |is |heating |up |the |house |by |convection
What |device |is |normally |used |to |check |the |manifold |gas |pressure |of |a |newly |converted |
appliance?
manometer
total |air |supply |volume
1000 |btuh |/ |30 |ft^3 |of |total |air |supply
Excess |Air
Air |supplied |to |the |burner |above |the |theoretical |amount |required |to |burn |the |fuel |to |ensure |
complete |combustion.
pressure |at |sea |level
14.73 |psia
, Methane
CH4
Propane
C3H8
Specific |Gravity |of |propane |vapour
1.52
Specific |Gravity |of |natural |gas |vapour
0.55
Methane
main |component |of |natural |gas
limit |of |flammability |for |propane
2.4-9.5%
limit |of |flammability |for |natural |gas
4-15%
natural |gas |and |propane |max |flame |temp
3600
accepted |calorific |value |natural |gas
1000 |Btuh/ft^3
propane |igntion |temp
920
nat |gas |igntion |temp
1300
Ratio |of |expansion |from |liquid |to |gas |for |natural |gas?
1:600
Ratio |of |expansion |from |liquid |to |gas |for |propane
1:270
