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67 Cards in this Set
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- Back
- 3rd side (hint)
What is the minimum distance required between a propane tank and a direct fired vaporizer |
10ft |
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How many support blocks are required for a propane tank |
2 |
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What devices are required on piping upstream of a propane vaporizer |
Strainer, excess flow valve, manual SO valve, union |
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What is the minimum rated working pressure of a propane tank |
250psi |
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What is the smallest size of tapping in the bottom of a propane tank for evacuating the tank |
3/4in |
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What device allows propane to flow in both directions but controls the outward flow only |
An excess flow valve |
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What is the minimum distance of a 1500usg propane tank to a property line |
10ft |
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What is the minimum distance for a 1000usg propane tank to a property line |
10ft |
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What is the maximum size of the opening of a spit valve |
Number 54 orifice drill |
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Where is the filler valve located on a propane tank up to 2000uswg |
So the tank is filled into the vapour space |
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What is the minimum distance between a propane tank and a source of ignition |
10ft |
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What is the maximum pressure for a first stage regulator on a permanent residential service |
10psi |
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What type of threaded pipe and fittings are required for liquid propane |
Sched 80 pipe and forged fittings |
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What is required when liquid propane can be trapped between two SO valves |
Hydrostatic relief valve |
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What is the CRN number for Alberta |
2 |
From west to east 1-0 |
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What device must be installed in the outlet of a propane tank that has liquid withdrawal |
Spit valve |
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The maximum fill density of a propane tank is |
80% of the volume of the tank 42% of weight |
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What are the two types of vaporizers |
Direct fired Indirect fired |
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A 40/40 vaporizer will vaporize how many gallons |
40usg at -40F |
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What is the formula to determine the vapourization of a propane tank |
Dia x L x factor Must be in inches |
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The maximum temp that propane should be heated is |
140F |
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Propane vapour piping may be made of |
Steel Copper Polyethylene |
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PE piping is not allowed for the first _____ft downstream of a vaporizer |
10ft |
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Pressure setting of first stage regulator for residential must not exceed |
10psi |
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Minimum bury depth of copper tube is |
15in |
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A manual SO is required upstream or downstream of the second stage regulator |
Upstream |
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Steel pipe with threaded joints must be at least |
Sched 80 and forged fittings |
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If joints are welded, Sched ____ |
Sched 40 |
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The connection to the tank is usually made at |
The bottom of the tank |
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A first stage regulator for residential shall not be set higher than_____psig |
10psig |
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When the regulator is protected, the vent must be at least ____ deg from horizontal |
15 deg |
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The outlet pressure of a second stage regulator is |
11wc |
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The regulator must not be located more than _____ft from where the gas line enters the building |
3ft |
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What valve controls the flow of fuel to the customers appliances |
Service valve |
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Vapour service may be incorporated into a |
Combination valve |
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Filler valves are constructed of |
Two back check valves, one of which has a seat other than metal to metal |
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Propane that leaks out of the filler valve indicates |
Back check valves are leaking |
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Excess flow valve permits the flow of liquid or gas in ____ _______ but controls flow in only one direction |
Both directions |
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The maximum size orifice drill for excess flow valve is |
Number 54 |
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Excess flow valves are used in conjunction with the |
Vapour equalization valve |
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Excess flow valves must be rated so that they will close at |
1.5 times normal flow rate |
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Excess flow valves are tested _____ during ______ |
Annually Winter |
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What valve permits flow in only one direction |
Single back check |
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Back check valves may be used in conjunction with |
Single back check filler valves or positive shut off valves in tank filling connections |
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Vapour equalizing valve are a combination of |
Back check and excess valves |
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The function of the vapour equalizing valve is to |
Equalize pressure between the tank filling it and the tank storing gas |
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The maximum filling density of any propane container for practical application must never exceed |
80% of the water capacity 42% of weight |
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The fixed liquid level (spit valve) has a passageway through the valve restricted to a number____ orifice drill |
Number 54 |
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What is the most convenient gauge to indicate the volume percentage to which a tank is filled |
Float gauge |
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Liquid service valves are located |
At the bottom of a tank |
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The internal safety control valve at the bottom of the tank. It is equipped with a fusible link that melts at |
212F in case of fire |
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What is the minimum size of a liquid evacuation valve |
3/4in |
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A pressure gauge is required on all propane tanks having a water capacity greater than |
2000uswg |
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Electric vaporizer have a capacity of |
80usg |
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Direct fired tank heaters |
Are not to be used Can cause BLEVE |
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A building with a vaporizer installed cannot have a |
Sump pit Drain connected to sewer |
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A direct fired vaporizer shall not be installed closer than |
10ft from any tank or filling point |
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What line may be added for periods where a vaporizer is not required |
Vapour line |
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What is the minimum distance a vaporizer can be installed from a propane tank or fill point |
10ft |
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What is the clearance from a property line or building for a vaporizer |
25ft |
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What is the minimum distance between a pressure relief valve discharge and a building opening below the discharge |
3ft |
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The minimum height above grade for a propane tank pad is |
3in |
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What is the maximum permitted filling capacity when lifting lugs are used |
5% of the water capacity |
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How is a fill valve sized |
Equal to the pipe to which it connects |
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How many tanks may be installed against a wall of a building that are connected together |
4 |
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What is the min and max pressure on a hydrostatic relief valve |
Min 375psi Max 500psi |
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What is the minimum distance from a building for a tank 1000 to 2000 gal |
25ft |
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