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2024 Gas > Section 5 Code Book > Flashcards

Section 5 Code Book Flashcards

1
Q

What is the maximum distance a line pressure regulator can be located from the propane supply entry in a dwelling?

A

3 ft (1 m)

This applies to one- or two-family dwellings or row housing.

5.1.7

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2
Q

What must the gas supplied to an appliance meet according to its rating plate?

A

Normal operating pressure within the specified range

This requirement applies at maximum and minimum load demand on the gas piping system.

5.2.1.1

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3
Q

What is required if the normal operating pressure cannot be met by the existing system?

A

One or more pressure regulators and overpressure protection devices

This ensures compliance with the specified pressure requirements.

5.2.1.1
5.2.1.2

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4
Q

What are the four requirements for every pressure regulator?

A
  • Suitable for the gas
  • Sufficient size for required gas flow
  • Factory set or field-adjusted for outlet pressure
  • Capable of supplying required gas pressure

These requirements ensure proper functionality and safety.

5.2.1.3

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5
Q

What must be maintained between a pressure regulator and the moisture-exhaust duct?

A

Minimum clearance specified in Clauses 7.4.4 and 7.5.2

This is to prevent any potential hazards.

5.2.1.4

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6
Q

True or False: A pressure regulator can be bypassed.

A

False

Bypassing a pressure regulator is not permitted.

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7
Q

What type of pressure regulator is required?

A

Lock-up (positive shut-off) type

This ensures safety by preventing gas flow when not in operation.

5.2.1.7

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8
Q

What must be installed upstream of the pressure regulator?

A

A manual shut-off valve

This is necessary for safety and maintenance purposes.

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9
Q

Fill in the blank: Gas shall be supplied to an appliance, equipment, or accessory at a normal operating pressure that is within the pressure range specified on the _______.

A

appliance’s, equipment’s, or accessory’s rating plate

This ensures that the equipment operates safely and effectively.

5.2.1.1

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10
Q

What is CSA B149.1:20?

A

Natural gas and propane installation code

This code provides guidelines for the safe installation of gas systems.

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11
Q

What does Clause 5.3 pertain to?

A

Overpressure protection device requirements

Refer to Annex K regarding certified line pressure regulators and overpressure protection devices.

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12
Q

Where should a pressure regulator vent be terminated?

A

Outdoors, except as permitted by Clause 5.5.4

The term ‘vent’ refers to either an internal relief valve vent or a breather vent on the regulator casing.

5.2.1.8

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13
Q

Where should a pressure regulator not be installed?

A

Inaccessible locations, concealed locations, or where subject to damage

This is detailed in Clause 5.2.1.9.

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14
Q

What delivery pressure thresholds apply to Clause 5.2.2?

A

2 psig (14 kPa) or less

This clause outlines specific requirements for natural gas and propane installations.

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15
Q

What is required when the delivery pressure exceeds maximum rated pressure of appliances?

A

A line pressure regulator must be installed upstream of the appliance

The regulator must be certified to ANSI Z21.80/CSA 6.22 or UL 144.

5.2.3.3

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16
Q

What is the minimum number of stages required for propane installations?

A

Not less than two-stage regulation

This applies to all permanent propane installations as per Clause 5.2.2.3.

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17
Q

How should a pressure regulator be positioned outdoors or in unheated areas?

A

Bonnet vent opening discharges vertically downward

Specific exceptions apply, such as when installed within a container dome.

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18
Q

What is the capacity limit for a single-stage pressure regulator to be installed horizontally?

A

Not exceeding 150,000 Btu/h (45 kW)

It must be protected from inclement weather.

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19
Q

What type of system can be exempt from Clause 5.2.1.7 b)?

A

A system operating at 2 psig (14 kPa) or less with a leak limiting system

The orifice must be for 1 ft/h (0.0283 m3/h) of gas with a specific gravity of 1.53.

20
Q

True or False: A pressure regulator with vent limiting means can be installed in a non-ventilated space.

A

False

It must be installed in a ventilated space.

21
Q

What is the purpose of a pressure regulator in natural gas and propane installations?

A

To control and maintain safe operating pressures in the gas piping system

Ensures that appliances and equipment receive the correct pressure for safe operation.

22
Q

What must be ensured about the installation of a pressure regulator on a vehicle?

A

It must not be impeded by weather conditions and should be protected by a substantial hood

The hood can be made of metal or plastic and should be of an enclosed style.

23
Q

What additional requirements apply when delivery pressures exceed 2 psig (14 kPa)?

A

One or more pressure regulators must be installed in the gas piping system

This is to ensure proper regulation of pressure when it exceeds the maximum rated pressure of downstream components.

24
Q

When should a high pressure regulator be used?

A

When the operating pressure exceeds 2 psi

High pressure regulators are specifically designed to handle higher pressures safely.

25
Q

What type of pressure regulator is required when the maximum rated pressure is 2 psig (14 kPa) or less?

A

A line pressure regulator certified to ANSI 221.80/CSA 6.22 or UL 144

Certification ensures that the regulator meets safety and performance standards.

26
Q

What are the construction requirements for a high pressure regulator operating with outlet pressures greater than 2 psig?

A

It must be suitable for the gas being conveyed, provide required gas flows and pressures, and be installed per manufacturer’s instructions

Additionally, it should not exceed 150% of the normal outlet operating pressure under no flow conditions.

27
Q

What must be provided when a pressure regulator is installed downstream of another pressure regulator?

A

An overpressure protection device

This protects the downstream regulator from inlet pressure exceeding its rated pressure due to upstream regulator failure.

28
Q

Fill in the blank: A pressure regulator must be protected by a substantial _______ of enclosed style.

A

[metal or plastic hood]

29
Q

True or False: A pressure regulator does not need to be protected from weather conditions if it is installed on a vehicle.

A

False

The installation must ensure that the regulator’s operation is not impeded by weather.

30
Q

List two requirements for a high pressure regulator.

A
  • Suitable construction for the gas being conveyed
  • Suitable capacity to provide required gas flows and pressures
31
Q

What is the exemption condition for a line pressure regulator operating at an inlet pressure of 2 psig or less?

A

Equipped with a leak limiting system orificed for 2.5 ft3/h of gas with specific gravity of 0.6

This applies to the requirements of Clause 5.2.1.7 b)

32
Q

What must a pressure regulator have to be exempt from Clause 5.2.1.7 b) for inlet pressures above 2 psig?

A

Limit the escape of gas from vent openings to less than 2.5 ft3/h, overpressure protection device, certified to ANSI Z21.80/CSA 6.22

The overpressure protection device must be set below 2 psig or 2 times the delivery pressure.

33
Q

How should a pressure regulator be positioned if installed outdoors or in an unheated area?

A

Bonnet vent opening discharges vertically downward

Exceptions include installation within a container dome and single-stage pressure regulators of certain capacities.

34
Q

What is the requirement for a pressure regulator mounted on a vehicle?

A

Safe operation not impeded by weather, protected by a substantial hood

The hood can be made of metal or plastic.

35
Q

What is required when provision is made for mounting a cylinder on the A-frame of a vehicle?

A

Rigidly mounted support bracket for the pressure regulator

The pressure regulator must be protected in accordance with Clause 5.2.4.4.

36
Q

What is the general requirement for line pressure regulators regarding overpressure protection devices?

A

Must be provided with an overpressure protection device

This is except as permitted in Clause 5.3.2.

37
Q

What type of line pressure regulators are supplied with factory-installed overpressure protection devices?

A

Class I line pressure regulators certified to ANSI Z21.80/CSA 6.22

These regulators are rated for inlet pressures of either 5 psig or 10 psig.

38
Q

Under what condition is an overpressure protection device not required for line pressure regulators?

A

If certified to ANSI Z21.80/CSA 6.22 and inlet pressure is 2 psig or less

This is specified in Clause 5.3.2.

39
Q

Fill in the blank: A pressure regulator must limit the escape of gas to less than _______ for exemption from Clause 5.2.1.7 b).

A

2.5 ft3/h

40
Q

True or False: A single-stage pressure regulator of a capacity not exceeding 150,000 Btu/h may be installed in a horizontal position.

A

True

It must be protected from inclement weather.

41
Q

What is the normal operating pressure requirement for gas supplied to an appliance?

A

It must be within the pressure range specified on the appliance’s rating plate or as indicated by the manufacturer’s instructions.

This applies at maximum and minimum load demand on the gas piping system.

42
Q

What must be installed if required to meet the normal operating pressure?

A

One or more pressure regulators and any required overpressure protection devices.

This is in accordance with Clause 5.2.1.1.

43
Q

What are the requirements for every pressure regulator?

A
  • Suitable for the gas
  • Sufficient size to provide required flow
  • Factory set or field-adjusted for outlet pressure
  • Capable of supplying gas pressure as required

These requirements ensure safe and effective operation.

44
Q

What is the minimum clearance requirement for a pressure regulator?

A

It must maintain the minimum clearance specified in Clauses 7.4.4 and 7.5.2 from the moisture-exhaust duct.

This is important for safety and operational efficiency.

45
Q

True or False: A pressure regulator can be bypassed.

A

False.

Bypassing a pressure regulator is not allowed as it can compromise safety.

46
Q

What type of pressure regulator is required?

A

A lock-up (positive shut-off) type.

This type ensures that the gas flow is completely shut off when required.

47
Q

What must be installed upstream of the pressure regulator?

A

A manual shut-off valve.

This is a safety measure to control gas flow.

2024 Gas (3 decks)

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