C&G 6189 L3 Practice Questions - City & Guilds 6189 Level 3 NVQ Diploma in Domestic Plumbing & Heating Exam - C&G 6189 L3 Practice Questions - City & Guilds 6189 Level 3 NVQ Diploma in Domestic Plumbing & Heating Exam

Question 1

Under Building Regulations Approved Document G3, which combination of in-line safety devices must protect a packaged unvented hot water storage cylinder against overheating and over-pressure?

A single check valve and a vacuum breaker A pressure reducing valve, an expansion relief valve and a temperature relief valve A double check valve and an anti-gravity loop A motorised valve and a programmable thermostat

Correct Answer:

A pressure reducing valve, an expansion relief valve and a temperature relief valve

Question 2

At approximately what temperature is the temperature relief valve on a G3 unvented hot water cylinder set to operate?

60 degrees C 70 degrees C 90 degrees C 120 degrees C

Correct Answer:

90 degrees C

Question 3

On an unvented hot water installation, where must the tundish be positioned in relation to the temperature relief valve?

At least 2 metres below the valve Within 500 mm of the valve and in a visible position Immediately at the drain connection regardless of distance Inside the cylinder cupboard out of sight

Correct Answer:

Within 500 mm of the valve and in a visible position

Question 4

The discharge pipe D2 (downstream of the tundish) on an unvented system must be laid to which minimum continuous fall?

1 in 10 1 in 40 1 in 200 Level, with no fall required

Correct Answer:

1 in 200

Question 5

Which body of water expansion must the expansion vessel or expansion volume accommodate on a sealed unvented hot water cylinder?

The expansion of the central heating water only Approximately 4% of the stored hot water volume as it is heated The full cylinder volume in case of total drain-down The cold mains supply pressure surge only

Correct Answer:

Approximately 4% of the stored hot water volume as it is heated

Question 1

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About this Exam

Prepare with the C&G 6189 L3 Practice Questions - City & Guilds 6189 Level 3 NVQ Diploma in Domestic Plumbing & Heating Exam practice quiz. This question bank includes 100 questions covering water, heating, unvented, cylinder, and regulations. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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C&G 6189 L3 Practice Questions - City & Guilds 6189 Level 3 NVQ Diploma in Domestic Plumbing & Heating Exam

This practice set contains 100 questions from the matching question bank and focuses on water, heating, unvented, cylinder, and regulations. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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About this Exam

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C&G 6189 L3 Practice Questions - City & Guilds 6189 Level 3 NVQ Diploma in Domestic Plumbing & Heating Exam

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