HKIE Professional Assessment - Gas Discipline Practice Questions - HKIE Professional Assessment - Gas Discipline (Hong Kong Institution of Engineers) Exam - HKIE Professional Assessment - Gas Discipline Practice Questions - HKIE Professional Assessment - Gas Discipline (Hong Kong Institution of Engineers) Exam

Question 1

What is the Wobbe Index (W) of a fuel gas having a gross calorific value (H_v) of 17.2 MJ/m³ and a specific gravity (SG) of 0.55 relative to air?

23.19 MJ/m³ 31.27 MJ/m³ 9.46 MJ/m³ 12.76 MJ/m³

Correct Answer:

23.19 MJ/m³

Question 2

Which chemical component constitutes the largest volumetric percentage in Hong Kong Town Gas manufactured by naphtha steam reforming?

Hydrogen (H2), approximately 49% Methane (CH4), approximately 75% Carbon monoxide (CO), approximately 30% Propane (C3H8), approximately 50%

Correct Answer:

Hydrogen (H2), approximately 49%

Question 3

Why is commercial LPG (Liquefied Petroleum Gas) considered particularly hazardous when leaked in enclosed or low-lying areas in Hong Kong?

LPG has a specific gravity greater than 1.0, causing it to sink and accumulate in drains, basements, and floor levels. LPG is lighter than air and rapidly collects at high ceiling voids creating unvented pockets. LPG spontaneously ignites at ambient Hong Kong temperatures above 25°C without a source of ignition. LPG decomposes into toxic chlorine gas upon exposure to ambient humidity.

Correct Answer:

LPG has a specific gravity greater than 1.0, causing it to sink and accumulate in drains, basements, and floor levels.

Question 4

What are the approximate Lower Flammable Limit (LFL) and Upper Flammable Limit (UFL) of Methane (CH4) in air by volume at standard conditions?

LFL = 5%, UFL = 15% LFL = 2.1%, UFL = 9.5% LFL = 1.8%, UFL = 8.4% LFL = 12.5%, UFL = 74%

Correct Answer:

LFL = 5%, UFL = 15%

Question 5

A gas water heater consumes Town Gas (gross CV = 17.2 MJ/m³) at a rate of 3.6 m³/h. What is the gross heat input rating of the appliance in kW?

17.2 kW 61.9 kW 4.78 kW 22.5 kW

Correct Answer:

17.2 kW

Question 1

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Prepare with the HKIE Professional Assessment - Gas Discipline Practice Questions - HKIE Professional Assessment - Gas Discipline (Hong Kong Institution of Engineers) Exam practice quiz. This question bank includes 100 questions covering hong, kong, safety, commercial, and pressure. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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HKIE Professional Assessment - Gas Discipline Practice Questions - HKIE Professional Assessment - Gas Discipline (Hong Kong Institution of Engineers) Exam

This practice set contains 100 questions from the matching question bank and focuses on hong, kong, safety, commercial, and pressure. 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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HKIE Professional Assessment - Gas Discipline Practice Questions - HKIE Professional Assessment - Gas Discipline (Hong Kong Institution of Engineers) Exam

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