100+ Free HKIE Professional Assessment — Building Services Discipline Practice Questions

Prepare for the HKIE Professional Assessment — Building Services Discipline (Hong Kong Institution of Engineers) exam with instant access — no signup required.

✓ No registration✓ No credit card✓ No hidden fees✓ Start practicing immediately

100+ Questions

100% Free

Loading practice questions...

Same family resources

Explore More HKIE Professional Assessment

Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.

HKIE Professional Assessment — Control, Automation & Instrumentation Discipline (Hong Kong)

Practice Questions100 questions

2026 Statistics

Key Facts: HKIE Professional Assessment — Building Services Discipline Exam

4 Areas

HKIE Competence Standard

HKIE Competence Standards

2 Hours

Written Essay Duration

HKIE PA Guidelines

45 Mins

Interview Duration

HKIE PA Guidelines

The HKIE Professional Assessment in Building Services Discipline assesses 12 core competencies via portfolio submission, interview, and essay. This 100-question English MCQ practice bank serves as an interactive technical knowledge revision tool for HK statutory codes, electrical/HVAC math, and FSD/WSD/EMSD regulations to complement your official assessment preparation.

Sample HKIE Professional Assessment — Building Services Discipline Practice Questions

Try these sample questions to test your HKIE Professional Assessment — Building Services Discipline exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1In psychrometric analysis of an air-conditioning system, how is the Sensible Heat Factor (SHF) defined?

A.The ratio of sensible cooling load to total cooling load (sensible load plus latent load)

B.The ratio of latent cooling load to sensible cooling load

C.The ratio of total cooling load to compressor electrical power input

D.The ratio of room moisture removal rate to total supply air volume

Explanation: Sensible Heat Factor (SHF) is defined as SHF = Q_sensible / (Q_sensible + Q_latent) = Q_sensible / Q_total. It represents the proportion of thermal cooling capacity dedicated to reducing dry-bulb temperature relative to the overall thermal load.

2At constant dry-bulb temperature, what happens to the wet-bulb temperature and relative humidity of air as water vapor is added during a humidification process?

A.Both wet-bulb temperature and relative humidity increase

B.Dry-bulb temperature increases while relative humidity decreases

C.Wet-bulb temperature decreases while relative humidity increases

D.Relative humidity increases while dew-point temperature decreases

Explanation: Adding moisture to air at constant dry-bulb temperature increases the vapor pressure, humidity ratio, and relative humidity. Because the total enthalpy of the air increases due to the latent heat of the added vapor, the wet-bulb temperature also increases.

3According to the Fan Laws, if the rotational speed (RPM) of a centrifugal fan in an AHU is increased by 10%, how does the air volume flow rate change?

A.Increases directly proportional to speed by 10%

B.Increases by the square of speed (21%)

C.Increases by the cube of speed (33.1%)

D.Remains constant while static pressure increases by 10%

Explanation: Fan Law 1 states that air volume flow rate (Q) is directly proportional to fan rotational speed (N), i.e., Q2/Q1 = N2/N1. Therefore, a 10% increase in fan speed yields a 10% increase in volumetric airflow.

4What is the primary operational consequence of specifying higher MERV-rated air filters (e.g., MERV 13 vs MERV 8) in a commercial Air Handling Unit (AHU)?

A.Higher initial and final air pressure drop across the filter, requiring higher fan static pressure

B.Lower air pressure drop across the filter and reduced fan motor power

C.Increased moisture removal capacity during winter heating mode

D.Reduction in indoor acoustic noise levels without affecting fan static pressure

Explanation: Higher MERV-rated filters feature finer media density to trap smaller airborne particles, which inherently creates greater resistance to airflow. This results in a higher initial and final pressure drop across the filter bank, requiring the AHU supply fan to operate against increased static pressure.

5In standard Hong Kong commercial HVAC chilled water system design, what is the typical design temperature differential (ΔT) across the chilled water supply and return headers?

A.5.5 °C to 7.0 °C (e.g., 7 °C supply / 12.5 °C to 14 °C return)

B.1.0 °C to 2.0 °C

C.15.0 °C to 20.0 °C

D.25.0 °C to 30.0 °C

Explanation: Standard HK building design practice uses a chilled water supply temperature of approximately 7 °C with return temperature of 12.5 °C to 14 °C, giving a temperature differential (ΔT) of 5.5 °C to 7.0 °C. High-ΔT designs (e.g., 7 °C to 10 °C ΔT) are increasingly used to reduce pumping power.

6Which line on a standard psychrometric chart represents a pure sensible cooling process without moisture condensation?

A.A horizontal line moving from right to left at constant humidity ratio

B.A vertical line moving downwards at constant dry-bulb temperature

C.A line sloping upwards along constant wet-bulb temperature

D.A curve following 100% relative humidity line

Explanation: Sensible cooling reduces the dry-bulb temperature while keeping the humidity ratio (moisture content) constant. On a standard psychrometric chart, this is represented by a horizontal line moving leftward toward lower dry-bulb temperatures.

7Per ISO 7730 and ASHRAE 55, what PMV (Predicted Mean Vote) range is specified for Class B (standard commercial office) thermal comfort compliance?

A.-0.5 < PMV < +0.5 (with PPD < 10%)

B.-2.0 < PMV < +2.0 (with PPD < 50%)

C.PMV must equal exactly 0.00 at all room locations

D.+1.0 < PMV < +3.0 (with PPD < 5%)

Explanation: Standard commercial building thermal comfort guidelines (ISO 7730 Category B / ASHRAE 55) require PMV to be maintained between -0.5 and +0.5, corresponding to a Predicted Percentage Dissatisfied (PPD) of less than 10%.

8What is the key functional difference between a Variable Air Volume (VAV) system and a Constant Air Volume (CAV) system in air conditioning?

A.VAV varies supply airflow rate at constant supply temperature to match zone loads, whereas CAV maintains constant airflow rate and varies supply temperature

B.VAV varies refrigerant pressure at the chiller while CAV varies fan motor frequency only

C.VAV supplies constant fresh air volume while CAV varies outdoor air percentage dynamically

D.VAV eliminates air filtration while CAV uses high-efficiency MERV filters

Explanation: VAV systems modulate the supply air volume delivered to individual thermal zones using damper-controlled terminal boxes while keeping supply air temperature relatively constant. CAV systems deliver a constant volumetric airflow rate and vary supply air temperature to maintain room comfort.

9An AHU supplies air at a volumetric flow rate of 2.5 m³/s to an open-plan office. The room design dry-bulb temperature is 24 °C and the supply air dry-bulb temperature is 14 °C. Assuming air density ρ = 1.2 kg/m³ and specific heat capacity cp = 1.005 kJ/kg·K, calculate the sensible cooling capacity delivered by the AHU.

A.30.15 kW

B.25.10 kW

C.35.40 kW

D.12.06 kW

Explanation: Sensible cooling capacity Q_s = ρ × Q × cp × ΔT. Here, ρ = 1.2 kg/m³, Q = 2.5 m³/s, cp = 1.005 kJ/kg·K, and ΔT = (24 - 14) = 10 K. Therefore, Q_s = 1.2 × 2.5 × 1.005 × 10 = 30.15 kW.

10An air-conditioning coil removes moisture from a primary outdoor air stream at a mass flow rate of 3.0 kg/s. The humidity ratio decreases from w1 = 0.020 kg_w/kg_da to w2 = 0.016 kg_w/kg_da. Taking the latent heat of vaporization h_fg = 2450 kJ/kg, what is the latent cooling load across the coil?

A.29.40 kW

B.14.70 kW

C.44.10 kW

D.58.80 kW

Explanation: Latent cooling load Q_l = mass flow rate × h_fg × Δw. Δw = 0.020 - 0.016 = 0.004 kg_w/kg_da. Mass flow rate = 3.0 kg/s. Thus, Q_l = 3.0 kg/s × 2450 kJ/kg × 0.004 = 29.40 kW.

About the HKIE Professional Assessment — Building Services Discipline Exam

The HKIE Professional Assessment for the Building Services Discipline evaluates candidate competence for Corporate Membership (MHKIE) and qualification as a Registered Professional Engineer (R.P.E.) in Hong Kong. This question bank provides an English-language MCQ study adaptation for HVAC air-conditioning & psychrometrics, low-voltage electrical installations (EMSD CoP), fire service installations (FSD CoP), plumbing & drainage (WSD Waterworks Regulations), vertical transportation (Lifts Ordinance Cap. 618), Building Energy Efficiency Ordinance (Cap. 610, BEEO/BEC), energy auditing, and HKIE ethics. Note: This practice bank is an educational study adaptation intended for technical knowledge revision and self-assessment; it does not replace the official HKIE portfolio submission, interview presentation, or 2-hour technical essay examination.

Assessment

Competence evidence portfolio assessment, 45-minute presentation & interview, and 2-hour technical essay examination.

Time Limit

2 hours (written/technical essay) plus interview

Passing Score

Competence-based assessment against the HKIE Competence Standard for Professional Engineers

Exam Fee

HK$ 3,100 (HK$ 640 application fee + HK$ 2,460 assessment fee) (The Hong Kong Institution of Engineers (HKIE))

HKIE Professional Assessment — Building Services Discipline Exam Content Outline

25%

HVAC Air-Conditioning & Psychrometrics

Psychrometrics, sensible and latent heat loads, coil selection, chiller plant efficiency, hydraulic balancing, and AHU fan static pressure.

20%

Electrical Low Voltage Distribution & EMSD CoP

EMSD Code of Practice for Electricity Wiring Work, maximum demand, 3-phase load calculation, voltage drop, earth fault loop impedance, and RCD protection.

15%

Fire Service Installations & FSD CoP

FSD CoP for Minimum Fire Service Installations, sprinkler hazard groups, fire pump performance curves, hose reel water storage, and smoke control systems.

15%

Plumbing, Drainage & WSD Regulations

WSD Waterworks Regulations & Technical Requirements, pipe sizing, Hazen-Williams friction loss, backflow prevention RPZ valves, and soil/waste trap seals.

10%

Vertical Transportation & Lifts Ordinance (Cap. 618)

Lifts and Escalators Ordinance (Cap. 618), elevator traffic analysis (RTT, handling capacity %), safety gear operation, governor tripping speed, and drive motors.

10%

Building Energy Code (BEC / BEEO Cap. 610) & Energy Audits

BEEO Cap. 610 statutory requirements, BEC maximum allowable lighting power density (LPD), chiller minimum COP, VFD requirements, and EAC energy audit cycles.

HKIE Code of Ethics, Professional Practice & Site Safety

HKIE Rules of Conduct, professional integrity, public safety priority, environmental sustainability, CPD obligations (45 hrs/yr), and site safety regulations.

How to Pass the HKIE Professional Assessment — Building Services Discipline Exam

What You Need to Know

Passing score: Competence-based assessment against the HKIE Competence Standard for Professional Engineers
Assessment: Competence evidence portfolio assessment, 45-minute presentation & interview, and 2-hour technical essay examination.
Time limit: 2 hours (written/technical essay) plus interview
Exam fee: HK$ 3,100 (HK$ 640 application fee + HK$ 2,460 assessment fee)

Keys to Passing

Work through all 100 available questions
Review every answer and explanation
Track weak areas and revisit them
Use our AI tutor for tough concepts

HKIE Professional Assessment — Building Services Discipline Study Tips from Top Performers

1Master quantitative calculations for cooling load SHF, 3-phase electrical voltage drop, loop impedance Zs, Hazen-Williams head loss, and lift RTT.

2Thoroughly study Hong Kong statutory codes: EMSD Wiring CoP, FSD FSI CoP, WSD Waterworks Regulations, Lifts Ordinance Cap. 618, and BEEO Cap. 610.

3Review the 12 HKIE Core Engineering Competencies (competence standard for Corporate Membership) and align your project experience with each competency.

4Practice technical essay writing under timed 2-hour conditions, focusing on engineering problem identification, alternative evaluations, statutory compliance, and safety.

Frequently Asked Questions

What is the structure of the HKIE Professional Assessment?

The HKIE Professional Assessment consists of three components: (1) review of candidate's Report on Training & Experience and CPD records, (2) a 45-minute oral interview (including a 15-minute presentation), and (3) a 2-hour technical essay examination on an assigned engineering topic.

Does this MCQ practice bank replace the HKIE Professional Assessment exam?

No. The official HKIE Professional Assessment uses competence portfolio review, interview, and essay writing. This 100-question English MCQ bank is an independent study adaptation designed to test and reinforce technical engineering knowledge and HK statutory code compliance.

What Hong Kong codes of practice are covered in this question bank?

The bank covers the EMSD Code of Practice for Electricity (Wiring) Work, FSD Code of Practice for Minimum Fire Service Installations, WSD Waterworks Regulations & WTR, EMSD Building Energy Code (BEC 2021/2024 edition under Cap. 610), Lifts and Escalators Ordinance (Cap. 618), and HKIE Rules of Conduct.

What are the eligibility requirements for HKIE Professional Assessment?

Candidates must hold an accredited engineering degree (BEng in Building Services/Mechanical/Electrical/Energy) and have completed HKIE Scheme A training (2-3 years) plus post-training experience, or have at least 5-6 years of relevant engineering experience via the General Route.