Free Practice Questions for BEM PCE Part B Mechanical

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Sample BEM PCE Part B Mechanical Practice Questions

Try these sample questions to review concepts for the BEM PCE Part B Mechanical exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1In a typical Malaysian commercial chilled-water HVAC plant, which equipment rejects heat from the condenser water loop to the outdoor air?

A.Cooling tower

B.Air-handling unit (AHU)

C.Fan-coil unit (FCU)

D.Chilled-water buffer tank

Explanation: Water-cooled chillers reject condenser heat into a condenser-water loop that is cooled at the cooling tower by evaporative heat exchange with outdoor air. AHUs and FCUs cool occupied spaces using chilled water; buffer tanks store chilled water, not reject heat.

2What is the primary function of a chilled-water air-handling unit (AHU) in an office building HVAC system?

A.Generate chilled water by vapour-compression refrigeration

B.Condition and distribute supply air using coils, filters and fans

C.Reject condenser heat to the atmosphere

D.Store thermal energy as ice only

Explanation: An AHU draws return or outdoor air, filters it, cools (and often dehumidifies) it across a chilled-water coil, and fans the conditioned air into the duct system. Chillers generate chilled water; cooling towers reject condenser heat.

3Which refrigerant plant component compresses low-pressure refrigerant vapour to a higher pressure and temperature?

A.Evaporator

B.Expansion valve

C.Compressor

D.Cooling coil

Explanation: In a vapour-compression cycle the compressor raises refrigerant vapour pressure and temperature so heat can be rejected in the condenser. The evaporator absorbs heat; the expansion device drops pressure before the evaporator.

4For Malaysian tropical office design, which outdoor-air strategy is most directly intended to control indoor CO2 and odours for occupants?

A.Recirculating 100% return air with no outdoor air

B.Relying only on toilet exhaust for all floors

C.Closing all fresh-air dampers to save energy

D.Providing mechanical outdoor-air ventilation at design rates

Explanation: Outdoor-air ventilation dilutes CO2, odours and contaminants. Codes and good practice require designed fresh-air rates for occupied spaces; zero outdoor air or closed dampers undermine indoor air quality even if cooling capacity remains.

5In a constant-air-volume (CAV) AHU serving a single large zone, how is space temperature typically controlled?

A.By modulating chilled-water or cooling-coil capacity to the zone

B.By varying supply-air duct static pressure only

C.By changing the refrigerant type mid-season

D.By switching the cooling tower fans off permanently

Explanation: CAV systems keep supply airflow roughly constant and control cooling by modulating coil capacity (valve or staging). Variable-air-volume (VAV) instead varies airflow; refrigerant type and permanent tower-fan shutdown are not zone temperature controls.

6What is a principal advantage of a variable-air-volume (VAV) system compared with a simple constant-air-volume system for multi-zone offices?

A.It eliminates the need for any outdoor-air ventilation

B.It can reduce fan energy by reducing airflow when zones need less cooling

C.It removes the need for any chilled-water plant

D.It always operates with 100% outdoor air only

Explanation: VAV terminal units reduce supply airflow to zones with lower cooling demand, which can lower fan power and improve part-load efficiency. Outdoor air and a cooling plant are still required; VAV is not inherently 100% outdoor-air only.

7Which statement best describes a fan-coil unit (FCU) in a chilled-water system?

A.A rooftop cooling tower with fill media

B.A high-voltage switchboard for chiller starters

C.A terminal unit with a fan and coil serving a local space or room

D.A diesel generator for emergency power

Explanation: An FCU is a zone terminal with a small fan blowing room or return air across a chilled-water (and sometimes heating) coil. It is not plant heat-rejection equipment, electrical switchgear, or a generator.

8In a water-cooled chiller plant, what is the typical role of the condenser-water pump?

A.Circulate chilled water from the chiller evaporator to AHUs

B.Supply domestic cold water to washrooms

C.Pressurise the fire hydrant ring main

D.Circulate condenser water between the chiller condenser and cooling tower

Explanation: Condenser-water pumps move warm condenser water to the cooling tower and return cooled water to the chiller condenser. Chilled-water pumps serve the evaporator–AHU loop; domestic and fire pumps are separate systems.

9Why is condensate drain provision important on chilled-water cooling coils in tropical Malaysian buildings?

A.Dehumidification forms condensate that must be drained to prevent overflow and microbial growth

B.Cooling coils never produce condensate in humid climates

C.Condensate is only required for heating coils

D.Drains are only needed on cooling towers, never on AHU coils

Explanation: Cooling coils often operate below dew point in humid climates, so moisture condenses. Proper traps and drains prevent pan overflow, ceiling damage and microbial growth in the drain pan and ductwork.

10MS 1525 is most directly associated with which aspect of Malaysian building services design practice?

A.Fire hydrant pipe colour coding only

B.Energy efficiency and related building energy design guidance

C.Gas meter ownership transfer forms

D.Lift rope replacement intervals only

Explanation: MS 1525 provides Malaysian guidance on energy efficiency in buildings, including HVAC and related systems. Fire colour codes, gas administration and lift rope schedules are covered by other standards and regulations.

About the BEM PCE Part B Mechanical Exam

The BEM Professional Competency Examination (PCE) Part B Mechanical paper tests Professional Engineers who intend to practise as submitting persons (PEPC) in mechanical building services. Official topic weightings for the discipline papers allocate 40% to air-conditioning and ventilation, 30% to fire protection, 20% to hydraulics, and 10% to other mechanical systems (including gas distribution and lifts/escalators listed on the mechanical syllabus).

Exam sponsor: Board of Engineers Malaysia (BEM / Lembaga Jurutera Malaysia). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Open-book Professional Competency Examination Part B (Mechanical). Paper 1: 40 objective questions. Paper 2: 5 long/essay questions, answer any 3. Candidates must pass both papers at one sitting. Overall PCE also requires Part A (common paper); first sitting takes Part A and Part B together.

Time Limit

Paper 1: 1.5 hours. Paper 2: confirm current BEM notice (published sources cite either 1.5 hours or 2 hours for Mechanical Paper 2).

Passing Score

50% for Paper 1 and 50% for Paper 2 at the same sitting.

Exam / Certification Fees

Paid via MyBEM when registering for a PCE sitting. Confirm the current BEM fee schedule in the portal (public third-party summaries exist but amounts change).

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Official sources

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

40%

Air-Conditioning and Ventilation

Chilled-water/DX plants, air distribution, outdoor air, towers, psychrometrics, controls and specialty ventilation.

30%

Fire Protection

UBBL/BOMBA active fire systems, risers, sprinklers, pumps/tanks, detection and firefighter lift provisions.

20%

Hydraulics

Cold/hot water, boosters, tanks, pipe sizing, drainage and backflow protection.

10%

Other Mechanical Systems

Gas distribution, lifts/escalators (DOSH), and miscellaneous mechanical services.

Preparing for the BEM PCE Part B Mechanical Exam

What You Need to Know

Passing score: 50% for Paper 1 and 50% for Paper 2 at the same sitting.
Assessment: Open-book Professional Competency Examination Part B (Mechanical). Paper 1: 40 objective questions. Paper 2: 5 long/essay questions, answer any 3. Candidates must pass both papers at one sitting. Overall PCE also requires Part A (common paper); first sitting takes Part A and Part B together.
Time limit: Paper 1: 1.5 hours. Paper 2: confirm current BEM notice (published sources cite either 1.5 hours or 2 hours for Mechanical Paper 2).
Exam / certification fees: Paid via MyBEM when registering for a PCE sitting. Confirm the current BEM fee schedule in the portal (public third-party summaries exist but amounts change). Official sources

Using Our Practice Resources

Work through all 100 available questions
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BEM PCE Part B Mechanical: Suggested Study Strategy

1Drill UBBL/BOMBA triggers used in practice questions — wet risers around 30.5 m (by-law 231) and firefighter lifts around 18 m (by-law 243) — together with pump/tank and landing-valve layouts.

2For HVAC, practise explaining chiller–AHU–tower loops, outdoor-air/IAQ, and part-load strategies (VAV, VRF, after-hours zoning) as you would in an open-book essay.

3Treat hydraulics as design-and-commissioning: booster redundancy, residual pressure, PRVs, backflow prevention and duty/standby changeover — not just component names.

Frequently Asked Questions

What is BEM PCE Part B Mechanical?

It is the discipline-specific technical component of the Board of Engineers Malaysia Professional Competency Examination for mechanical Professional Engineers seeking a Practising Certificate (PEPC). It tests competency in building mechanical services against BEM rules, statutory codes and professional practice.

What is the format and pass mark?

Paper 1 has 40 objective questions in 1.5 hours with a 50% pass mark. Paper 2 has 5 essay questions of which you answer 3, also with a 50% pass mark. Both papers must be passed at the same sitting. The exam is open book.

What topics are weighted on the Mechanical paper?

Published Part B weightings allocate 40% to air-conditioning and ventilation, 30% to fire protection, 20% to hydraulics, and 10% to other mechanical systems. The mechanical syllabus list also explicitly includes gas distribution and lifts and escalators.

How much does the PCE cost?

Fees are charged by BEM through MyBEM at registration. Older public summaries quoted a first-sitting fee plus processing charge, but you should confirm the live amount in MyBEM because schedules change.