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100+ Free BOMI SMT Practice Questions

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Key Facts: BOMI SMT Exam

5

Required SMT Courses

BOMI International

None

Experience to Enroll

BOMI International

0

Separate Capstone Exam Required

BOMI International

200-400 hrs

Typical Study Time

BOMI International

12,000 BTU/hr

One Ton of Refrigeration

Industry standard

140 F

Minimum DHW Storage to Control Legionella

ASHRAE 188 / CDC

100+

Free Practice Questions

OpenExamPrep question bank

The BOMI SMT designation is the entry-level building-systems credential and requires five courses: Refrigeration Systems and Accessories; Air Handling, Water Treatment, and Plumbing Systems; Boilers, Heating Systems, and Applied Mathematics; Electrical Systems and Illumination; and Building Design and Maintenance. No experience is required to enroll. There is no separate Capstone Exam - mastery is demonstrated through five course-level final exams. The SMT is the foundation for the BOMI SMA designation.

Sample BOMI SMT Practice Questions

Try these sample questions to test your BOMI SMT exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1How many BOMI courses are required to earn the Systems Maintenance Technician (SMT) designation?
A.Three
B.Four
C.Five
D.Eight
Explanation: The SMT designation is BOMI's entry-level credential and requires five core courses: Air Handling, Water Treatment, and Plumbing Systems; Boilers, Heating Systems, and Applied Mathematics; Electrical Systems and Illumination; Refrigeration Systems and Accessories; and Building Design and Maintenance.
2What is the entry-level experience requirement for the SMT designation?
A.Five years
B.Three years
C.One year
D.No prior experience is required to enroll
Explanation: The SMT is BOMI's entry-level designation and has no prior experience requirement to enroll. It is suitable for new technicians and career changers. An experience component applies to certain students who enrolled after January 1, 2011, but the program is structured to be accessible.
3How many degrees Fahrenheit must one pound of water be heated to gain one BTU?
A.1 degree
B.10 degrees
C.100 degrees
D.1000 degrees
Explanation: One BTU equals the heat required to raise one pound of water one degree Fahrenheit. This relationship - the specific heat of water being 1.0 BTU per pound-degree F - is fundamental to all U.S. HVAC and steam calculations.
4One ton of refrigeration capacity equals how many BTU per hour?
A.1,000 BTU/hr
B.6,000 BTU/hr
C.12,000 BTU/hr
D.144,000 BTU/hr
Explanation: One ton of refrigeration equals 12,000 BTU/hour. The unit originates from the latent heat required to melt one ton (2,000 lb) of ice in 24 hours (2000 lb x 144 BTU/lb latent / 24 hr = 12,000 BTU/hr). It is the standard capacity unit for U.S. HVAC equipment.
5In a basic vapor-compression refrigeration cycle, where does refrigerant absorb heat from the conditioned space?
A.Compressor
B.Condenser
C.Expansion device
D.Evaporator
Explanation: The evaporator is the heat exchanger where refrigerant absorbs heat from the conditioned air or water, boiling at low pressure into vapor. The compressor then raises the vapor pressure, the condenser rejects heat to the outside, and the expansion device drops the high-pressure liquid back to low-pressure mixture entering the evaporator.
6Refrigerant R-22 (HCFC) is being phased out under what international agreement?
A.Kyoto Protocol
B.Paris Agreement
C.Montreal Protocol
D.Geneva Convention
Explanation: The Montreal Protocol on Substances That Deplete the Ozone Layer (1987) governs the phase-out of CFCs and HCFCs including R-22. R-22 production for new equipment was banned in the U.S. in 2010, and total production was banned in 2020. Service stocks and reclaimed gas remain available.
7An EPA Section 608 Type I technician certification authorizes work on:
A.High-pressure stationary chillers
B.Small appliances (less than 5 lb refrigerant)
C.Low-pressure chillers (R-123)
D.All system types
Explanation: Type I certification is for small appliances with less than 5 pounds of refrigerant charge - household refrigerators, window air conditioners, vending machines. Type II covers high/very-high pressure systems; Type III covers low-pressure; Universal covers all three.
8Which gauge port on a refrigeration manifold connects to the high-pressure side of the system?
A.Blue gauge
B.Red gauge
C.Yellow center hose
D.Black hose
Explanation: On the standard refrigeration manifold gauge set, the red gauge connects to the high-side discharge (condenser/liquid line). The blue gauge connects to the low-side suction. The yellow center hose typically connects to recovery, vacuum pump, or charging cylinder.
9Cooling tower fill primarily increases:
A.Refrigerant inventory
B.Heat transfer surface and air-water contact for evaporative cooling
C.Sound levels
D.Refrigerant temperature
Explanation: Tower fill (also called media) increases the surface area for water-air contact, promoting evaporation and convective heat transfer. Film fills (PVC sheets) are common in clean water; splash fills handle dirtier water. Fill condition strongly affects tower performance.
10Boilers used for space heating in commercial buildings most commonly operate at:
A.High pressure (above 150 psig)
B.Low pressure (15 psig or less)
C.Vacuum only
D.Atmospheric pressure only
Explanation: Commercial space-heating steam boilers typically operate at low pressure - 15 psig or less - which is below the ASME power-boiler threshold of 15 psig. Heating hot water boilers operate as pressure vessels with hot water typically up to 250 F and 160 psig.

About the BOMI SMT Exam

The Systems Maintenance Technician (SMT) is BOMI International's entry-level designation for building engineers and systems maintenance technicians. It establishes the foundation in refrigeration, air handling, plumbing, boilers, electrical systems, and building design and maintenance. No prior experience is required to enroll, making the SMT accessible to career-changers and new technicians, and it leads naturally into the SMA designation.

Assessment

Five course-level final exams covering refrigeration; air handling/water treatment/plumbing; boilers/heating/applied math; electrical/illumination; and building design and maintenance. No separate Capstone Exam.

Time Limit

Per course exam (varies by course)

Passing Score

Passing grade on each of the five course exams

Exam Fee

Course fees vary by member status (BOMI International)

BOMI SMT Exam Content Outline

20%

Refrigeration Systems and Accessories

Vapor-compression cycle (compressor, condenser, expansion device, evaporator), refrigerant types (R-22 phased out, R-410A, R-454B, R-32), EPA Section 608 Type I certification (small appliances <5 lb), Montreal Protocol, manifold gauges (blue/red/yellow), sight glass diagnostics, refrigerant recovery requirements.

20%

Air Handling, Water Treatment, and Plumbing Systems

Chilled water supply temperatures (typically 42-44 F), cooling tower fill (PVC film vs. splash), blowdown and cycles of concentration, ASHRAE 188 Legionella growth zone (68-122 F warm-stagnant), backflow preventers (RPZ, double check, air gap), expansion tanks for thermal expansion, centrifugal pump impellers and volute.

20%

Boilers, Heating Systems, and Applied Mathematics

Firetube boilers (most common mid-size commercial), low-pressure (<=15 psig) vs. medium/high pressure, safety valves and pressure relief, steam traps for condensate removal, feedwater treatment, deaerators and oxygen scavengers, BTU = 1 lb water raised 1 F, 1 ton refrigeration = 12,000 BTU/hr, 2.31 ft water = 1 psi, boiler inspections (typically annual external).

20%

Electrical Systems and Illumination

Ohm's law (V = I x R), three-phase 480/277 V and 208/120 V systems, NEC (NFPA 70) fundamentals, lockout/tagout per 29 CFR 1910.147, GFCI in wet locations, AFCI for fire protection, LED vs. fluorescent vs. incandescent efficacy, lumens vs. footcandles vs. CRI, multimeters and clamp-on ammeters, NFPA 70E qualified-person requirements.

20%

Building Design and Maintenance

Building envelope (roof, walls, windows), structural overview, exterior finishes and life-cycle planning, MERV 8-13 air filter ratings, AHU preventive maintenance (filter changes, belt tension, coil cleaning, condensate drain cleaning), exit signs and egress lighting (NFPA 101 90-minute runtime), sprinkler temperature ratings, ASHRAE Standard 55 comfort (30-60% RH).

How to Pass the BOMI SMT Exam

What You Need to Know

  • Passing score: Passing grade on each of the five course exams
  • Assessment: Five course-level final exams covering refrigeration; air handling/water treatment/plumbing; boilers/heating/applied math; electrical/illumination; and building design and maintenance. No separate Capstone Exam.
  • Time limit: Per course exam (varies by course)
  • Exam fee: Course fees vary by member status

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

BOMI SMT Study Tips from Top Performers

1Memorize the vapor-compression refrigeration cycle and which component does what: evaporator absorbs heat (low pressure); compressor raises pressure; condenser rejects heat (high pressure); expansion device drops pressure back. Most refrigeration questions on the exam map directly to this loop.
2Master the foundational conversions: 1 BTU = 1 lb water raised 1 F; 1 ton refrigeration = 12,000 BTU/hr; 1 psi = 2.31 ft of water head; 1 HP = 0.746 kW. These show up repeatedly in applied math questions.
3Lock in electrical fundamentals: Ohm's law (V = I x R), Power = V x I (single phase), three-phase 480/277 V gives 277 V line-to-neutral, 208/120 V gives 120 V line-to-neutral. Know where GFCI is code-required (wet locations).
4Know your safety standards by name and what they cover: OSHA 29 CFR 1910.147 (LOTO), 1910.146 (confined spaces), 1910.1200 (HazCom 16-section SDS), 1910.1030 (bloodborne pathogens). For fire: NFPA 13 (sprinkler installation), 25 (testing), 70 (NEC), 101 (Life Safety Code), 110 (emergency power).
5Pattern-match Legionella questions: warm stagnant water 68-122 F is the growth zone; store hot water above 140 F at the heater with point-of-use tempering; cooling towers need halogen biocide and ASHRAE 188 water management plan.

Frequently Asked Questions

How many courses are required for the BOMI SMT designation?

Five courses are required: Refrigeration Systems and Accessories; Air Handling, Water Treatment, and Plumbing Systems; Boilers, Heating Systems, and Applied Mathematics; Electrical Systems and Illumination; and Building Design and Maintenance. Each requires a passing course exam.

Do I need any experience to enroll in the SMT?

No prior experience is required to enroll in the SMT, making it BOMI's most accessible designation. An experience component applies to candidates who enrolled after January 1, 2011 per BOMI policy. The SMT is ideal for career changers and new technicians entering the field.

Is there a Capstone Exam for the SMT?

No. Unlike the RPA and FMA designations, the SMT does not have a separate Capstone Exam. The designation is awarded after passing the five course-level final exams. Course exams typically include 75-100 multiple-choice questions.

How does the SMT differ from the SMA?

The SMT is BOMI's entry-level credential (five courses, no experience required). The SMA builds on the SMT with three additional administrator-level courses (Building Design and Maintenance, Environmental Health and Safety Issues, Managing the Organization) and requires three years of stationary engineer or equivalent experience.

How long does it take to earn the BOMI SMT?

Most candidates complete the five SMT courses over 6-18 months while working full-time. Six-week live virtual courses through BOMA chapters compress the pace; online self-paced delivery allows flexibility. Total study time is typically 200-400 hours.

Can I take BOMI SMT courses online?

Yes. BOMI offers online self-paced, collaborative virtual learning (typically six-week classes), accelerated review, and classroom (where available) delivery options. Many BOMA chapters host live virtual SMT cohorts throughout the year.

What jobs do BOMI SMT holders pursue?

SMT holders work as building engineers, stationary engineers, systems maintenance technicians, and HVAC technicians at commercial office buildings, hospitals, universities, and government facilities. The SMT is often paired with EPA Section 608 certification and state-licensed boiler/stationary-engineer credentials.