ASHRAE Technical Specifications 3 — Questions and Answers
Question 1: What is the main purpose of the air-side economizer that ASHRAE 90.1 requires in many climate zones?
- Recovering heat from exhaust air in winter
- Dehumidifying outdoor air with desiccants
- Using cool outdoor air for cooling instead of mechanical refrigeration (Correct answer)
- Lowering fan static pressure
Correct answer: Using cool outdoor air for cooling instead of mechanical refrigeration
An air-side economizer brings in more outdoor air when conditions allow, which cuts compressor energy.
Question 2: Which ASHRAE standard covers ventilation of health care facilities, such as operating rooms and isolation rooms?
- Standard 170 (Correct answer)
- Standard 62.2
- Standard 62.1
- Standard 55
Correct answer: Standard 170
ASHRAE/ASHE 170 sets ventilation rates, pressure relationships and filtration for health care spaces.
Question 3: Which ASHRAE document describes the commissioning process from pre-design through occupancy and operation?
- Guideline 36
- Standard 100
- Guideline 0 (Correct answer)
- Standard 111
Correct answer: Guideline 0
ASHRAE Guideline 0 defines the general commissioning process that verifies the Owner's Project Requirements are met.
Question 4: A TAB specification references ASHRAE Standard 111. What does it cover?
- Residential ventilation rates
- Refrigerant safety classification
- Energy use in existing buildings
- Measuring, testing, adjusting and balancing building HVAC systems (Correct answer)
Correct answer: Measuring, testing, adjusting and balancing building HVAC systems
ASHRAE 111 sets procedures and instrumentation for testing, adjusting and balancing HVAC systems.
Question 5: Which ASHRAE standard covers ventilation and acceptable indoor air quality in residential buildings?
- Standard 55
- Standard 90.2
- Standard 62.1
- Standard 62.2 (Correct answer)
Correct answer: Standard 62.2
ASHRAE 62.2 covers dwelling units, while 62.1 covers commercial and institutional buildings.
Question 6: ASHRAE Standard 189.1, developed with ICC, USGBC and IES, covers what topic?
- Thermal comfort conditions
- Laboratory fume hood testing
- Design of high-performance green buildings (Correct answer)
- Data center energy use
Correct answer: Design of high-performance green buildings
Standard 189.1 sets minimum requirements for high-performance green buildings, except low-rise residential, and is used with the International Green Construction Code.
Question 7: Which ASHRAE document gives standardized, high-performance sequences of operation for HVAC systems such as VAV air handlers?
- Standard 135
- Standard 180
- Guideline 0
- Guideline 36 (Correct answer)
Correct answer: Guideline 36
Guideline 36 provides tested, ready-to-specify control sequences that reduce energy use and programming errors.
ASHRAE Technical Specifications 3
What is the main purpose of the air-side economizer that ASHRAE 90.1 requires in many climate zones?