MEP Exam 2 QUESTIONS AND ANSWERS 100%ACCURATE.
What is a central HVAC system? - ✅✅Conditioned air is generated from one source
What is the most common type of central hvac systems? - ✅✅Split system (like your house)
What are benefits of using a central hvac system? - ✅✅- efficient large equipment
- concentrated maintenance
- less noise
- allows lower installed capacity
- can use thermal storage
What is a distributed hvac system? - ✅✅multiple sources of conditioned air that allow for
easy zoning (RTU)
What is an AHU? - ✅✅An air handler, or air handling unit (often abbreviated to AHU), is a
device used to regulate and circulate air as part of a heating, ventilating, and air-conditioning
(HVAC) system.
What is a constant air volume system? - ✅✅In a simple CAV system, the supply air flow rate
is constant, but the supply air temperature is varied to meet the thermal loads of a space. Most
CAV systems are small, and serve a single thermal zone.
What is a variable air volume system? - ✅✅Unlike constant air volume (CAV) systems,
which supply a constant airflow at a variable temperature, VAV systems vary the airflow
at a constant temperature.
What is a dual duct system? - ✅✅An air-conditioning system in which two supply
ducts run to each space being conditioned, one for cold air, the other for warm air; at
each individually controlled space, air from the two ducts is blended in a sheet-metal
box (called a mixing box) and then supplied to the conditioned space.
What is a multi zone system? - ✅✅Hot and cold air is mixed at the air handling unit
What is the hertz frequency in the USA? - ✅✅60 hertz
Most chill water systems are piped in which direction? - ✅✅Parallel
Control valves regulate flow through? - ✅✅the fan coils
What are the primary hvac equipment and systems? - ✅✅- the primary sources of
heating and cooling
- chillers and heat rejection
, - boiler
- engines and generators
- thermal storage
What are the secondary hvac equipment and systems? - ✅✅- generally located
inside of the building
- Air distribution
- Water distribution
- Air handlers and fan coils
What is an air distribution device? - ✅✅diffuser
diffuser throw air in what direction? - ✅✅horizontally
What are the noise criteria for a diffuser? - ✅✅- auditoriums 20-25
- restaurants 25-30
What velocity should air be distributed at in occupied zones? - ✅✅less than 50 fpm
What is a house keeping pad? - ✅✅4" thick pad air handling units are placed on
What is a plug fan? - ✅✅- fan that moves air inside an air handling unit
- cheap
What is a building management system? - ✅✅A computer-based control system
installed in buildings that controls and monitors the building's mechanical and electrical
equipment such as ventilation, lighting, power systems, fire systems, and security
systems.
What are the monitoring points for a BMS? - ✅✅humidity, temperature, and CO2
What is a panel filter? - ✅✅standard house filter
What is a bag filter? - ✅✅filter made of a cloth bag ordinarily about 30 feet long for
recovery of metal oxides and other solid particles suspended in a gas (as from smelting
or other furnaces)
Does a filter get better or worse as it becomes dirtier? - ✅✅Better
What is a frost stat used for? - ✅✅telling the heating coil to turn on
What are other words for an inverter? - ✅✅Variable Speed Drive & Variable Volume
Drive & Variable Velocity Drive & Variable Frequency Drive
What is a central HVAC system? - ✅✅Conditioned air is generated from one source
What is the most common type of central hvac systems? - ✅✅Split system (like your house)
What are benefits of using a central hvac system? - ✅✅- efficient large equipment
- concentrated maintenance
- less noise
- allows lower installed capacity
- can use thermal storage
What is a distributed hvac system? - ✅✅multiple sources of conditioned air that allow for
easy zoning (RTU)
What is an AHU? - ✅✅An air handler, or air handling unit (often abbreviated to AHU), is a
device used to regulate and circulate air as part of a heating, ventilating, and air-conditioning
(HVAC) system.
What is a constant air volume system? - ✅✅In a simple CAV system, the supply air flow rate
is constant, but the supply air temperature is varied to meet the thermal loads of a space. Most
CAV systems are small, and serve a single thermal zone.
What is a variable air volume system? - ✅✅Unlike constant air volume (CAV) systems,
which supply a constant airflow at a variable temperature, VAV systems vary the airflow
at a constant temperature.
What is a dual duct system? - ✅✅An air-conditioning system in which two supply
ducts run to each space being conditioned, one for cold air, the other for warm air; at
each individually controlled space, air from the two ducts is blended in a sheet-metal
box (called a mixing box) and then supplied to the conditioned space.
What is a multi zone system? - ✅✅Hot and cold air is mixed at the air handling unit
What is the hertz frequency in the USA? - ✅✅60 hertz
Most chill water systems are piped in which direction? - ✅✅Parallel
Control valves regulate flow through? - ✅✅the fan coils
What are the primary hvac equipment and systems? - ✅✅- the primary sources of
heating and cooling
- chillers and heat rejection
, - boiler
- engines and generators
- thermal storage
What are the secondary hvac equipment and systems? - ✅✅- generally located
inside of the building
- Air distribution
- Water distribution
- Air handlers and fan coils
What is an air distribution device? - ✅✅diffuser
diffuser throw air in what direction? - ✅✅horizontally
What are the noise criteria for a diffuser? - ✅✅- auditoriums 20-25
- restaurants 25-30
What velocity should air be distributed at in occupied zones? - ✅✅less than 50 fpm
What is a house keeping pad? - ✅✅4" thick pad air handling units are placed on
What is a plug fan? - ✅✅- fan that moves air inside an air handling unit
- cheap
What is a building management system? - ✅✅A computer-based control system
installed in buildings that controls and monitors the building's mechanical and electrical
equipment such as ventilation, lighting, power systems, fire systems, and security
systems.
What are the monitoring points for a BMS? - ✅✅humidity, temperature, and CO2
What is a panel filter? - ✅✅standard house filter
What is a bag filter? - ✅✅filter made of a cloth bag ordinarily about 30 feet long for
recovery of metal oxides and other solid particles suspended in a gas (as from smelting
or other furnaces)
Does a filter get better or worse as it becomes dirtier? - ✅✅Better
What is a frost stat used for? - ✅✅telling the heating coil to turn on
What are other words for an inverter? - ✅✅Variable Speed Drive & Variable Volume
Drive & Variable Velocity Drive & Variable Frequency Drive
