Multi-Family Homes Basic Knowledge

Question 1

True or False: Written specifications always take precedent over job plans or blueprints.

Answer 1

True

Question 2

What are commercial specifications called?

Answer 2

Divisions

Question 3

What’s the most common type of HVAC equipment used in commercial settings?

Answer 3

RTU

Question 4

The shop drawings you create will become _______

Answer 4

Specifications

Question 5

What are the two standards engineers like to refer to?

Answer 5

SMACNA & ASHRAE

Question 6

What are the three ways heat pumps collect heat? And what method is the most common?

Answer 6

Ground to Air (geothermal)

Water to air

Air to Air is the most common

Question 7

Light commercial multi equipment systems almost always incorporate cooling into their design because of heat gain.

What are the four types of heat gain these structures experience?

Answer 7

Abundance of windows

Equipment and lighting

Infiltration

People

Question 8

Rooftop HVAC units incorporate outside air into the supply air stream using a what?

Answer 8

Fresh air economizer

Question 9

Why are RTU’s a top choice for mechanical engineers?

Answer 9

Ease of access

Won’t disturb business during service

Question 10

Roof mounted equipment is also called __________ because they combine, heating cooling and ventilation

Answer 10

Packaged units

Question 11

Motorized zone dampers, when used with one piece of air handling equipment help with what?

Answer 11

Decreases the ammount of energy needed, increases efficiency and increases comfort

Question 12

True or False: Each zone is individually controlled with its own thermostat

Answer 12

True

Question 13

What does a Bypass Damper do? And where’s it installed?

Answer 13

Provides pressure relief when one zone is calling for heat and another isn’t

It’s installed between the supply air and the return air plenum

Question 14

True or False: 2 furnaces or fan coils in a home can share the same return air trunk line

Answer 14

False

Question 15

What would be used in a home where minimal bulk heads are desired?

Answer 15

High velocity fan coils

Question 16

In a partially dedicated HRV system, where is the supply air ducted into?

Answer 16

The return trunk line

Question 17

Range Exhaust Fans require a MUA over what CFM?

Answer 17

400 CFM

Question 18

What are duct heaters rated in?

Answer 18

Kilowatts

Question 19

What are interlock relays and time delays relays?

Answer 19

Interlock relays connect an exhaust fan to a MUA
Time delay relays make sure the fresh air damper is opened

Question 20

What are the two key points to High Efficient particulate arrestor (HEPA) filters

Answer 20

They are used where clean air is critical

They are one time use throw away filters

Question 21

What is an As-Built drawing?

Answer 21

A drawing provided by the installer of a completed installation. The installer must provide this to record any changes that may have happened

Question 22

What are the most basic multi-family structures?

Answer 22

Legal suits and Duplexes

Question 23

If a builder of a duplex wants to maintain the R2000 building code requirements where must the fire rated wall be terminated?

Answer 23

At the Soffits

Question 24

True or False: Multi family requires mechanical ventilation

Answer 24

True

Question 25

What are the most common types of low-rise structures?

Answer 25

Three or four storey walk up

Question 26

In low rise structures AC is not always installed as a central cooling system becomes complex and expensive. If cooling is provided how is this usually accomplished?

Answer 26

Through a Heat Pump

Question 27

Nursing homes with patient exam rooms should operate at a negative or positive pressure?

Answer 27

Negative Ensures odors are not released into living areas

Question 28

True or False: a MUA unit has no return vent

Answer 28

True

Question 29

Hallways and stairwells are positively pressurized. Why is this?

Answer 29

To provide an evacuation path in case of fire. Also helps odors from migrating

Question 30

What is an indirect fired MUA?

Answer 30

Has a heat exchanger

Question 31

Code states that heating facilities must maintain an indoor air temperature of how many degrees?

Answer 31

22° C 72° F

Question 32

What are some negative pressure zones

Answer 32

Commercial kitchens Exam rooms Residential suits Parkades