Mep / Building Systems Exam For The Are

Front 1

Cleanout

Back 1

At least 1 cleanout required where buikding drain enters the sewer system.

Every 50'-0" in pipes under 4", Every 100'-0" in larger pipes, and where pipes change direction more than 45 degrees

Front 2

Manholes

Back 2

Used as a cleanout for large lines 10" in dia. or greater.

@ 150'-0" intervals and when a new lines joins an existing one.

Front 3

Trap

Back 3

U-shaoed and keeps out methane gasses from passing into the habitable spaces becuase of the water block.

Front 4

Interceptor

Back 4

A device often used in restaurants that catches grease, hair, string, rags, etc, so they do not pass into the sanitary sewer system.

Front 5

Sanitary lines

Back 5

mostly cast iron pipe, sometimes ceramic when used outside of the building.

Front 6

Vents

Back 6

Copper or Galv. Steel may be used. Plastic pipe can be used for residential

Front 7

Toilets

Back 7

Tank / Reservoir - 3 to 5 gallons / Flush

flush valve or flushometer toilets - turn on water @ high speed for a short period of time.

Front 8

Cesspools

Back 8

*Cheapest
*Least desierable
*Underground chamber, pourous bottom and walls.
*sewage soaks through until chamber is clogged.
*then another chamber is dug and the sewage lines rerouted.

Front 9

Septic Tank

Back 9

*lines chamber or steel tank
*solid material settles to the bottom (removed every few years)
*Liquid material passes onto leachfield
*Sizes of tank is based upon 100 gal. per day per person with a min. of 500 gallons.

Front 10

Leach / Drain Field

Back 10

*Grid of ceramic pipe laid under ground.
*ends are not together
*liquid leaks out onto a bed of gravel
*liquid then seeps into soil
*if soil is impermeable, a large basin is dug and filled with sand, liquid waste will leak into the sand.
*once it settles to the bottom of the basin the liquid is collected, Chlorinated and then returned to a local body of water.

Front 11

Surface run-off

Back 11

goes into Storm drainage

Front 12

Swales

Back 12

V-shaped sloping channels in grass that directs surface run-off to points where it may be collected and disposed of.

Front 13

Catch Basin

Back 13

*Similar to manholes except the lid is a grate.
*placed in the lowest point in the swale
*takes run-off and empties into local stream

Front 14

Steel Pipe

Back 14

*typicall joined mechanically
*2 ends are threaded with a sloping thread
*

Front 15

Relative humidity

Back 15

the ratio of the moisture content of the air to the maximum possible content @ the same temp.

Front 16

human comfort ranges depend on:

Back 16

*culture
*Recent exposure
*Health
*Age

Front 17

Psychometric chart

Back 17

A graph showing the relationships between temperature, humidity, Relative humidity and enthalpy

Front 18

Enthalpy

Back 18

Combined storage between sensible heat and latent heat stored in the air. this is also known as total heat.

Front 19

Dry bulb:

Back 19

the temp that is read on an ordinary glass thermometer.

Front 20

Wet bulb temperature

Back 20

Constant stored enthalpy. a temp attained by a glass thermometer whose bulb is covered with a wet sock and placed in an air stream moving @ 1,000 ft/min. Dry bulb results in a wet bulb depression, which is the difference between the dry and wet bulb temps.

Front 21

psychrometer

Back 21

thermometer with a sock

Front 22

sling psychrometer

Back 22

thermometer with a wet sock that is swung around in the air manually to get air movement.

Front 23

Comfort zone

Back 23

A combination of environmental and thermal conditions in which the human is comfortable. often shown on a psychometric chart.

Front 24

the higher the RH values are...

Back 24

The lower the temp needs to be for comfort.

Front 25

MRT

Back 25

does not show the psychometric chart.

MRT high, Ambient temps low for comfort zone.

MRT low, ambient temps high for comfort zone.

Front 26

Effective temp:

Back 26

Combo of the ambient air temp and the MRT

Front 27

solar design responds to 2 environmental factors

Back 27

*Sun
*Climate

Front 28

what causes the seasons?

Back 28

the changing tilt of the earth

Front 29

Declination angle

Back 29

Tilt of the north pole in relation to the position of the sun.

Front 30

Altitude Angle (ALT)

Back 30

Height of the sun in the sky

Front 31

Azimuth angle (AZ)

Back 31

Compass orientation of the sun. sun's position either east or west from due south.

Sun due east = AZ 90D east of south
Sun due south= AZ=0.
sun Due west = AZ90D west of south.

Front 32

Azimith angle measured relative to north

Back 32

Due east is AZ=90D
Due south is AZ=180D
Due west is AZ=270D