Construction Drawings, Schedules, and Specifications

Question 1

All air systems

Answer 1

cool or heat spaces by conditioned air alone. heat is transported by supply and return ducts

Question 2

HVAC systems for commercial buildings

Answer 2

VAV (Variable air volume)
High velocity dual duct
Constant volume with rehear
multizone system

Question 3

plenum

Answer 3

space between the suspended ceiling and structural floor above

Question 4

All water heating systems

Answer 4

use some type of coil unit called a convector in each space through which hot water is circulated

Question 5

chase

Answer 5

enclosed vertical space used only to accommodate ducts or pipes

Question 6

mixing box

Answer 6

adjusts the quantity or temperature of air going into a space from the main air supply lines, reduces the velocity of air, and attenuates noise

Question 7

access flooring

Answer 7

false floor of individual panels raised above the structural floor with pedestals used to access electrical, communication and computer wiring

Question 8

Plenum requirements

Answer 8

where a plenum is used as a return air space, combustible materials (wood, exposed wire) are prohibited in the space
some telephone and communication wire are plenum rated

Question 9

Air supply options

Answer 9

1’ - 2’ square diffusers are common in suspended ceiling systems
Slot air diffusers are long and skinny for smaller supply or return

Question 10

Mechanical plan symbols

Answer 10

see sheet 13-8 in textbook

Question 11

electrical conducters

Answer 11

extend from circuit breaker boxes to the individual switches, lights, and outlets

Question 12

outlet spacing

Answer 12

must be placed no farther than 12 ft apart

must be an outlet on each awl furniture might be placed on

Question 13

dedicated circuits

Answer 13

outlets on their own circuit that prevent various types of electrical interference from disturbing sensitive electrical equipment connected to them

Question 14

three types of protections provided in electrical wiring

Answer 14

grounding - a separate wire in addition to the two that provide power that prevents a dangerous shock if someone touches an appliance with a short circuit
GFCI - ground fault circuit interrupters are devices that detect small current leaks and disconnect the power to the circuit or appliance
AFCI - arc fault circuit interrupter - provides protection from the effects of arc faults

Question 15

two components of plumbing

Answer 15

water supply - includes hot and cold water supplied by small pipes under pressure
drainage - work by gravity, must be sloped downward to carry away wastes. vent pipes required. drains must be sloped min. 1/4” / ft

Question 16

plumbing vents

Answer 16

pipes that are connected to the drainage system at various locations, open to outside air, and designed to allow built up sewage gases to escape instead of stay in the water in the traps and allow pressure in the system to equalize so discharging waste does not create a siphon that would drain the water out of the traps

Question 17

soil vs waste stack

Answer 17

soil stack - carries human waste from toilets

waste stack - carries waste other than human waste

Question 18

stack vent

Answer 18

a vent connected to a soil or waste stack above the highest fixture

Question 19

vent stack

Answer 19

separate pipe from the stack vent used for venting

Question 20

compartmentation

Answer 20

to contain a fire a limit its spread, both to allow building occupants to escape and to protect other parts of the building that are not initially subject to the fire

Question 21

four types of fire detection devices

Answer 21

1. ionization detector - responds to products of combustion-ionized particles rather than to smoke
2. photoelectric detectors - respond to smoke, which obscures a light beam in the device
3. rise of temperature detector - sense the presence of heat and can be set to trip an alarm when a particular temperature is reached in the room
4. flame detectors - respond to an infrared or ultraviolet radiation given off by flames

Question 22

types of sprinklers

Answer 22

recessed - smooth flush with ceiling, cap falls off when fire detected and sprinkler lowers and turns on
upright - used with exposed plumbing from above
pendent - typical on finished ceilings with heads suspended down a few inches
sidewall - plumbed from the walls

Question 23

standpipes

Answer 23

pipes that run the height of a building and provide water outlets at each floor to which fire fighting hoses can be connected

Question 24

Magnetic contacts (perimeter protection)

Answer 24

used on doors and windows to sound an alarm when contact is broken or send a signal to a central monitoring and control station

Question 25

Glass break detectors (perimeter protection)

Answer 25

sense when a window is broken or cut by using metallic foil or with small vibration detector on glass

Question 26

window screens (perimeter protection)

Answer 26

screens with fine wires embedded in them that can be used to set off an alarm when they are cut or broken

Question 27

photoelectric cells (perimeter protection)

Answer 27

these cells detect when the beam has been broken , either by a door opening, or by someone passing through an opening

Question 28

scale of construction floor plans

Answer 28

1/8" = 1'-0"
1/4" = 1'-0"

Question 29

finish schedule

Answer 29

shows room numbers and floor, base, wall and ceiling finishes

Question 30

scale of detail drawing

Answer 30

1” = 1’-0”
1 1/2” = 1’-0”
3” = 1’-0”