PX Building Systems And Integration

Question 1

What is displacement ventilation?

Answer 1

It is an air distribution system where supply air starts at the ground floor and rises to return to the air grilles in the ceiling

Question 2

What is a three way switch?

Answer 2

It is a switch that allows you to control a light from two different locations

Question 3

What are the two most important variables affecting sound transmission through a building element?

Answer 3

Mass and stiffness

Question 4

What is sound transmission class (STC)?

Answer 4

It is the rating of a partitions ability to reduce sound transmission

Question 5

5 basic ways to control sound transmission through a partition

Answer 5

1. Increase the mass
2. Provide additional resilience
3. Insulate the cavity
4. Seal all the cracks between components
5. Provide sealed openings

Question 6

What is daylight factor (DF)?

Answer 6

Ratio of illuminance point on a horizontal indoor surface to an unobstructed exterior horizontal illuminance

Question 7

What are the components of a fire-rated door assembly?

Answer 7

Door, frame, and hardware

Question 8

What is a sole plate?

Answer 8

Horizontal wood that serves as the base for the studs in a wood stud partition

Question 9

What’s the difference between residential and commercial wallboard partitions?

Answer 9

Residential wallboard partitions are 2x4 wood studs with 1/2” wallboard

Commercial wallboard partitions are metal studs with 5/8” studs

Question 10

How is a fire-rated suspended acoustic ceiling different from a standard non-rated ceiling?

Answer 10

-it’s part of an entire fire-rated floor and ceiling assembly
-the tiles must be rated mineral tiles
-must use hold-down clips
-must have expansion slots in the grid

Question 11

What are the two types of concrete structural systems?

Answer 11

Cast-in-place and precast

Question 12

When would a flat plate concrete construction system be used?

Answer 12

This would be used in a situation where floor-to-floor heights are kept to a minimum

Question 13

What is live load?

Answer 13

Weight of people, furniture, and moveable equipment

Question 14

What is the type of load created on a building by the force of wind or an earthquake?

Answer 14

Lateral load

Question 15

What is required at the top of a partition to accommodate deflection of the floor above?

Answer 15

A slip joint

Question 16

What is a core drill?

Answer 16

It is a hole between 2”-4”D drilled through concrete floor to accommodate conduits for phone and data

Question 17

Why should post-tensioned concrete slabs never be cut into?

Answer 17

They should never be cut into because the tendons are under high stress

Question 18

What are joists and what are they usually made of?

Answer 18

Joists are horizontal repetitive elements used to support floors and they’re usually made with 2”W wood

Question 19

How far are residential studs and joists spaced apart?

Answer 19

16” on center

Question 20

What is a chase wall?

Answer 20

It is two runs of studs separated by a space large enough to accommodate pipes

Question 21

What is an access door?

Answer 21

It is an opening used to provide access to mechanical and electrical components behind walls

Question 22

What are the two methods to measure speech privacy in offices?

Answer 22

1. Articulation class
2. Articulation index

Question 23

What are the four types of fire detection devices?

Answer 23

1. Photoelectric detectors
2. Rise-of-temperature detectors
3. Ionization detectors
4. Flame detectors