NCIDQ IDPX - 2-3

Question 1

What is displacement ventilation?

Answer 1

This is an air distribution system in witch supply air originates at floor level and rises to return air grills in the ceiling.

Question 2

What is a three-way switch?

Answer 2

This is a device that allows users to control a light from two different locations.

Question 3

What are the two most important variables in controlling sound transmission trough a building elements?

Answer 3

1. Mass

2. Stiffness

Question 4

What is the sound transmission class (STC) of a partition?

Answer 4

This is a single-number rating of a partition’s ability to reduce sound transmission.

Question 5

In a large room, where is the most effective place to install a sound-absorbing material?

Answer 5

Ceiling

Question 6

What are five basic ways to control sound transmission through a partition?

Answer 6

1. Increase the mass
2. Provide additional resilience
3. Insulate the cavity
4. Seal all cracks between construction components
5. Provide sealed openings, such as doors and windows

Question 7

What are some ways to increase speech privacy in a large space?

Answer 7

1. Use highly absorptive ceiling materials
2. Create distance between noisy activities
3. Use space dividers to reduce sound transmission
4. arrange hard surfaces to minimize reflected sound
5. Use a well-designed background masking system

Question 8

What is a daylight factor (DF)?

Answer 8

This is the ratio of the indoor illuminance at a point on a horizontal surface to the unobstructed exterior horizontal illuminance.

Question 9

What type of construction element is shown, and what are the components labeled A, B and C?

Answer 9

This illustration shows a section of a standard wood doorframe in a wood stud partition, including the stop (A), the casing trim (B), anc the shim (C)

Question 10

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

Answer 10

These consists of the door itself (including glazing, if any), the frame, and hardware.

Question 11

What is a sole plate?

Answer 11

This is a horizontal wood member that serves as the base for the studs in a woods stud partition.

Question 12

What are the common difference between residential and commercial construction of wallboard partitions?

Answer 12

Residential: uses 2 x 4 wood studs with 1/2” (13mm) wallboard
Commercial: studs with 5/8” (16mm) wallboard

Question 13

Name of door components… in diagram…

Answer 13

(A) Head
(B) Jamb
(C) Threshold or Sill

Question 14

What types of construction element is shown, and what are the components labeled A and B?

Answer 14

This illustration shows a suspended gypsum wallboard ceiling, including (A) a cold-rolled steel channel, sometimes called a black iron, and (B) a furring channel, sometimes called a hat channel

Question 15

What four characteristics distinguish a fire-rated, suspended acoustical ceiling from a non-rated standard ceiling?

Answer 15

1. It is only part of an entire fire-rated floor-ceiling assembly
2. Its tiles must be rated mineral tiles
3. It uses hold-down clips
4. It must have expansion slots in the grid

Question 16

What are the two major types of concrete structural systems?

Answer 16

1. Cast-in-place

2. Precast

Question 17

What types of concrete system is likely to be found where floor-to-floor heights are kept to a minimum?

Answer 17

A flat plate construction system would probably be used in this situation

Question 18

What are live loads?

Answer 18

What are live loads? These are the wights of people, furniture, and movable equipment.

Question 19

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

Answer 19

A lateral load on a building is caused by one of these forces.

Question 20

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

Answer 20

A slip joint is required at the top of a partition to compensate for this condition

Question 21

What is a core drill?

Answer 21

This is a small hole with a diameter of 2” to 4” (50mm to 100mm) drilled through a concrete floor to accommodate conduits for electrical, telephone, and data wiring.

Question 22

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

Answer 22

The tendons of this construction elements should never be cut because they are under high stress.

Question 23

What are joist, and what are they typically made of?

Answer 23

These are horizontal repetitive elements used to support floors. They are typically made from wood members with a normal width of 2” (50mm)

Question 24

What is the typical spacing for residential studs and joists?

Answer 24

typically spaced 16” (406 mm) on center.

Question 25

what is a chase wall?

Answer 25

This consists of two runs of studs separated by a space large enough to to accommodate pipes.

Question 26

What is an access door?

Answer 26

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

Question 27

What is dedicated circuit?

Answer 27

This is a circuit that contains a single electrical outlet.

Question 28

What is compartmentation in interior design?

Answer 28

This is the particle of separating area of a building with fire-rated construction in order to contain a fire to one area and limit its spread.

Question 29

What two methods are used to measure speech privacy in open offices?

Answer 29

1. Articulation class | 2. Articulation index

Question 30

What are four types of fire detection devices?

Answer 30

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

Question 31

What are five causes of building movement that must be considered when detailing?

Answer 31

1. dead-load deflection 2. lateral loading from wind or seismic activity 3. water absorption 4. live-load deflection 5. temperature changes

Question 32

What is a tolerance?

Answer 32

This is the amount of allowable variation from a given line, dimension, or size