NCIDQ IDFX 1-3

Question 1

What is safety data sheet (SDS)?

Answer 1

A document provided by a manufacturer containing information about the physical makeup of a substance, proper storage and handling procedures, and other safety issues.

Question 2

What is composite wood veneer?

Answer 2

A product made by slicing readily available, fast-growing trees into veneers, dyeing the veneers, and then gluing them together to create an artificial log. The log is then re-sliced to produce a variety of wood veneers.

Question 3

What is clerestory?

Answer 3

This is vertically glazed area placed between two different roof levels to admit natural light.

Question 4

What is the unit of measure for the frequency of sound?

Answer 4

The hertz (Hz) is the unit of measure for this and is equal to one cycle per second.

Question 5

What is the unit of measure for the sound intensity, based on a logarithmic scale?

Answer 5

The decibel (dB) is the unit of measure for this.

Question 6

What do most people perceive when a sound increase by 10 dB?

Answer 6

When a sound increase by this amount, most people perceive a doubling in loudness.

Question 7

What frequency range can be heard by most healthy young people?

Answer 7

This range is 20 Hz to 20,000Hz

Question 8

What is the coefficient of absorption?

Answer 8

This is the ratio of the sound intensity absorbed by a material to the total sound intensity reaching the material.

Question 9

What is the noise reduction coefficient (NRC)

Answer 9

This is a single-number average of a material’s coefficients of absorption at 250Hz, 500Hz, 1000Hz, and 2000Hz, rounded to the nearest 0.05.

Question 10

What is the reverberation time?

Answer 10

This is the time it takes for the sound level in a space to decrease 60dB after the source has stopped producing the sound.

Question 11

What is the ceiling attenuation class (CAC)?

Answer 11

This is a single-number measure of the transmission loss through ceiling tiles between two closed rooms where is no barrier above the suspended ceiling.

Question 12

What percentage of a commercial building’s total energy use is typically devoted to electric vehicles lighting and the cooling it requires?

Answer 12

30-40% of a commercial building’s total energy use is typically devoted to this.

Question 13

What are the three most common types of interior glazing?

Answer 13

1. Float
2. Tempered
3. Laminated

Question 14

What are the primary elements used to make bronze?

Answer 14

Copper and Tim are used to make this material.

Question 15

What is a concrete masonry unit?

Answer 15

This building product, abbreviated CMU is also commonly known as concrete block.

Question 16

What is mean radiant temperature?

Answer 16

This is a measure is the heat a person gains from or loses to his or her surroundings through radiation. It is used in assessing how comfortable a room is.
The value is a weight average of the various surface temperatures in a room. (Taking into account an occupant’s angle of exposure to those surface) and any sunlight present.

Question 17

What are the standard depth of metal studs?

Answer 17

1 5/8” - 41mm
2 1/2” - 64mm
3 5/8” - 92mm
4”  - 102mm
6” - 152mm

Question 18

What is the generic name for fire-rated gypsum wallboard?

Answer 18

Type X is the generic name of this material.

Question 19

What are four advantages of using portland cement plaster as a finish material?

Answer 19

1. Hard and abrasion resistant
2. Water resistant
3. Easily formed into curved and ornate surface
4. A good base for wall tile

Question 20

What are four disadvantages of using portland cement plaster as a finish material?

Answer 20

1. More expensive than gypsum wallboard
2. Slower to construct with than gypsum wallboard
3. Wet and messy to work with
4. Challenging to work with, this requiring more-skilled labor

Question 21

What is a pivot?

Answer 21

This is a Type of hardware used to hang doors. It consists of a rotating bottom pin and a corresponding pin at the top of the door.

Question 22

In regards to construction, what is a plenum?

Answer 22

In commercial construction, this is the space between the building structural roof or floor and suspended ceiling.

Question 23

What effect does an acoustical ceiling have on sound?

Answer 23

This construction element mainly absorb sound.

Question 24

Stainless steel is primarily an alloy steel and an additional element. Which one?

Answer 24

Chromium is added to steel to create this material.

Question 25

What process occurs when dissimilar metals are in contract in the presence of water?

Answer 25

The process that occurs under these conditions is galvanic action.
Galvanic action is a form of electrochemical corrosion in which one metal gives up electrons to the other, corroding quickly while slowing the other metal’s corrosion.

Question 26

What types of steel floor or roof for

Among system provides generous space in both directions for pipes, ducts and conduit?

Answer 26

This is the primary benefit of an open-web steel joints system.

Question 27

What types of precast structural member is often used to provide support as a beam and as floor decking?

Answer 27

A double-tee is often used in these two applications.

Question 28

What electrical components are required for switches, outlets, lights, and locations where electrical conductors have been spliced?

Answer 28

Junction box are required at these locations.

Question 29

What is a ground fault interrupter?

Answer 29

This is an elecrical safety device that detects small current leaks and disconnects the power to a circuit.

Question 30

What are the components labeled A through D, and what purpose does each serve?

Answer 30

A. Stack vent: connects to a soil or waste stack above the highest fixture.
B. Vent stack: a vent pipe that is separate from a soil or waste stack
C. Soil stack: carries waste human waste
D. Waste stack: carries waste other than human waste

Question 31

What is the purpose of a plumbing trap?

Answer 31

The plumbing component holds a quality of water to provide a seal that prevents gases from the sewage system from entering the building.

Question 32

What is an intumescent material?

Answer 32

This a material that, when exposed to heat, expands rapidly and insulate or fills spaces to prevent the passage of fire and smoke.

Question 33

What are the components labeled A trough D?

Answer 33

A. Run of stair
B. Tread
C. Nosing
D. Riser

Question 34

What is a flight in stairway?

Answer 34

This is a series of two or more riders between one floor or landing and the next.

Question 35

What is a winding stairway?

Answer 35

This is a type of stairway that has tapered treads that are wider one end than at the other.

Question 36

What two materials have largely supplanted plywood in interior construction application?

Answer 36

Particleboard and medium density fiberboard have generally supplanted this material in interior constructiohn.

Question 37

What is a jalousie window?

Answer 37

This window type consists of individual horizontal pieces of glass that all pivot outward at once for ventilation.

Question 38

What is direct glare?

Answer 38

This results when a light source in the field of vision causes discomfort and interference with a visual task.

Question 39

What is running trim?

Answer 39

This type of molding is installed end to end.

Question 40

which finish material for woodwork provides the hardest, most durable surface?

Answer 40

When used as a finish material for woodwork, polyester has these characteristics.

Question 41

What is Lacquer?

Answer 41

This is a coating material with a high nitrocellulose content that has been modified with resins and plasticizers dissolved in a volatile solvent.

Question 42

What is solid surfacing?

Answer 42

This is a homogeneous, polymer-based surfacing material.

Question 43

Arc-fault interrupter

Answer 43

An arc-fault circuit interrupter also known as an arc-fault detection device is a circuit breaker that breaks the circuit when it detects an electric arc in the circuit it protects to prevent electrical fires

Question 44

Ground fault interrupter

GFCI

Answer 44

GFCI receptacle with red button for Test and black button for Reset
A ground fault circuit interrupter (GFCI), or Residual Current Device (RCD) is a type of circuit breaker which shuts off electric power when it senses an imbalance between the outgoing and incoming current.