OBJ 5.1

Question 1

In general, the strength of lumber has been ________ (reduced/increased) as it is harvested from newer forests.

Answer 1

Reduced.

Question 2

Flitch beam

Answer 2

A flitch beam is a compound beam constructed by inserting a vertical steel plate between two pieces of lumber of the same depth and thru-bolted.

Question 3

LU/LA

Answer 3

Stands for limited use, limited application elevator. Smaller, slower elevators that provide accessibility in low-rise buildings, in both renovations and new construction.

Question 4

What climate type has the largest diurnal (day to night) temperature swing?

Answer 4

Hot and arid. Design solutions for this climate type include inner courtyards, water elements that add moisture to the air, small high clerestory windows, and plantings.

Question 5

What building types would use the following voltage types? (A) 120/240v single-phase, (B) 120/280v three-phase, (C) 277/480v three-phase, (D) 2400/4160v three-phase

Answer 5

(A) Residences and small office buildings.
(B) Small- to medium-sized commercial buildings because it allows for various electrical loads compared to 120/240v single-phase.
(C) Large commercial buildings.
(D) Very large commercial buildings and industrial buildings with a large amount of machinery.

Question 6

List the criteria used to determine the size of the roof gutter.

Answer 6

1. Roof area.

2. Maximum recorded local rainfall.

Question 7

List the criteria used to determine the size of a water heater.

Answer 7

1. Recharge time.

2. Daily peak hot water demand.

Question 8

What are the minimum water pressure requirements of (A) a shower, (B) a bathtub, and (C) a sink?

Answer 8

(A) 8 psi. (B) 20 psi. (C) 8 psi.

Question 9

List five ways to aid in crime prevention through site design.

Answer 9

1. Provide adequate lighting along primary routes and touch points.
2. Try to minimize the number of entry points into a building.
3. Maintain sightlines.
4. Have clear wayfinding.
5. Think holistically.

Question 10

List the criteria that determine the required size of a heating system in a building.

Answer 10

Calculation of the total heat loss for all the assemblies in a building combined (i.e., roof, walls, windows).

Question 11

List three water heating systems

Answer 11

1. Continuous loop: a closed-loop two-pipe system that uses a circulator pump and maintains temperature at the fixture.
2. Water heater: An insulated storage tank that heats a limited quantity of water and has a predictable recovery time.
3. Instantaneous: tankless hot water system; heats the water at the point of use.