Question 1

_____ are U-shaped and hollow in the center but have a solid bottom and are similar to a bond beam block with the exception that they have a greater amount of void to be filled with concrete.&#10;A) Pier block&#10;B) Sash block&#10;C) Header block&#10;D) Lintel block

Accepted Answer

Lintel blocks are U-shaped and hollow in the center but have a solid bottom, designed to span openings and provide structural support, similar to bond beam blocks but with more void space for concrete.

Question 2

By 1924, the automatic-tamping machine could produce _____ block a day.&#10;A) 3000&#10;B) 1000&#10;C) 750&#10;D) 250

Accepted Answer

Based on the information given, the automatic-tamping machine could produce 3000 block a day by 1924.

Question 3

______ block are designed and made with a rounded corner edge so it will not chip easily and are very popular on interior commercial walls where there is a lot of people traffic.&#10;A) Bull-nose&#10;B) Corner&#10;C) Solid&#10;D) Jamb

Accepted Answer

Bull-nose blocks are specifically designed and made with a rounded corner edge so that they do not chip easily, making them an ideal choice for interior commercial walls with heavy people traffic. Corner, solid, and jamb blocks do not have this specific feature.

Question 4

Early concrete masons combined quick lime and moist sand, placed the mixture in a mold under pressure, and cured it with steam to make a usable block.

Accepted Answer

This statement is true. This method of making concrete blocks was commonly used in the 19th and early 20th century before newer techniques were developed.

Question 5

Joseph Gibbs's cast his block in a mold, but the mold had dividers, so the finished block _____ .&#10;A) split easily&#10;B) contained large frogs&#10;C) were not as durable&#10;D) had hollow cells

Accepted Answer

The dividers in the mold would have created hollow spaces in the finished block, resulting in it having hollow cells.

Question 6

Concrete block is a very durable building material.

Accepted Answer

Concrete block is a highly durable building material that can easily withstand weather conditions, fire, and impacts.

Question 7

Block sizes are expressed as _____ sizes, which means that each dimension includes the mortar joint.&#10;A) sectional&#10;B) dimensional&#10;C) nominal&#10;D) architectural

Accepted Answer

Nominal sizes include the mortar joint, while dimensional or actual sizes do not include the mortar joint. Architectural sizes typically refer to traditional sizes used in historical buildings, while sectional sizes refer to the size of a specific section of a larger structure.

Question 8

Sound _____ is the measure of the loss of sound between two points.&#10;A) transmission class&#10;B) absorption&#10;C) resistance&#10;D) rating

Accepted Answer

Sound transmission class (STC) is a measure used to quantify the loss of sound between two points, typically used to rate the effectiveness of walls, ceilings, floors, and doors in blocking sound.

Question 9

With two workers, the hand-tamping process of making block could produce about 500 block per day.

Accepted Answer

The hand-tamping process of making blocks was much less efficient, typically allowing two workers to produce only about 50 to 100 blocks per day, not 500.

Question 10

_____ are sand and pea gravel or some inorganic substitute particles mixed with portland cement to form a concrete block.&#10;A) Amalgams&#10;B) Blends&#10;C) Aggregates&#10;D) Fusions

Accepted Answer

Aggregates are small particles mixed with cement to form a concrete block. Sand, pea gravel, or other inorganic substances are often used as aggregates because they provide strength and stability to the concrete mixture. Amalgams, blends, and fusions are not used in the production of concrete blocks.

Question 11

Lightweight aggregates used in block making today include expanded fly as, expanded shale, expanded clay, expanded slag, and expanded slate.

Accepted Answer

The answer of Lightweight aggregates used in block making today...

Question 12

Compressive strength based on net cross-sectional area is required to be at _____ psi for individual Chapters and _____ psi for the average three Chapters.&#10;A) 1200, 1400&#10;B) 1250, 1500&#10;C) 15,00, 1750&#10;D) 1700, 1900

Accepted Answer

The answer of Compressive strength based on net cross-sectional area...

Question 13

Today, _____ block can be made on a single machine in a 10-hour day.&#10;A) 150,000&#10;B) 75,000&#10;C) 15,000&#10;D) 5,000

Accepted Answer

The answer of Today, _____ block can be made on...

Question 14

______ is seldom used any more to make lightweight concrete block due to the high cost of importing it.&#10;A) Expanded shale&#10;B) Pumice&#10;C) Fly ash&#10;D) Slag

Accepted Answer

The answer of ______ is seldom used any more to...

Question 15

Block names can be determined by the design itself or can be a description of the block's function in construction.

Accepted Answer

The answer of Block names can be determined by the...

Deck 7: Development of Concrete Block