Deck 7: Development of Concrete Block

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.

A) Pier block
B) Sash block
C) Header block
D) Lintel block

Answer 1

D

Question 2

By 1924, the automatic-tamping machine could produce _____ block a day.

A) 3000
B) 1000
C) 750
D) 250

Answer 2

A

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.

A) Bull-nose
B) Corner
C) Solid
D) Jamb

Answer 3

A

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.

Question 5

Joseph Gibbs's cast his block in a mold, but the mold had dividers, so the finished block _____ .

A) split easily
B) contained large frogs
C) were not as durable
D) had hollow cells

Question 6

Concrete block is a very durable building material.

Question 7

Block sizes are expressed as _____ sizes, which means that each dimension includes the mortar joint.

A) sectional
B) dimensional
C) nominal
D) architectural

Question 8

Sound _____ is the measure of the loss of sound between two points.

A) transmission class
B) absorption
C) resistance
D) rating

Question 9

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

Question 10

_____ are sand and pea gravel or some inorganic substitute particles mixed with portland cement to form a concrete block.

A) Amalgams
B) Blends
C) Aggregates
D) Fusions

Question 11

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

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.

A) 1200, 1400
B) 1250, 1500
C) 15,00, 1750
D) 1700, 1900

Question 13

Today, _____ block can be made on a single machine in a 10-hour day.

A) 150,000
B) 75,000
C) 15,000
D) 5,000

Question 14

______ is seldom used any more to make lightweight concrete block due to the high cost of importing it.

A) Expanded shale
B) Pumice
C) Fly ash
D) Slag

Question 15

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