Deck 8: Manufacture of Concrete Block Masonry

Question 1

A controlled amount of water and additives are then fed into the mixer and each batch is mixed for _____ .

A) 2 to 3 minutes
B) 5 to 7 minutes
C) 6 to 8 minutes
D) 10 to 12 minutes

Answer 1

C

Question 2

Concrete block have become very popular with landscaping masonry contractors and home owners for many uses.

Answer 2

True

Question 3

On the special trucks used to deliver block to the job site, the boom of the forklift has a drop reach of about _____ and is able to swing in any direction.

A) 5 feet
B) 6 feet
C) 12 feet
D) 15 feet

Answer 3

C

Question 4

Most block today have three cells instead of the older design of three cells.

Question 5

Cubes of block are allowed to open-air cure for another _____ in the storage yard before being delivered to the customer or builder.

A) 10 days
B) 28 days
C) 1 week
D) 2 weeks

Question 6

The molding machine operates at _____ cycles per minute.

A) 8
B) 10
C) 12
D) 15

Question 7

Compressive strength and size variation tests are performed ______ .

A) on one batch of block per day
B) and recorded for 14-day tests
C) as soon as the block are removed from the kilns
D) only at the customer's or contractor's request

Question 8

The cubes are moved by forklift tractors from the cubing area to the storage yard.

Question 9

Raw materials may vary in geographical areas, but all have to be able to produce a concrete masonry Chapter that conforms to ASTM requirements.

Question 10

Lighter weight concrete masonry Chapters are not required to meet the same ASTM requirements as heavy-weight block.