Test 1

Question 1

Floating should be followed by trowling when?

Answer 1

A smooth hard, dense surface is desired

Question 2

Methods for placing concrete under water include?

Answer 2

Tremie

Question 3

Plastic shrinkage cracks occur when?

Answer 3

Water evaporates from the surface faster than it appears on the surface during the bleeding process

Question 4

Chemical process by which cement reacts with water is called?

Answer 4

Hydration

Question 5

Slump is used to measure the consistency of?

Answer 5

Concrete

Question 6

Type 1 cement is

Answer 6

A general purpose cement suitable for all uses where the special properties of others are not required such as sulfate attack from soil or water or temperature rise due to heat generated by hydration

Question 7

Type V cement is used principally where?

Answer 7

Where soils or ground waters have a high sulfate content

Question 8

A concrete slab is being placed with a vibratory screed. What is the maximum slump according to UBC?
A) 1’’
B) 2’’
C) 4’’
D) 3’’

Answer 8

D) 3’’

Question 9

According to OSHA air can be used for cleaning purposes if reduced to less than?
OSHA 1926.302

Answer 9

30 PSI

Question 10

What does not affect pressure on a concrete form?

Answer 10

Air Entrainment

Question 11

What are ganged forms?

Answer 11

Forms that are placed by a crane

Question 12

What is the minimum distance from rebar to the ground in concrete wall?

Answer 12

1 1/2 inches

Question 13

Which is not an approved fastener for tilt up walls?

Answer 13

Floor strip and dowel

Question 14

According to OSHA portable tanks used for storage of flammable liquids shall be placed at least how far from any building?
A) 25’
B) 10’
C) 15’
D) 20’

Answer 14

D) 20’

Question 15

According to OSHA a scaffold plank less than 10’ in length may extend over and support a maximum distance of____.
A) 12’
B) 10’
C) 13’
D) 11’

Answer 15

A) 12’

Question 16

Given the scale is 4’x8’ platform guardrails and toe boards are required by OSHA if the scaffold form is what minimum distance above the ground ____.
A) 11’
B) 12’
C) 10’
D) 9’

Answer 16

C) 10’

Question 17

According to OSHA the positioning device system shall be rigged so an employee can fall no further than ____.
A) 4’
B) 3’
C) 1’
D) 2’

Answer 17

D) 2’

Question 18

According to OSHA a work man tying to reinforce steel shall be protected from falls if the worker level is a minimum of how far above the next lowest level?
A) 12’
B) 6’
C) 8’
D) 16’

Answer 18

B) 6’

Question 19

On a pier, what constitutes the width of the footing?

Answer 19

Type of soil

Question 20

What is the minimum strength of concrete in regular non freezing conditions?
A) 250 psi
B) 500 psi
C) 2,500 psi
D) 1,000 psi

Answer 20

C) 2,500 psi

Question 21

When are employees allowed to ride on the scaffold that is being moved?

Answer 21

When height to base ratio is two to one or less