If using a compressor to provide air, before using that air supply to blow off dust from clothing or body, the pressure must be reduced to what maximum amount:

30 psi

If using a batterboard layout for footers, if the rod reading is 6.2 and the top of the batterboards must be 2'6" higher than the reading, what will the correct reading at the top of the batterboards be:

3.7

If the footing bottom reading is to be 94, the benchmark reads 100 and the backsite reading is 4.70, what will the rod reading for the trench be:

10.7

What is the approximate volume shrinkage for newly placed concrete:

.05%

If employees are working in a trench 4 1/2 feet deep within what maximum distance from a ladder for egress must ladders be placed:

25’

Which of following numbers produces a square:

3-4-5

What is the lowest grade plywood that can be used for a concrete form:

B-B

If using a builder's level to set a cut stake for an excavation of a trench, the bottom of the trench will be at 94.00, the backsite to the benchmark (elevation 102.50) has a rod reading of 4.70 and a rod reading on the cut stake of 6.20, so what does the stake read:

C7.00

What concrete would be used to increase curing time in cold weather:

Ill

What does grade 40 refer to:

40000 PPSI tensile

What is the most common size of wire tie used for rebar installation:

What is the minimum number of rebar required for a vertical column:

What concrete finish is provided for concrete that will be covered with earth:

class 3 (I||)

If using vibratory placement for concrete, which of the following is true:

allows the use of larger aggregate

What is the problem with insulated concrete forms:

may blowout during pour of care is not exercised

What is placed at the bottom of a beam form:

1X nominal

What effect does high placement temperatures have on concrete:

decreases slump

The heat produced from setting concrete is called what:

heat of hydration

If embedding a wood girder in concrete, how much space is left on all sides of the girder:

1/2"

What is the minimum amount of time necessary for concrete to cure to 70% of its design strength (not including high early):

7 days

Initial mixing time for a concrete batch over 1 cubic yard increases by what amount of time for each 1/2 cubic yard of material:

15 seconds

Considering the placement of rebar, which has the least effect for incorrect placement:

longitudinal

Concrete in walls, footings or beams of appreciable height should be placed in horizontal layers not exceeding:

18”

How much water is allowed to accumalate in a working open trench:

0”

Lifting materials overhead requires all exposed workers to be wearing:

hard hats

What is the most common cause of segregation in concrete:

too much water

What do you call the water that comes to the top of newly placed concrete:

bleed

What concrete is referred to as high-early:

Type IlI

Spalling, crazing and dusting of concrete is caused by what:

over finishing

What is the usual traveling speed for a slip form:

6-12 inches per hour

What slump of concrete is desired when using a vibrator in a form:

1-2

A cubic yard is defined as volume produced by multiplying the length times the width times what in feet divided by 27:

depth

What is the required slope for soils away from the structure:

A 45 degree angle produces what percentage of slope:

100