Masonry Practice Test 1
(168).jpg "Masonry Practice Test 1")
You have 1 hour to complete this test.
- 1.Control joints are considered joints that will _______shortening, shrinkage and/or reduction in the length of the wall.
- A.
Coordinate
- B.
Accommodate
- C.
Reduce
- D.
Control
- 2.A “standard hook” can be a 180° turn plus an extension of at least __________ bar diameters, but not less than ________ inches at the free end of the bar.
- A.
4, 2 ¼
- B.
4, 2 ½
- C.
2, 2 ¾
- D.
2, 3
- 3.The cleanout opening at the bottom of a masonry wall is a minimum of __________.
- A.
3 inches in any direction
- B.
4 inches by 4 inches
- C.
32 inches
- D.
2 inches in any direction
- 4.
- A.
8
- B.
6
- C.
4
- D.
2
- 5.Movements can occur from a number of sources, such as _________.
- A.
Ground settlement
- B.
Material expansion and contraction
- C.
Seismic activity
- D.
All of the above
- 6.The compressive strength of grout in concrete masonry construction is recommended to be at least _________ to _________ times the design strength of the masonry assemblage.
- A.
1.00, 1.25
- B.
1.25, 1.33
- C.
1.33, 1.45
- D.
1.50, 1.60
- 7.The minimum clearance required between reinforcing steel and the CMU in a grouted cell using coarse grout is ___________.
- A.
1 bar diameter
- B.
¼ inch
- C.
½ inch
- D.
1 inch
- 8.The maximum grout pour using the high lift grouting method for a clear cell area of 3 inches by 3 inches is _________.
- A.
5 feet
- B.
8 feet using coarse grout
- C.
12 feet
- D.
24 feet using fine grout
- 9.When the air temperature is 25°F, requirements shall include ___________.
- A.
Heating the cement
- B.
Maintaining mortar on board above freezing
- C.
Heating sand above 120°F
- D.
Heating water above 120°F
- 10.In a low lift grout pour, the grouting is stopped approximately __________below the top of the masonry unit.
- A.
½ inch
- B.
1 inch
- C.
1 ½ inch
- D.
2 inches
- 11.For coarse grout, the maximum total aggregate measured in a damp loose condition shall be _________ times the sum of the volume of the cementitious material.
- A.
3
- B.
3 ¼
- C.
4 ¼
- D.
5
- 12.When the mean daily air temperature is between 25°F and 40°F, the masonry shall be protected by covering with a weather-resistive membrane for ______hours.
- A.
12
- B.
24
- C.
36
- D.
72
- 13.Windbreaks shall be used when the temperature is below 25°F and the wind is _________.
- A.
8 miles per hour or more
- B.
10 miles per hour or more
- C.
12 miles per hour or more
- D.
Greater than 15 miles per hour
- 14.After the initial water has been introduced to the mix, mortar should be used within ____________.
- A.
30 minutes
- B.
1 hour
- C.
1 ½ hours
- D.
2 ½ hours
- 15.A common CMU size is 6” x 8” x 16”. 6” refers to the ____________.
- A.
Width
- B.
Height
- C.
Length
- 16.During hot weather conditions, newly constructed masonry shall be fog sprayed until damp at least ________ a day for the first three days.
- A.
1 time
- B.
2 times
- C.
3 times
- D.
4 times
- 17.When associated with masonry reinforcing steel, the d distance is defined as the distance from ________ to the center of reinforcing steel.
- A.
The inside of the face shell
- B.
The nearest reinforcing bar
- C.
The farthest face of the CMU
- D.
The centerline of an associated lap splice bar
- 18.When performing the Cone Penetrometer Test, the depth of penetration is measured in _______________.
- A.
Meters
- B.
Millimeters
- C.
Centimeters
- D.
Inches
- 19.The recommended slump is necessary so that grout can flow___________.
- A.
Without hydration
- B.
Completely surround the steel
- C.
Into the cracks
- D.
Without hydrostatic pressure
- 20.Current recommendations from the National Concrete Masonry Association (NCMA) based on engineering and aesthetic design, it is reasonable to maximize horizontal spacing of control joints at ________feet.
- A.
45 to 60
- B.
30 to 45
- C.
25 to 30
- D.
20 to 30
- 21.When high lift grating, the full height of any section of wall should be completed in one day, with no interruption between lifts greater than__________.
- A.
One hour
- B.
Two hours
- C.
Three hours
- D.
Four hours
- 22.Expansion joints are used to provide for movement of a wall as it expands and must contain any incompressible material.
- A.
True
- B.
False
- 23.Mortar projections in grout cells must not project more than ____ inch(es) into the cell.
- A.
0
- B.
1/4
- C.
1/2
- D.
1
- 24.The minimum cover of reinforcement, including the masonry unit, shall be _______ inch(es) when not exposed to weather.
- A.
5/8
- B.
¾
- C.
1 ½
- D.
2
- 25.Grout should be placed within _______ hours after initial water is introduced to the dry ingredients.
- A.
2 ¼
- B.
2 ½
- C.
1 ¼
- D.
1 ½
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