Masonry Practice Test 2
.jpg "Masonry Practice Test 2")
You have 1 hour to complete this test.
- 1.Bars spliced by non-contact lap splices shall not be spaced transversely farther apart than _______ the required length of lap nor more than 8 inches.
- A.
1/5
- B.
1/8
- C.
1/4
- D.
3/8
- 2.Walls should be protected from rain ________, depending on the temperature, so that the mortar is fully set and bond has occurred.
- A.
10 to 20 hours
- B.
15 to 24 hours
- C.
24 to 48 hours
- D.
32 to 48 hours
- 3.Control joints provide for movement of a wall in contraction and can have some solid masonry or grout in the joint.
- A.
True
- B.
False
- 4.For low-lift grouting, grout shall not be poured until the mortar has set _____ to adequately withstand the pressure of the grout.
- A.
At least 16 hrs. past final set
- B.
A sufficient time
- C.
To full strength
- D.
A minimum of 24 hrs
- 5.Due to improper location or failure to install dowels, new dowels may be __________.
- A.
Not necessary
- B.
Disputed by the contractor
- C.
Required
- D.
Part of a code provision
- 6.When ambient temperature is between 40°F and 32°F, _____ shall be heated to produce mortar between 40°F and 120°F.
- A.
Concrete sand
- B.
Drinking water
- C.
Mortar sand or mixing water
- D.
Mortar sand and mixing water
- 7.The maximum tie spacing may not exceed 16 longitudinal bar diameters, __________ tie diameters, or the least column dimensions.
- A.
12
- B.
16
- C.
24
- D.
48
- 8.In order to obtain a 28 day grout compressive strength of 2,000 psi, the seven day test, if taken, should be at least _______psi.
- A.
1000
- B.
1200
- C.
1500
- D.
2000
- 9.Control joints must be ______ with structural anchoring requirements of intersection walls.
- A.
Independent
- B.
Anchored
- C.
Coordinated
- D.
Separated
- 10.The normal head size of a vibrator is ___________.
- A.
¾”
- B.
1"
- C.
¾” to 1 ½”
- D.
1” to 1 ½”
- 11.When the outside air temperature is less than 20°F, ___________ shall be provided to maintain the air temperature above 32°F.
- A.
Mason jackets
- B.
Heated mortar boards
- C.
Enclosures or auxiliary heat
- D.
Enclosures and auxiliary heat
- 12.Control joints are for the purpose of ____________.
- A.
Allowing concrete block to expand
- B.
Allowing the block to shrink without widespread cracking
- C.
Strengthening walls
- D.
Weakening walls
- 13.Special grout lifts of 12.67 feet maximum are permitted when ________.
- A.
Masonry has cured for at least 4 hours
- B.
Grout slump is between 10 and 11 inches
- C.
There are no intermediate reinforced bond beams
- D.
All of the above
- 14.Grout shall have a minimum compressive strength of _________psi at 28 days.
- A.
1500
- B.
1900
- C.
2000
- D.
2500
- 15.Masonry walls that are covered with plastic or canvas should cover the top of the wall and hang over at least _________ on the face.
- A.
12"
- B.
2'
- C.
3'
- D.
4'
- 16.The maximum spacing of cleanouts in a solid grouted system shall not exceed _________ inches.
- A.
8
- B.
24
- C.
32
- D.
48
- 17.According to ASTM C 476, grout prepared at the jobsite shall be mixed for a minimum of ___________minutes.
- A.
1
- B.
3
- C.
5
- D.
10
- 18.The temperature of masonry units shall not be less than _____ when laid in masonry.
- A.
10°F
- B.
20°F
- C.
30°F
- D.
40°F
- 19.When applicable, prisms shall be grouted not less than __________, nor more than ___________ after construction of the prism.
- A.
6 hours /12 hours
- B.
1 day/ 2 days
- C.
1 day/ 3 days
- D.
2 days/ 3 days
- 20.Grout pours _________may be consolidated by puddling.
- A.
12 inches or less
- B.
Less than 24 inches
- C.
That are non structural
- D.
In partially grouted walls
- 21.With masonry units, bonding is achieved by using _________.
- A.
Cement
- B.
Mortar
- C.
Grout
- D.
Mortar and grout
- 22.If the mean daily air temperature is 20°F, or below, the masonry temperature is ____________.
- A.
To be maintained below 20°F
- B.
To be maintained at 20°F or above
- C.
To be maintained at 32°F
- D.
To be maintained above 32°F
- 23.Each masonry prism shall be constructed in _________.
- A.
The laboratory
- B.
The contractors yard
- C.
An open moisture tight bag
- D.
A shelter
- 24.When installing control joints, the mortar joint should be raked _________ inch deep.
- A.
½
- B.
1
- C.
5/8
- D.
3/4
- 25.The minimum grout space dimension for AAC masonry units shall be _______ or a 3 inch diameter cell.
- A.
2” x 2”
- B.
2 ½” x 2 ½”
- C.
3” x 3”
- D.
3 ½” x 3 ½”
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