Masonry Practice Test 2

1. Due to improper location or failure to install dowels, new dowels may be __________.

Not necessary

Disputed by the contractor

Required

Part of a code provision

PG 166

Explanation

PG 166

2. Special grout lifts of 12.67 feet maximum are permitted when ________.

Masonry has cured for at least 4 hours

Grout slump is between 10 and 11 inches

There are no intermediate reinforced bond beams

All of the above

PG 205, 206 & 213

Explanation

PG 205, 206 & 213

3. Walls should be protected from rain ________, depending on the temperature, so that the mortar is fully set and bond has occurred.

10 to 20 hours

15 to 24 hours

24 to 48 hours

32 to 48 hours

PG 296

Explanation

PG 296

4. Grout shall have a minimum compressive strength of _________psi at 28 days.

1500

1900

2000

2500

PG 85

Explanation

PG 85

5. Control joints are for the purpose of ____________.

Allowing concrete block to expand

Allowing the block to shrink without widespread cracking

Strengthening walls

Weakening walls

PG 273

Explanation

PG 273

6. For low-lift grouting, grout shall not be poured until the mortar has set _____ to adequately withstand the pressure of the grout.

At least 16 hrs. past final set

A sufficient time

To full strength

A minimum of 24 hrs

PG 207, 2nd paragraph

Explanation

PG 207, 2nd paragraph

7. Grout pours _________may be consolidated by puddling.

12 inches or less

Less than 24 inches

That are non structural

In partially grouted walls

PG 210

Explanation

PG 210

8. Each masonry prism shall be constructed in _________.

The laboratory

The contractors yard

An open moisture tight bag

A shelter

PG 88

Explanation

PG 88

9. The normal head size of a vibrator is ___________.

¾”

1"

¾” to 1 ½”

1” to 1 ½”

PG 214

Explanation

PG 214

10. According to ASTM C 476, grout prepared at the jobsite shall be mixed for a minimum of ___________minutes.

1

3

5

10

PG 70

Explanation

PG 70

11. Control joints must be ______ with structural anchoring requirements of intersection walls.

Independent

Anchored

Coordinated

Separated

PG 277

Explanation

PG 277

12. When the outside air temperature is less than 20°F, ___________ shall be provided to maintain the air temperature above 32°F.

Mason jackets

Heated mortar boards

Enclosures or auxiliary heat

Enclosures and auxiliary heat

PG 283 & 289

Explanation

PG 283 & 289

13. The minimum grout space dimension for AAC masonry units shall be _______ or a 3 inch diameter cell.

2” x 2”

2 ½” x 2 ½”

3” x 3”

3 ½” x 3 ½”

PG 206

Explanation

PG 206

14. The area of reinforcing bars placed in a cell or in a course of hollow unit construction shall not exceed _________% of the cell area.

1

2

3

4

PG 158 & 159

Explanation

PG 158 & 159

15. With masonry units, bonding is achieved by using _________.

Cement

Mortar

Grout

Mortar and grout

Masonry units, such as bricks or concrete blocks, require bonding to ensure structural stability. Bonding is achieved by using mortar and grout. Mortar is a mixture of cement, sand, and water that is used to bind the masonry units together. It provides a strong adhesive bond between the units. Grout, on the other hand, is a mixture of cement, sand, and water that is used to fill the gaps between the masonry units. It helps to further strengthen the structure and improve its appearance. Therefore, both mortar and grout are essential for achieving proper bonding in masonry construction.

Explanation

Masonry units, such as bricks or concrete blocks, require bonding to ensure structural stability. Bonding is achieved by using mortar and grout. Mortar is a mixture of cement, sand, and water that is used to bind the masonry units together. It provides a strong adhesive bond between the units. Grout, on the other hand, is a mixture of cement, sand, and water that is used to fill the gaps between the masonry units. It helps to further strengthen the structure and improve its appearance. Therefore, both mortar and grout are essential for achieving proper bonding in masonry construction.

16. Control joints provide for movement of a wall in contraction and can have some solid masonry or grout in the joint.

True

False

PG 279

Explanation

PG 279

17. 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.

1000

1200

1500

2000

PG 86

Explanation

PG 86

18. If the mean daily air temperature is 20°F, or below, the masonry temperature is ____________.

To be maintained below 20°F

To be maintained at 20°F or above

To be maintained at 32°F

To be maintained above 32°F

PG 288

Explanation

PG 288

19. When ambient temperature is between 40°F and 32°F, _____ shall be heated to produce mortar between 40°F and 120°F.

Concrete sand

Drinking water

Mortar sand or mixing water

Mortar sand and mixing water

PG 288

Explanation

PG 288

20. Masonry walls that are covered with plastic or canvas should cover the top of the wall and hang over at least _________ on the face.

12"

2'

3'

4'

PG 296

Explanation

PG 296

21. The maximum spacing of cleanouts in a solid grouted system shall not exceed _________ inches.

8

24

32

48

PG 209

Explanation

PG 209

22. When applicable, prisms shall be grouted not less than __________, nor more than ___________ after construction of the prism.

6 hours /12 hours

1 day/ 2 days

1 day/ 3 days

2 days/ 3 days

PG 89

Explanation

PG 89

23. 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.

1/5

1/8

1/4

3/8

PG 173

Explanation

PG 173