Prestressed Quiz 1b

It is recommended that the support bars for beam tendons are ____ minimum.

• #4

• #3

• #5

• 1/4 in. pencil rod

Answer explanation

PTI

FIELD FIG. 4-8

Stressing pockets shall be filled with non-metallic non-shrink grout within _____ after tendon tail cutting .

• 1 DAY

• 3 days

• 1 week

• 10 days

Answer explanation

PTI FIELD 8.4

PTI SPECS 3.12.2

The minimum weight of the PT coating on the prestressing strand shall not be less than _____ per 100ft. of .5 inch diameter strand.

• 2.5 LBS.

• 2 lbs.

• 3 lbs.

• 3.5 lbs.

Answer explanation

PTI

SPECS 2.2.3

Which of the following statements about A416 7 wire tendons is true?

• Low relaxation is the standard type

• the outer wires are larger in diameter than the center wire.

• stress relieved is the standard type

• A416 tendons come in threes grades

Answer explanation

ASTM A416

1.1

When stressing tendons on a post-tensioned slab the electric extension cord should be....

• 3- wire, 12 gauge & not over 100 ft.

• 2 wire, 10 gauge and not over 150 ft.

• 3 wire, 14 gauge and not less than 100 ft.

• 3 wire, 12 not less than 150 ft.

Answer explanation

PTI

FIELD 6.3.10 G

Measured elongation tolerance should be within ⁺_- ____ of the calculated elongations.

• 7 %

• 5%

• 3%

• 2%

Answer explanation

PTI

FIELD 7.2.3

Hairpins are required at the anchorage zone when there are ___ or more consecutive anchors spaced at 12 inches or less.

• 6

• 5

• 8

• 10

Answer explanation

PTI

FIELD 4.4.14

If variations between the calculated and actual elongations consistently exceed the allowable tolerance...

• Stressing should cease until the cause is determined

• stepping should be completed & elongations submitted to the engineer of record

• gauge reading should be adjusted to achieve elongations within tolerance.

• special inspector should adjust the elongations on the stressing sheets to be within tolerance

Answer explanation

PTI

FIELD 7.2.3

The test assembly for static tests shall be less than ____ long between anchorages.

• 3.5 FEET

• 2 feet

• 4 feet

• 5.5 feet

Answer explanation

PTI

SPECS. 2.5.6