Prestressed Quiz 1c

(STATIC TEST)

The. test assembly for static tests shall not be less than ____ long between anchorages.

• 3.5 ft

• 2 ft

• 4 ft

• 5.5 ft

Answer explanation

PTI

SPECS 2.5.6

The. test assembly for static tests shall not be less than ____ long between anchorages.

• 3.5 ft

• 2 ft

• 4 ft

• 5.5 ft

Answer explanation

PTI

SPECS 2.5.6

(LIFT OFF PROCEDURES)

When performing a lift off the tendon should never be subjected to a force greater than ______ of MUTS.

• 85%

• 70 %

• 75 %

• 95 %

Answer explanation

PTI

FIELD 9.1.1

(CUTTING OF TENDON TAILS)

Once elongations have been approved by the LDP, TAILS should be cut within _____

• 8 hours

• 1 day

• 12 hrs

• 3 days

Answer explanation

PTI

SPECS 3.11.1

(COMPARE THE MEASURED TO THE CALCULATED ELONGATION)

Elongations for unbounded single strand tendons shall be measured to the nearest ___.

• 1/8 inch

• 1/16 in

• 1/4 in

• 3/8 in

Answer explanation

PTI

FIELD 7.2.3

(TENDON TOLERANCES)

In slabs excess wobble should be avoided, the horizontal tolerance should not exceed...

• 1 inch in 15 feet of tendon length

• 1 in. in 10 ft of tendon length

• 2 in. in 20 ft of tendon length

• 2 in. in 25 ft of tendon length

Answer explanation

PTI

SPECS 3.8.1

(DIMENSIONS & PERMISSIBLE VARIATIONS)

Which of the following statement about A416 7wire tendon is true ?

• The outer wires are smaller in diameter than the center wire.

• stress relieved is the standard type

• A416 tendons come in three grades

• grades are base on minimum yield strength

Answer explanation

ASTM 416

7.2

(COMPARE THE MEASURED TO THE CALCULATED ELONGATIONS)

What is the allowable tolerance for a specified elongation of 9-1/2 inches?

• 5/8 inches

• 1/2 in.

• 3/8 in.

• 3/4 in.

Answer explanation

PTI

FIELD 7.2.3