POST-TENSIONING INSTITUTE (PTI) | ALL
QUESTIONS AND CORRECT ANSWERS | VERIFIED
ANSWERS
1. According to PTI Specifications, what is the allowable tolerance for
the measurement of elongations in an elevated (structural) slab?
a. ±5%
b. ±7%
c. ±10%
d. It doesn't matter as long as the tendons were stressed to the correct
gauge pressure. ---------CORRECT ANSWER-----------------b. ±7%
2. The recommended space, "Y" between tendon bundles in a beam is.
a. 4in.
b. 1.5 in.
c. 1 in.
d. 0.5. ---------CORRECT ANSWER-----------------b. 1.5 in.
,3. What is the minimum number of integrity tendons required in each
direction over columns in a flat slab?
a. One
b. Two
c. Three
d. There is no minimum requirement. ---------CORRECT ANSWER-----------
------b. Two
4. In an encapsulated system, how much bare strands is acceptable
behind stressing anchorage?
a. None
b. ½" maximum
c. 6" maximum
d. It does not matter. ---------CORRECT ANSWER-----------------a. None
5. Longitudinal cracking of wedges may occur and is acceptable as a
result of wedges moving to their final wedge set position.
, a. True
b. False ---------CORRECT ANSWER-----------------a. True
6. What should be done when the beam stirrup spacing does not match
the PT support bar spacing?
a. Move the support bar to the nearest stirrup location and adjust the
vertical height so that a smooth tendon profile is maintained, add
additional support bars at other stirrup locations if needed so a
maximum allowable support spacing is not exceeded.
b. Change the spacing of the beam stirrup to match the support bar
spacing.
c. Do not proceed with installation until further instructions are
received.
d. None of the above. ---------CORRECT ANSWER-----------------a. Move
the support bar to the nearest stirrup location and adjust the vertical
height so that a smooth tendon profile is maintained, add additional
support bars at other stirrup locations if needed so a maximum
allowable support spacing is not exceeded.
7. When installing tendons in a narrow joist: