Explore topic-wise MCQs in Prestressed Concrete Structures.

This section includes 19 Mcqs, each offering curated multiple-choice questions to sharpen your Prestressed Concrete Structures knowledge and support exam preparation. Choose a topic below to get started.

1.

Estimate the transmission length at the ends of a pretensioned beam prestressed by 7mm diameter wires. Assume the cube strength of concrete at transfer as 42n/mm2 (adopt empirical method)?

A. 550mm
B. 610mm
C. 420mm
D. ?a) 550mmb) 610mmc) 420mmd) 210mm
Answer» C. 420mm
Discussion
2.

According to Ros, the transmission length of smooth round wires of 1.5-5mm diameter varies approximately from __________

A. 1500-600
B. 100-300
C. 200-100
D. 1100-800
Answer» C. 200-100
Discussion
3.

The Shear bonding is obtained by cold rolling of __________

A. Square indentations
B. Rectangle indentations
C. Elliptical indentations
D. Circular indentations
Answer» D. Circular indentations
Discussion
4.

The surface of drawn round wires is roughened by __________

A. Pickling
B. Bending
C. Bonding
D. Tensioning
Answer» B. Bending
Discussion
5.

The transmission length prevailing at the time of transfer does not remain __________

A. Zero
B. Constant
C. Without reaction
D. With reaction
Answer» C. Without reaction
Discussion
6.

The transmission length is predicted considering the equation parameters varying from __________

A. 90 to 150ϕ
B. 100 to 200ϕ
C. 80 to 160ϕ
D. 20 to 60ϕ
Answer» D. 20 to 60ϕ
Discussion
7.

The expression for transmission length based on wedge action is given as?

A. Lt = ϕ/2μ (1+μc) (αc/μs-fpi/Ec) (fpe/2fpi-fpe)
B. Lt = ϕ/2μ (1+μc) (αc/μs-fpi/Ec)c) Lt = ϕ/2μ (1+μ
C. (αc/μs-fpi/Ec) (fpe/2fpi-fpe)b) Lt = ϕ/2μ (1+μc) (αc/μs-fpi/Ec)c) Lt = ϕ/2μ (1+μc)
D. Lt = ϕ/2μ
E. Lt = ϕ/2μ (1+μc) (αc/μs-fpi/Ec)c) Lt = ϕ/2μ (1+μc)d) Lt = ϕ/2μ
Answer» B. Lt = ϕ/2μ (1+μc) (αc/μs-fpi/Ec)c) Lt = ϕ/2μ (1+μ
Discussion
8.

The transmission length mainly depends up on how many factors?

A. 8
B. 4
C. 2
D. 12
Answer» C. 2
Discussion
9.

The transmission length required to attain uniform stress distribution in prestress member is acquired through __________

A. Zero bond stress
B. Middle bond stress
C. Safe bond stress
D. Edge bond stress
Answer» B. Middle bond stress
Discussion
10.

ESTIMATE_THE_TRANSMISSION_LENGTH_AT_THE_ENDS_OF_A_PRETENSIONED_BEAM_PRESTRESSED_BY_7MM_DIAMETER_WIRES._ASSUME_THE_CUBE_STRENGTH_OF_CONCRETE_AT_TRANSFER_AS_42N/MM2_(ADOPT_EMPIRICAL_METHOD)??$

A. 550mm
B. 610mm
C. 420mm
D. 210mm
Answer» C. 420mm
Discussion
11.

According to Ros, the transmission length of smooth round wires of 1.5-5mm diameter varies approximately from?

A. 1500-600
B. 100-300
C. 200-100
D. 1100-800
Answer» C. 200-100
Discussion
12.

The Shear bonding is obtained by cold rolling of:

A. Square indentations
B. Rectangle indentations
C. Elliptical indentations
D. Circular indentations
Answer» D. Circular indentations
Discussion
13.

The surface of drawn round wires is roughened by:

A. Pickling
B. Bending
C. Bonding
D. Tensioning
Answer» B. Bending
Discussion
14.

The transmission length prevailing at the time of transfer does not remain:

A. Zero
B. Constant
C. Without reaction
D. With reaction
Answer» C. Without reaction
Discussion
15.

Which one of the empirical formula is used for predicting transmission length?

A. L<sub>t</sub> = ((f<sub>cu</sub>)<sup>1/2</sup> x 10<sup>3</sup>/β)<sup>1/2</sup>
B. L<sub>t</sub> = ((f<sub>cu</sub>)<sup>1/2</sup> x 10<sup>3</sup>/β)
C. L<sub>t</sub> = (f<sub>cu</sub>)<sup>1/2</sup> x 10<sup>3</sup>
D. L<sub>t</sub> = (f<sub>cu</sub>)<sup>1/2</sup>
Answer» B. L<sub>t</sub> = ((f<sub>cu</sub>)<sup>1/2</sup> x 10<sup>3</sup>/‚âà√≠‚Äö√¢¬ß)
Discussion
16.

The transmission length is predicted considering the equation parameters varying from:

A. 90 to 150ϕ
B. 100 to 200ϕ
C. 80 to 160ϕ
D. 20 to 60ϕ
Answer» D. 20 to 60‚âà√¨‚àö√ò
Discussion
17.

The expression for transmission length based on wedge action is given as:

A. L<sub>t</sub> = ϕ/2μ (1+μ<sub>c</sub>) (α<sub>c</sub>/μ<sub>s</sub>-f<sub>pi</sub>/E<sub>c</sub>) (f<sub>pe</sub>/2f<sub>pi</sub>-f<sub>pe</sub>)
B. L<sub>t </sub>= ϕ/2μ (1+μ<sub>c</sub>) (α<sub>c</sub>/μ<sub>s</sub>-f<sub>pi</sub>/E<sub>c</sub>)
C. L<sub>t</sub> = ϕ/2μ (1+μ<sub>c</sub>)
D. L<sub>t</sub> = ϕ/2μ
Answer» B. L<sub>t </sub>= ‚âà√¨‚àö√ò/2‚âà√≠¬¨‚à´ (1+‚âà√≠¬¨‚à´<sub>c</sub>) (‚âà√≠¬¨¬±<sub>c</sub>/‚âà√≠¬¨‚à´<sub>s</sub>-f<sub>pi</sub>/E<sub>c</sub>)
Discussion
18.

The transmission length mainly depends up on how many factors:

A. 8
B. 4
C. 2
D. 12
Answer» C. 2
Discussion
19.

The transmission length required to attain uniform stress distribution in prestress member is acquired through:

A. Zero bond stress
B. Middle bond stress
C. Safe bond stress
D. Edge bond stress
Answer» B. Middle bond stress
Discussion