## Prestressed Concrete Structures MCQ Set 1

1. The design values of the resistance must equal or exceed the sum of:

a) Design deflection

b) Design loads

c) Design bars

d) Design cross section

### View Answer

2. The design strength of the material being known, the problem generally reduces to the determination of:

a) Dimensions

b) Displacements

c) Parameters

d) Length

### View Answer

3. The trial and error method of assuming a certain section and checking its resistance is often:

a) Easy method

b) Time consuming

c) Reverse method

d) Direct method

### View Answer

4. A direct method for computing the leading dimensions of a section is often feasible as in the case of:

a) Pure flexure

b) Partial flexure

c) Total flexure

d) Unpure flexure

### View Answer

5. In the case of flanged member on the basis of collapse the width and depth of the compression flange is:

a) Constant

b) Zero

c) Fixed

d) Increased

### View Answer

6. The minimum prestressing force required and the corresponding eccentricity are controlled by the serviceability limit states at which the stresses are not to exceed the:

a) Permissible values

b) Constant

c) Zero

d) Limited values

### View Answer

7. The limit states of deflection rarely influence the design of prestressed members:

a) Class 4

b) Class 3

c) Class 1 and 2

d) Class 5

### View Answer

8. In case of member subjected to axial tension, the concrete section and the minimum prestress are mainly controlled by:

a) Permissible stress

b) Transverse stress

c) Strain

d) Principle stress

### View Answer

9. The dimensioning of prestressed members subjected to axial load and bending is governed by:

a) Permissible stresses

b) Neglected stresses

c) Allowable stresses

d) Ranged stresses

### View Answer

10. The required cross sectional dimensions and the prestress may be determined by solving:

a) Stress conditions equations

b) Multiple equations

c) Single equations

d) Unique equations

### View Answer

## Prestressed Concrete Structures MCQ Set 2

1. The primary aim of structural optimization is to determine the:

a) Design variables

b) Design parameters

c) Design constants

d) Design limits

### View Answer

2. The process of optimum design of prestressed concrete structures may be looked as:

a) Computer programming problem

b) Mathematical programming problem

c) Diagram

d) Algorithm

### View Answer

3. The optimization problem involves:

a) Short computations

b) Zero computations

c) Long computations

d) Span computations

### View Answer

4. The design variables are generally grouped under which parameters:

a) Dimensional variables

b) Span variables

c) Foundation variables

d) Constant variables

### View Answer

5. In the sequential unconstrained minimization techniques, which problems are converted?

a) Un constrained

b) Constrained

c) Designed

d) Linked

### View Answer

6. In sequential linear programming, the non-linear objective functions and constrains are:

a) Linearized

b) Parralized

c) Straightened

d) Divided

### View Answer

7. The further improvement method of sequential linear programming is:

a) Beam limit method

b) Rise limit method

c) Move limit method

d) Fall limit method

### View Answer

8. Dynamic programming developed in optimization techniques are widely applied in:

a) Research

b) Structures

c) Entertainment

d) Mathematics

### View Answer

9. The limitation of dynamic programming is that it does not lend itself for:

a) Construction general purpose computer programmes

b) Machine design

c) Graphic design

d) Architectural design

### View Answer

10. In geometric programming, the emphasis is on:

a) Optimal distribution

b) Single distribution

c) Variable distribution

d) Linear distribution

### View Answer

## Prestressed Concrete Structures MCQ Set 3

1. The prestressed concrete structures pressure vessels can be triaxially prestressed resulting in:

a) Reflection

b) High load factors

c) Tensile factors

d) Ductile factors

### View Answer

2. One of the nuclear power station located in Tamilnadu shielded by a double containment system is:

a) Lankesh nuclear power station

b) Gauri nuclear power station

c) Kalpakkam nuclear power station

d) Radant nuclear power station

### View Answer

3. The maximum credible accident (MCA) is a:

a) Nuclear containment structures

b) Explosive container

c) Hydrogen container

d) Mica container

### View Answer

4. The atomic power reactor at Rajasthan was built in:

a) 1900

b) 1935

c) 1965

d) 1340

### View Answer

5. One of the prestressed power reactor vessels in the following is:

a) Madras

b) Assam

c) Tripura

d) Jharkhand

### View Answer

6. The prestressing system of the dome in madras power atomic reactor vessel comprises of how many brands?

a) 4

b) 3

c) 2

d) 1

### View Answer

7. The Narora atomic power plant consists of a:

a) Single containment vessel

b) Triple containment

c) Prestressed containment vessel

d) Double containment vessel

### View Answer

8. The prestressed concrete silos are generally preferred for storage of:

a) Blocks

b) Anchors

c) Fertilizers

d) Concrete

### View Answer

9. The thickness of concrete in the shell is in the range:

a) 60-70mm

b) 50-75mm

c) 90-120mm

d) 40-50mm

### View Answer

10. The economical concrete silos shape is:

a) Paraboloid shell shape

b) Ellipse shell shape

c) Circle shell shape

d) Dome shell shape

### View Answer

## Prestressed Concrete Structures MCQ Set 4

1. The resultant stresses in concrete at any section are obtained by the effect of:

a) Prestress and flexural stresses

b) Prestress and bending stresses

c) Prestress and shear stresses

d) Prestress and torsion stresses

### View Answer

2. The resultant stress distribution due to eccentric prestressing, dead and live loads at any given section are obtained as:

a) F_{sup} = (p/a-p_{e}/z_{t})+(m_{g}/z_{t})+(m_{q}/z_{t})

b) F_{sup} = (p/a-p_{e}/z_{t})+(m_{g}/z_{t})+(m_{q}/z_{t})

c) F_{sup} = (p/a-p_{e}/z_{t})+(m_{g}/z_{t})+(m_{q}/z_{t})

d) F_{sup} = (p/a-p_{e}/z_{t})+(m_{g}/z_{t})+(m_{q}/z_{t})

### View Answer

_{q}and M

_{g}are live loads and dead load moments at the central span section; M

_{q}=ql

^{2}/8 M

_{g}=gl

^{2}/8

3. A concrete beam of rectangular section, 250mm wide and 600mm deep. Calculate the bending moment that can be applied without applying tension at the soffit of the beam with given m/z value as 5.74?

a) 26.4

b) 54.8

c) 34.5

d) 86.1

### View Answer

^{2}/6) = 15×10

^{6}mm

^{3}, M = (5.74×15×10

^{6}) = 86.1×10

^{6}nmm = 86.1knm.

4. A prestressed concrete beam of section 200mm wide by 300mm deep of imposed load 4kn/m at a span of 6m, density of concrete is 24kn/m^{3}. Find the concentric prestressing force necessary for zero fiber stress at the soffit?

a) 490

b) 560

c) 230

d) 310

### View Answer

^{4}mm

^{2}, g = (0.2×0.3×24), M

_{g}= (0.125×1.44×62) = 6.48knm, M

_{q}= (0.125×4×62) = 18knm, Z

_{b}=Z

_{t}= (200×3002/6) = 3×10

^{6}mm

^{3}P/A = 8.16, P = (8.16×6×10

^{4}) = 489.6kn.

5. The locus of the points of application of resultant force in any structure is termed as:

a) Pressure line

b) Hollow line

c) Beam line

d) Tendon line

### View Answer

6. The concept of pressure line is very useful in understanding the concept of:

a) Load carrying mechanism

b) Bending mechanism

c) Shear mechanism

d) Torsion mechanism

### View Answer

7. The location of the pressure line depends upon:

a) Breakage and Bondage

b) Magnitude and direction

c) Shear and Torsion

d) Pressure and equilibrium

### View Answer

8. The eccentricity e in the pressure line diagram is:

a) h/16

b) h/12

c) h/15

d) h/8

### View Answer

9. The change in the external moments in the elastic range of prestressed concrete beam results in:

a) Bending moment in pressure line

b) Torsion in pressure line

c) Flexure in pressure line

d) Shift of the pressure line

### View Answer

10. The shift of pressure line measured from centroidal axis is obtained as:

a) (m/p)-e

b) (m/q)-e

c) (m/r)-e

d) (m/i)-e

### View Answer

## Prestressed Concrete Structures MCQ Set 5

1. The computation of ultimate flexural strength of under and over reinforced sections, as well as of sections is provided by

a) Indian code

b) British code

c) American code

d) France code

### View Answer

2. The strain compatibility method of analysis, involves the use of:

a) Tension compression curves

b) Stress strain curves

c) Bending bondage

d) Elasticity curve

### View Answer

3. The current Indian, British and American codes have more or less similar provisions for the computation of:

a) Shear strength

b) Shear stress

c) Shear strain

d) Shear principle

### View Answer

4. The primary serviceability limit state corresponds to excessive:

a) Compression and tension

b) Deflection and cracking

c) Shear and Friction

d) Torsion and mass

### View Answer

5. The permissible deflections vary from a maximum of:

a) Span/180

b) Span/100

c) Span/160

d) Span/40

### View Answer

6. The short term deflections of prestressed members of class-1 and class-2 types under service loads are influenced by:

a) Length of prestressing force

b) Depth of prestressing force

c) Magnitude of prestressing force

d) Eccentricity of prestressing force

### View Answer

7. The limit state of cracking is important in the case of:

a) Partially prestressed members

b) Fully prestressed members

c) Tangential prestressed members

d) Hollow prestressed members

### View Answer

8. The Class 1-type members are preferred for:

a) Block structures

b) Containment structures

c) Cracked structures

d) Aged structures

### View Answer

9. In class 2 structures limited tensile stresses of magnitude not exceeding the modulus of rupture of concrete are permitted under:

a) Tensile loads

b) Compressive loads

c) Principle loads

d) Working loads

### View Answer

10. Which type of class structure is considered as econimal?

a) Class-1

b) Class-2

c) Class-3

d) Class-4