# Practice Test: Question Set - 05

**1. A pre-stressed rectangular beam which carries two concentrated loads**

*W*at*L*/3 from either end, is provided with a bent tendon with tension*P*such that central one-third portion of the tendon remains parallel to the longitudinal axis, the maximum dip*h*is- (A)

*WL*/

*P*

- (B)

*WL*/2

*P*

- (C)

*WL*/3

*P*

- (D)

*WL*/4

*P*

**2. The minimum head room over a stair must be**

- (A) 200 cm

- (B) 205 cm

- (C) 210 cm

- (D) 230 cm

**3. If**

*q*is the punching shear resistance per unit area*a*, is the side of a square footing for a column of side*b*, carrying a weight*W*including the weight of the footing, the depth (*D*) of the footing from punching shear consideration, is- (A)

*D*=

*W*(

*a*-

*b*)/4

*a*²

*bq*

- (B)

*D*=

*W*(

*a*² -

*b*²)/4

*a*²

*bq*

- (C)

*D*=

*W*(

*a*² -

*b*²)/8

*a²bq*

- (D)

*D*=

*W*(

*a*² -

*b*²)/4

*abq*

**4. For initial estimate for a beam design, the width is assumed**

- (A) 1/15th of
span

- (B) 1/20th of
span

- (C) 1/25th of
span

- (D) 1/30th of
span

**5. In a slab, the pitch of the main reinforcement should not exceed its effective depth**

- (A) Three
times

- (B) Four
times

- (C) Five
times

- (D) Two times

**6. If the length of a combined footing for two columns**

*l*meters apart is*L*and the projection on the left side of the exterior column is*x*, then the projection*y*on the right side of the exterior column, in order to have a uniformly distributed load, is (where x̅*is the distance of centre of gravity of column loads).*- (A)

*y = L - (l*- x̅)

- (B)

*y = L*/2

*+*

*(*

*l*- x̅)

- (C)

*y = L*/2

*-*

*(*

*l*+ x̅)

- (D)

*y = L*/2

*-*

*(*

*l*- x̅)

**7. Total pressure on the vertical face of a retaining wall of height**

*h*acts parallel to free surface and from the base at a distance of- (A)

*h*/4

- (B)

*h*/3

- (C)

*h*/2

- (D) 2

*h*/3

**8. If the tendon is placed at an eccentricity**

*e*below the centroidal axis of the longitudinal axis of a rectangular beam (sectional modulus*Z*and stressed load*P*in tendon) the stress at the extreme top edge- (A) Is increased
by

*PZ*/

*e*

- (B) Is increased
by

*Pe*/

*Z*

- (C) Is decreased
by

*Pe*/

*Z*

- (D) Remains
unchanged

**9. The Young's modulus of elasticity of steel, is**

- (A) 150
KN/mm

^{2}

- (B) 200 KN/mm

^{2}

- (C) 250
KN/mm

^{2}

- (D) 275 KN/mm

^{2}

**10. Design of a two way slab simply supported on edges and having no provision to prevent the corners from lifting, is made by**

- (A) Rankine
formula

- (B) Marcus
formula

- (C) Rankine
Grashoff formula

- (D) Grashoff
formula

**11. Spacing of stirrups in a rectangular beam, is**

- (A) Kept
constant throughout the length

- (B) Decreased
towards the centre of the beam

- (C) Increased at
the ends

- (D) Increased
at the centre of the beam

**12. As per IS : 456, the reinforcement in a column should not be less than**

- (A) 0.5% and not
more than 5% of cross-sectional area

- (B) 0.6%
and not more than 6% of cross-sectional area

- (C) 0.7% and not
more than 7% of cross-sectional area

- (D) 0.8%
and not more than 8% of cross-sectional area

**13. Bottom bars under the columns are extended into the interior of the footing slab to a distance greater than**

- (A) 42
diameters from the centre of the column

- (B) 42
diameters from the inner edge of the column

- (C) 42
diameters from the outer edge of the column

- (D) 24
diameters from the centre of the column

**14. The allowable tensile stress in mild steel stirrups, reinforced cement concrete, is**

- (A) 1400 kg/cm

^{2}

- (B) 190 kg/cm

^{2}

- (C) 260 kg/cm

^{2}

- (D) 230
kg/cm

^{2}

**15. Pick up the assumption for the design of a pre-stressed concrete member from the following:**

- (A) A
transverse plane section remains a plane after bending

- (B) During
deformation limits, Hook's law is equally applicable to concrete as well as to
steel

- (C) Variation
of stress in reinforcement due to changes in external loading is negligible

- (D) All the
above

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