**Q.1) Air entrainment in concrete increases –**

A) Workability

B) Strength

C) Effects of temperature variation

D) Unit weight

**Option (A)**

**Q.2) For a reinforced concrete section, the shape of shear stress diagram is –**

A) Wholly parabolic

B) Wholly rectangular

C) Parabolic above neutral axis and rectangular below neutral axis

D) Rectangular above neutral axis and parallel below neutral axis

**Option (C)**

**Q.3) For walls, columns and vertical faces of all structural members, the form work is generally removed after :**

A) 24 – 48 Hrs

B) 3 days

C) 7 days

D) 14 days

**Option (A)**

**Q.4) Lap length in compression shall not be less than (φ = diameter of bar) –**

A) 15 φ

B) 20 φ

C) 24 φ

D) 30 φ

**Option (C)**

**Q.5) As per IS:456-2000, the maximum reinforcement in a column is –**

A) 2 %

B) 4 %

C) 6 %

D) 8 %

**Option (C)**

**Q.6) Critical section for shear in case of flat slabs is at a distance of –**

A) Effective depth of slab from periphery of column/drop panel

B) d/2 from periphery of column/capital/drop panel

C) At the drop panel of slab

D) At the periphery of column

**Option (B)**

**Option (B)**

**Q.8) The average permissible stress in bond for plain bars in tension is –**

A) Increased by 10% for bars in compression

B) Increased by 25% for bars in compression

C) Decreased by 10% for bars in compression

D) Decreased by 25% for bars in compression

**Option (B)**

**Q.9) The main reason for providing number of reinforcing bars at a support in a simply supported beam is to resist in that zone –**

A) Compressive stress

B) Shear stress

C) Bond stress

D) Tensile stress

**Option (C)**

**Q.10) The minimum cover to the ties or spirals should not be less than –**

A) 15 mm

B) 20 mm

C) 25 mm

D) 50 mm

**Option (C)**

**Q.11) The load-carrying capacity of a helically reinforced column as compared to that of a tied column is about –**

A) 5% less

B) 10% less

C) 5% more

D) 10% more

**Option (C)**

**Q.12) Due to circumferential action of the spiral in a spirally reinforced column –**

A) Capacity of column is decreased

B) Ductility of column reduces

C) Capacity of column is decreased but ductility of column increases

D) Both the capacity of column and ductility of column increase

**Option (D)**

**Q.13) In counterfort retaining walls, the main reinforcement in the stem at support is –**

A) Not provided

B) Provided only in inner face

C) Provided only on front face

D) Provided both on inner and front faces

**Option (B)**

**Q.14) To minimize the effect of differential settlement, the area of a footing should be designed for –**

A) Dead Load only

B) Dead Load + Live Load

C) Dead Load + Fraction of Live Load

D) Live Load + fraction of Dead Load

**Option (C)**

**Q.15) The centroid of compressive force, from the extreme compression fibre in limit state design lies at a distance of –**

A) 0.367x_{u}

B) 0.416x_{u}

C) 0.446x_{u}

D) 0.573x_{u}

**Option (B)**

**Q.16) For bars in tension, a standard hook has an anchorage value equivalent to a straight length of –**

A) 8φ

B) 12φ

C) 16φ

D) 24φ

**Option (C)**

**Q.17) Due to shrinkage stresses, a simply supported beam having reinforcement only at bottom tends to –**

A) Deflect downward

B) Deflect upward

C) Deflect downward or upward

D) None of the above

**Option (A)**

**Q.18) In a spherical dome the hoop stress due to a concentrated load at crown is –**

A) Compressive everywhere

B) Tensile everywhere

C) Partly compressive and Partly Tensile

D) Zero

**Option (B)**

**Q.19) Which of the following losses of prestress occurs only in pre-tensioning and not in post-tensioning?**

A) Elastic shortening of concrete

B) Shrinkage of concrete

C) Creep of concrete

D) Loss due to friction

**Option (A)**

**Q.20) In concrete, use of angular crushed aggregate in place of natural rounded gravel affects –**

A) Direct tensile strength

B) Split tensile strength

C) Flexural tensile strength

D) Compressive strength

**Option (C)**