**1. The maximum compressive strain permitted in R.C.C. columns at failure load is _____.**

[A] 0.002

[B] 0.003

[C] 0.035

[D] 0.004

**Answer: Option A**

**2. In working stress design, if the modular ratio is ‘m’, steel ratio is ‘r’, the critical neutral axis constant ‘k’ is given by _____.**

[A] m/m-r

[B] m/m+r

[C] m+r/m

[D] m-r/m

**Answer: Option B**

**3. Modular ratio (m) for concrete can be calculated as _____.**

[A] 250/σ_{cbc}

[B] 280/σ_{cbc}

[C] 280/σ_{cbc}

[D] 250/σ_{cbc}

**Answer: Option B**

**4. In limit state design, partial safety factors are applied to _____.**

[A] Loads

[B] Material stresses

[C] Both loads and material stresses

[D] Size of structural member

**Answer: Option C**

**5. Brass cannot be used as reinforcement in concrete because _____.**

[A] Its density is greater than concrete

[B] It density is smaller than iron

[C] It is very expensive

[D] Its coefficient of thermal expansion is higher than concrete

**Answer: Option D**