Increase in the moisture content in concrete_________________?

Related Mcqs:

1. Bulking of sand is maximum if moisture content is about____________?

   A. 2 %
   B. 4%
   C. 6%
   D. 10%

2. High carbon content in the steel causes_______________?

   A. decrease in tensile strength but increase in ductility
   B. increase in tensile strength but decrease in ductility
   C. decrease in both tensile strength and ductility
   D. increase in both tensile strength and ductility

3. If the storey height is equal to length of RCC wall, the percentage increase in strength is_____________?

   A. 0
   B. 10
   C. 20
   D. 30

4. Approximate value of shrinkage strain in concrete, is________________?

   A. 0.003
   B. 0.0003
   C. 0.00003
   D. 0.03

5. As compared to ordinary portland cement, high alumina cement has______________?

   A. higher initial setting time but lower final setting time
   B. lower initial setting time but higher final setting time
   C. higher initial and final setting times
   D. lower initial and final setting times

6. For concreting of heavily reinforced sections without vibration, the workability of concrete expressed as compacting factor should be________________?

   A. 0.75-0.80
   B. 0.80-0.85
   C. 0.85 – 0.92
   D. above 0.92

7. Which of the following statements is incorrect ?

   A. Minimum cross sectional area of longitudinal reinforcement in a column is 0.8%
   B. Spacing of longitudinal bars measured along the periphery of column should not exceed 300 mm
   C. Reinforcing bars in a column should not be less than 12 mm in diameter
   D. The number of longitudinal bars provided in a circular column should not be less than four

8. Half of the main steel in a simply supported slab is bent up near the support at a distance of x from the center of slab bearing where x is equal to________________?

   A. 1/3
   B. 1/5
   C. 1/7
   D. 1/10
   where 1 is the span

9. If nominal shear stress tv exceeds the design shear strength of concrete xc, the nominal shear reinforcement as per IS : 456-1978 shall be provided for carrying a shear stress equal to__________________?

   A. xv
   B. xc
   C. xv – TC
   D. Tv + Tc

10. Most common method of prestressing used for factory production is________________?

    A. Long line method
    B. Freyssinet system
    C. Magnel-Blaton system
    D. Lee-Macall system