1. _________ cement content to avoid shrinkage cracking due to temperature cycle in mass concrete.
a) Minimum
b) Nominal
c) .5
d) Maximum
Explanation: Maximum cement content to avoid shrinkage cracking due to the temperature cycle in mass concrete. It gives adequate durability for the particular site condition.
2. What is the approx. mix proportion for M15?
a) 1:3:6
b) 1:2:4
c) 1:1.5:3
d) 1:1:2
Explanation: According to IS 456-2000 code, the approximate value of mix proportion for grade M15 is 1:2:4.
3. What is the approx. mix proportion for M20?
a) 1:3:6
b) 1:2:4
c) 1:1.5:3
d) 1:1:2
Explanation: According to IS 456-2000 code, the approximate value of mix proportion for grade M20 is 1:1.5:3.
4. Depending on the degree of workability and placing condition determine the ___________
a) Slump value
b) The maximum size of aggregate
c) The amount of mixing water
d) The minimum water-cement ratio
Explanation: The slump value is depended on the degree of workability and placing condition.
5. Depending on the economical availability and dimensions of the structure determine the _____________
a) Slump value
b) The maximum size of aggregate
c) The amount of mixing water
d) The minimum water-cement ratio
Explanation: The value for the maximum size of aggregate depends on the economical availability and dimensions of the structure determine.
6. Determine the _______ either from strength considerations or from durability considerations.
a) Slump value
b) The maximum size of aggregate
c) The amount of mixing water
d) The minimum water-cement ratio
Explanation: Determine the minimum water-cement ratio either from strength considerations or from durability considerations.
7. Determine the amount of cement per unit volume of concrete from ______________
a) Slump value
b) The maximum size of aggregate
c) The amount of mixing water
d) The maximum size of aggregate and the amount of mixing water
Explanation: Determine the amount of cement per unit volume of concrete from the maximum size of aggregate and the amount of mixing water
8. This cement content should ________ the cement content required based on durability criteria.
a) Be more than
b) Be equal to
c) Be less than
d) Not be less than
Explanation: This cement content should not be less than the cement content required based on durability criteria.
9. The aim of the designer should always be to get concrete mixtures of optimum strength at _________ cement content and ________ workability.
a) Maximum, Nonacceptable
b) Minimum, Nonacceptable
c) Maximum, acceptable
d) Minimum, acceptable
Explanation: The aim of the designer should always be to get concrete mixtures of optimum strength at minimum cement content and acceptable workability.
10. Maximum size of aggregates should not be larger than ___________
a) 1/5 the minimum dimension of structural members
b) 1/4 the minimum dimension of structural members
c) 1/3 the minimum dimension of structural members
d) 1/6 the minimum dimension of structural members
Explanation: Maximum size of aggregates should not be larger than 1/5 the minimum dimension of structural members.