1. What is the approximate quantity of water in M10?
a) 60L
b) 45L
c) 34L
d) 85L
Explanation: The approximate quantity of water in grade M10 is nearly equal to 34 liters
2. What is concrete maturity?
a) Concrete strength is directly related to age history
b) Concrete strength is indirectly related to age history
c) Concrete strength is directly related to age and its temperature history
d) Concrete strength is indirectly related to age and its temperature history
Explanation: The maturity concept uses the principle that concrete strength is indirectly related to age and its temperature history.
3. Maturity methods provide a ___________ simple approach for strength of concrete.
a) Relatively
b) Technically
c) Absolutely
d) Actually
Explanation: Maturity method provide a relatively simple approach for reliably estimating the in-place early age compressive strength of concrete during construction
4.The maturity method is a ___________ approach to predict the early age strength gain of concrete.
a) Difficult
b) Convenient
c) Inconvenient
d) There is no such method
Explanation: The maturity method is a convenient approach to predict the early age strength gain of concrete, using the principle that the concrete strength is directly related to the hydration temperature history of cementitious paste
5.It is a __________ method.
a) Destructive Testing
b) Nondestructive testing
c) Ring Tension Test
d) Compression Test
Explanation: It is a non-destructive testing method as contrasted to breaking cylinders in the laboratory.
6. It __________ the quantity and ___________ cost of sampling and testing.
a) Increases, Increases
b) Decreases, decreases
c) Increases, Decreases
d) Decreases, Increases
Explanation: It reduces the quantity and cost of sampling and testing by reducing the number of cylinders that need to be cast and broken to determine strength.
7. A lower ratio leads to ___________
a) High strength
b) Low strength
c) Low durability
d) Ease to work
Explanation: A lower ratio leads to higher strength and durability, but may make the mix difficult to work with and form.
8.The material used for UHPC provides compressive strengths up to ___________
a) 17000 psi
b) 20000 psi
c) 25000 psi
d) 29000 psi
Explanation: The material provides compressive strengths up to 29000 pounds per square inch
9. Where the matrix is extremely dense, a weak aggregate may become the weak.
a) True
b) False
Explanation: For very high-strength concrete where the matrix is extremely dense, a weak aggregate may become the weak link in concrete strength.
10.What could be the possible answer among the following for compressive strength of high strength concrete?
a) 10MPa
b) 20MPa
c) 30MPa
d) 40MPa
Explanation: High strength of concrete has the compressive strength greater or equal to 40MPa.