Top 250+ Solved Concrete Technology MCQ Questions Answer
Q. The mixer, which produces a steady stream of concrete as long as it is in operation, is known as
a. non-tilling batch mixer
b. tilting type batch mixer
c. continuous mixer
d. none of these
Q. The cement concrete, from which entrained air and excess water are removed after placing it in position, is called
a. vacuum concrete
b. light weight concrete
c. prestressed concrete
d. sawdust concrete
Q. Which of the following statement is wrong?
a. If the height of pile exceeds 1.44 m, the cement bags should be arranged in header and stretcher fashion.
b. The cement bags should be rolled on the floor when it is taken out for use.
c. The strength of cement decreases with the passage of time.
d. none of the above
Q. In the slump test, the maximum size of the aggregate should not exceed 38 mm.
a. Correct
b. Incorrect
Q. The resistance of an aggregate to sudden compressive forces is called impact value.
a. Correct
b. Incorrect
Q. The controlled concrete is used for
a. one grade of concrete mix
b. three grades of concrete mix
c. five grades of concrete mix
d. all the seven grades of concrete mix
Q. The admixtures are added in concrete to
a. accelerate the rate of setting and hardening of cement
b. make the concrete water proof, acid proof etc.
c. reduce the bleeding and segregation of concrete mix
d. all of the above
Q. The aggregate is said to be elongated when
a. its least dimension is three-fifth of its mean dimension
b. its least dimension is equal to its mean dimension
c. its length is equal to its mean dimension
d. its length is equal to 1.8 times its mean dimension
Q. The cement, widely used in retaining walls, is
a. rapid hardening cement
b. low heat cement
c. sulphate resisting cement
d. ordinary Portland cement