Top 250+ Solved Concrete Technology MCQ Questions Answer
Q. Which of following proportion of different ingredient of concrete mix confirm to the arbitrary mothod of mixing?
a. 1 ; 2 ; 5
b. 1 ; 3 : 7
c. 1 : 4 ; 8
d. 1 : 5 ; 9
Q. The levelling operation that removes humps and hollows and give a true, uniform concrete surface is called
a. screeding
b. floating
c. trowelling
d. compacting
Q. The apparent specific gravity of an aggregate is defined as
a. the weight of oven dry aggregate divided by its absolute volume, excluding the natural pores in the aggregate particles
b. the weight of oven dry aggregate divided by its absolute volume, including the natural pores in the aggregate particles
c. the weight of aggregate required to fill a container of unit volume
d. the difference in weight of the aggregate in saturated surface dry condition and in moist condition
Q. In concrete walls, construction joints should be provided at the
a. floor level
b. soffit level of lintels
c. sill level of windows
d. all of these
Q. According to IS : 383 - 1970, a good a aggregate for concrete construction should be
a. chemically inert
b. sufficiently strong
c. sufficiently hard and durable
d. all of these
Q. The sum of the percentage of tricalcium silicate and dicalcium silicate for Portland cement varies from
a. 50 to 60%
b. 60 to 70%
c. 70 to 80%
d. 80 to 90%
Q. The percentage of water for making a cement paste of normal consistency varies from
a. 15 to 25%
b. 25 to 35%
c. 35 to 50%
d. 50 to 60%
Q. Rapid hardening cement is used
a. where high early strength is desired
b. where form work is to be removed as early as possible
c. for constructing road pavements
d. all of the above
Q. Which of the following statement is correct while compacting concrete with vibrators?
a. The vibrator should be inserted horizontally.
b. The vibrator should not be immersed through a full depth of freshly laid concrete.
c. The vibrator should not touch the form surface.
d. all of the above
Q. The slump test of concrete is used to mesure its
a. consistency
b. mobility
c. homogeneity
d. all of these
Q. The importance of storing the various ingredients of concrete is
a. to maintain the uniformity of grading
b. to maintain the uniformity of moisture
c. to maintain the strength of materials
d. both (a) and (b)
Q. The resistance of an aggregate to wear is known as
a. shear value
b. crushing value
c. abrasion value
d. impact value