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Dear candidates you will find MCQ questions of Concrete Technology here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.

M

Mr. Dubey • 51.32K Points
Coach

Q. 281) The impact value of an aggregate is generally used as an alternative to its crushing value, to know the quality of aggregate.

(A) Yes
(B) No
(C) ---
(D) ---
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M

Mr. Dubey • 51.32K Points
Coach

Q. 282) The workability of concrete is expressed by

(A) water-cement ratio
(B) slump value
(C) compaction factor
(D) both (a) and (b)
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M

Mr. Dubey • 51.32K Points
Coach

Q. 283) 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%
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M

Mr. Dubey • 51.32K Points
Coach

Q. 284) 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%
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M

Mr. Dubey • 51.32K Points
Coach

Q. 285) Vertical sides of columns may be stripped after

(A) 1 to 2 days
(B) 7 days
(C) 14 days
(D) 21 days
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M

Mr. Dubey • 51.32K Points
Coach

Q. 286) 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
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M

Mr. Dubey • 51.32K Points
Coach

Q. 287) If 30% excess water is added, the strength of concrete is reduced by

(A) 30%
(B) 40%
(C) 50%
(D) 60%
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M

Mr. Dubey • 51.32K Points
Coach

Q. 288) 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
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M

Mr. Dubey • 51.32K Points
Coach

Q. 289) The slump test of concrete is used to mesure its

(A) consistency
(B) mobility
(C) homogeneity
(D) all of these
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M

Mr. Dubey • 51.32K Points
Coach

Q. 290) 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)
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