Engineering :: Concrete Technology
111.
The minimum particle size of fine aggregate is
A. 0.0075 mm
B. 0.075 mm
C. 0.75 mm
D. 0.95 mm
Answer: B
Explanation:
112.
The aggregates of
A. irregular
B. angular
C. rounded
D. flaky
Answer: C
Explanation:
113.
The aggregates of
A. irregular
B. angular
C. rounded
D. flaky
Answer: B
Explanation:
114.
The size of an aggregate is determined by length gauge.
Answer: B
Explanation:
115.
The aggregates of rounded shape require minimum cement paste to make good concrete.
Answer: A
Explanation:
116.
Which of the following statement is correct?
A. The maximum size of coarse aggregate should not exceed one-fourth of the minimum dimension of the plain concrete member.
B. the maximum size of coarse aggregate should not exceed one-fifth of the minimum dimension of the reinforced concrete member
C. The aggregates of 40 mm, 20 mm and 10 mm sizes are commonly used for concrete works.
D. all of the above
Answer: D
Explanation:
117.
The aggregate is said to be flaky 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
Answer: A
Explanation:
118.
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
Answer: D
Explanation:
119.
If the aggregate completely passes through a 50 mm sieve and retained on 40 mm sieve, then the particular aggregate is said to be flaky if its least dimension is less than
Answer: A
Explanation:
120.
Bulk 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
Answer: B
Explanation:
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