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DFCCIL’21 CE: Daily Practice Quiz. 03-September-2021

DFCCIL (Dedicated Freight Corridor Corporation of India Limited) Exam Date 2021 on September and October 2021 so boost your preparation by attempt this Civil Engineering Building Construction Technology quiz for DFCCIL recruitment 2021.

Quiz: Civil Engineering
Topic: Building Construction Technology

Each question carries 1 mark
Negative marking: 1/4 mark
Time: 8 Minutes

Q1. The concrete having a slump of 6.6 cm, is said to be
(a) Plastic
(b) Dry
(c) Earth-moist
(d) Semi-plastic

Q2. The nail diameter should not be more than (t = least thickness of the wooden member to be connected)
(a) t/6
(b) t/8
(c) t/10

Q3. Which of the following is not a supplementary cementitious material?
(a) Fly ash
(b) Micro silica
(c) Rice husk ash
(d) Kaolinite

Q4. Duco paints are
(a) Cellulose paints
(b) Oil paints
(c) Plastic paints
(d) Emulsion paints

Q5. Which of the following statement regarding the cement fineness is NOT correct?
(a) Fine cement is more liable to suffer from shrinkage cracking than a coarse cement
(b) Fine cement will show faster rate of hardening than coarse cement
(c) Fine cement shows faster rate of heat evolution and total quantity of heat evolved is much larger than coarse cement
(d) none of these

Q6. Workability of concrete for a given water content is good if the aggregates are
(a) Angular aggregates
(b) Flaky aggregates
(c) Rounded aggregates
(d) Irregular aggregates

S1. Ans.(a)

Degree of workability Consistency Slump


Extremely low Moist Earth 0
Very low Very dry 0-25
Low Dry 25-50
Medium Plastic 50-100
High Semi-fluid 100-175

S2. Ans.(a)
Sol. The nail diameter should not be more than t/6.
t = least thickness of the wooden member to be connected.

S3. Ans.(d)
Sol. Kaolinite is a mineral; hence it is not a supplementary material while fly ash, micro silica and rice husk ash are supplementary cementitious material.

S4. Ans.(a)
Sol. Duco paints are cellulose paints. They have excellence water resistance, fast – drying finish, self levelling properties and high durability.

S5. Ans.(c)
Sol. Total quantity of heat evolved is same for both fine as well as coarse cement.

S6. Ans.(c)
Sol. Rounded aggregate has minimum percentage of voids hence provided more workability while flaky aggregate has maximum percentage of voids hence provided minimum workability.

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