Quiz: Civil Engineering
Topic: Building Material & Construction
Each question carries 1 mark
Negative marking: 1/4 mark
Time: 10 Minutes
Q1. The activity of batching in production of concrete refers to:
(a) Weighing of all ingredients within the acceptable tolerances for all batches
(b) Weighing of all ingredients
(c) Most accurate weighing of cement & water that influence strength of concrete
(d)Measuring the workability of concrete
Q2. Addition of sugar in concrete result in………
(a) Increase in setting time by about 1 hr.
(b) Increase in setting time by about 4 hr.
(c) Decrease in setting time by about 1 hr.
(d) Decrease in setting time by about 4 hr.
Q3. Green concrete may be made by adding
(a) Chromium oxide
(b) Iron hydroxide
(c) Barium permanganate
(d) Iron oxide
Q4. For manufacturing coloured glass, the colouring pigments are added in the glass at the stage of
(a) Raw material mixing
Q5. Bakelite is a/an
(c) high resistance conductor
(d) Low resistance conductor
Q6. The commonly used thinner in oil paints is
(c) Both (a) and (b)
(d) Neither (a) and (b)
Q7. The outer protective layer of a tree is
(a) cambium layer
Q8. The defect in timber that causes longitudinal separation of woods between the annular rings is known as___________.
(b) Rind gall
(d) Twisted fibers
Q9. Most commonly used ingredients in cement manufacturing is:
(b) Lime stone
(c) Sand stone
Q10. The purpose of the soundness test of cement is ________:
(a) to determine the presence of free lime.
(b) to determine the setting time
(c) to determine the sound proof quality of cement
(d) to determine the fineness
Sol. Batching→ It is the process of proper and accurate measurement of concrete ingredients. It is either done by mass or volume batching.
Sol. Sugar is used as retarder in concrete. It increase in setting time by about 4 hr.
S3. Ans. (a)
Sol. Green concrete may be made by adding Chromium oxide.
Sol. Colour pigment is added in the manufacturing of glass at the stage of fusion.
Sol. Bakelite is a type of plastic which is used as non-conductive material.
Sol. Thinner is used to reduce the consistency and increase the spread of paints.
Ex. Turpentine oil, Naptha, spirit etc.
Sol. the outer protective layer of a tree is outer bark.
Sol. Shakes It is longitudinal cracks which partially or completely separates the fibres.
(a) Heart shakes cracks run from pith to sapwood.
(b) Cup shakes Appears as partly or completely separates annual rings from one another.
(c) Ring shakes Appears as completely separates annual rings.
(d) Star shakes cracks run from bark to sap wood.
Sol. lime is most important ingredient in manufacturing of cement. It is about 62-65% in cement. Lime is act as binding material in cement.
Sol. soundness test of cement is to determine the presence of lime, magnesia and Sulphur.