QUIZ : CIVIL ENGINEERING ( 14 JULY 2021)

Quiz: Civil Engineering
Exam: DFCCIL-JE
Topic: MISCELLANEOUS

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

Q1. Quick setting cement is produced by adding ______.
(a) Less amount of gypsum in very fine powdered form
(b) More amount of gypsum in very fine powdered form
(c) Aluminium sulphate in very fine powdered form
(d) Pozzolana in very fine powdered form

Q2. If the smallest division of a Vernier is longer than the smallest division of its primary scale, the Vernier is known as _______.
(a) Direct Vernier
(b) Double Vernier
(c) Simple Vernier
(d) Retrograde Vernier

Q3. The slope correction for a length of 30 m along a gradient of 1 in 20 is ______.
(a) 3.75 cm
(b) 0.375 cm
(c)37.5 cm
(d) 2.75 cm

Q4. If the chain line which runs along N-S direction is horizontal and the ground in E-W direction is slopping ________.
(a) it is possible to set offsets correctly on east side
(b) it is possible to set offsets correctly on east side
(c) it is not possible to set offsets correctly on west side
(d) it is possible to set offsets correctly on both sides

Q5. The property of a soil which permits water to percolate through it, is called______.
(a) Moisture content
(b) Permeability
(c) Capillarity
(d) None of these

Q6. The line of action of the buoyant force acts through the centroid of the ______.
(a) Submerged body
(b) Volume of the floating body
(c) Volume of the fluid vertically above the body
(d) Displaced volume of the fluid

SOLUTION

S1. Ans.(c)
Sol. Quick Setting Cement as the name indicates, these types of cements are used where quick setting is needed. The quick setting cement is manufactured by adding a small percentage of aluminum sulphate and then it is finely grinded with cement. The Initial setting time of quick setting cement is 5 minutes and Final setting time is 30 minutes.

S2. Ans.(d)
Sol. A retrograde vernier is similar to the direct vernier, except its graduations are at a slightly larger spacing. In direct vernier it has N no. of graduation but in retrograde Vernier it has N+1 no. of graduations. Both Direct and retrograde verniers are read in the same manner.

S3. Ans.(a)
Sol. Given, Length=30m, h= 1/(√(〖(20)〗^2+1) )×30=1.5m.
Correction for a slope = h^2/2l = 〖1.5〗^2/(2×30) = 0.0375m. =3.75 cm.

S4. Ans.(d)
Sol. In chain surveying only linear measurements are made that is lengths are only measured by chain or tape. Chain surveying is the simplest and the most accurate kind of surveying. If the chain line which runs along N-S direction is horizontal and the ground in E-W direction is slopping is possible to set offsets correctly on both sides.

S5. Ans.(b)
Sol. Soil permeability is the property of the soil to transmit water and air through it. The permeability in soil mechanics is a measure that how easily water can flow through a porous soil medium.

S6. Ans.(d)
Sol. The line of action of the buoyant force passes through the centroid of the displaced volume of fluid. The point through which Force of Buoyancy acts is called the center of buoyancy.

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