DFCCIL'21 CE: Daily Practice Quiz. 08-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 MISCELLANEOUS quiz for DFCCIL recruitment 2021.

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

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

Q1. The four kind of crystal in thin section of cement clinkers, named by Alite, Belite, Celite and _____________
(a) Gelite
(b) Elite
(c) Delite
(d) Felite

Q2. The ratio of various ingredient (cement, sand, aggregates) in concrete of grade M 20 is
(A) 1:2:4
(B) 1:3:6
(C) 1:1.5:3
(D) 1:1:2
(a) Only a
(b) Only b
(c) Both a and b
(d) None of these

Q3. Match List-I (Type of road) with List-II (Recommended camber) and select the correct answer by using the codes given below the lists:
List-I List-II
A. Water bound macadam 1. 1 in 72
B. Bituminous concrete 2. 1 in 60
C. Earth road 3. 1 in 48
D. Rigid pavement 4. 1 in 25
Codes:
A B C D
(a) 1 4 3 2
(b) 4 3 2 1
(c) 2 3 1 4
(d) 3 2 4 1

Q4. If an ascending gradient of 1 in 50 meets another ascending gradient of 1 in 30 then the deviation angle is
(a) 1/50
(b) 1/75
(c) 1/30
(d) 8/150

Q5. The land-width required across the alignment of road is
(a) land between building lines
(b) right of way
(c) land between control lines
(d) roadway

Q6. For circular curve of radius 200 m, the coefficient of lateral friction of 0.15 and the design speed is 40 kmph. The equilibrium super elevation would be?
(a) 21.3
(b) 7
(c) 6.3
(d) 4.6

SOLUTION

S1. Ans. (d)
Sol. The four kind of crystal in thin section of cement clinkers, named by Alite, Belite, Celite and Felite.

Sr.no.	Bogue’s compound	Formula	Name	Symbol
1.	Tricalcium silicate	3CaO.Si	Alite
2.	Dicalcium silicate	2CaO.Si	Belite
3.	Tricalcium aluminate	3CaO	Celite
4.	Tricalcium alumina ferrite	4CaO.	Felite

S2. Ans. (d)
Sol. Nominal mix for different grade of concrete as below.
Concrete Grade Mix ratio

Concrete Grade	Mix ratio
M 7.5	1:4:8
M 10	1:3:6
M 15	1:2:4
M 20	1:1.5:3
M 25	1:1:2

S3. Ans.(d)
Sol. Water bound macadam = 1 in 48
Bituminous concrete = 1 in 60
Earth road = 1 in 25
Rigid pavement = 1 in 72

S4. Ans.(b)
Sol. Given, Ascending gradient (n_1 ) = + (1/50)
Ascending gradient (n_2 )= +(1/30)
Deviation angle (N) = ?
N=|n_1-n_2 |
=|1/50-1/30|
∵|(30-50)/(50×30)|
=20/(50×30)
▭(N=1/75)

S5. Ans.(b)
Sol. Right of way is the area of land acquired for the road, along its alignment. The width of this acquired land is known as land width and it depends on the importance of the road and possible future development

S6. Ans.(c)
Sol. Given,
R=200 m.
f=0.15
v=40 kmph
e_(eq^m )= ?
e_equilibrium=V^2/127R
=(40)^2/(127×200)
=0.0629
=6.29%≈6.3%