RSMSSB-JE’21 CE: Daily Practices Quiz. 22-July-2021

Quiz: Civil Engineering
Exam: RSMSSB-JEn
Topic: Miscellaneous

Each question carries 1 mark
Negative marking: 1/3 mark
Time: 8 Minutes

Q1. High alumina cement is produced by fusing together a mixture of
(a) Limestone and bauxite
(b) Limestone, bauxite and gypsum
(c) Limestone, gypsum and clay
(d) Limestone, gypsum, bauxite, clay

Q2. Bolts are most suitable to carry
(a) shear
(b) bending
(c) axial tension
(d) shear and bending

Q3. The water utilized by the plants is available in soils mainly in the form of
(a) Chemical water
(b) Hydroscopic water
(c) Capillary water
(d) Gravity water

Q4. Chlorine usage in the treatment of 25000 m³/day of water has been 9 kg/day. The residual chlorine after 10 minutes contact is 0.2 mg/l. The chlorine demand of water would be nearly
(a) 0.12 mg/l
(b) 0.16 mg/l
(c) 0.22 mg/l
(d) 0.28 mg/l

Q5. The following bearing were observed while traversing with a compass, which stations are affected by local attraction?

Line F.B. B.B.
AB 104°30’ 284°30’
BC 48°15’ 226°0’
CD 290°30’ 115°15’
DA 180°15’ 357°15’

(a) C and D
(b) A and D
(c) A and B
(d) B and C

Q6. What is the mechanical widening required for a pavement of width 7 m. on a horizontal curve of radius 490 m, if the longest wheel base of vehicle expected on the road is 7.0 m?
(a) 0.05 m
(b) 0.07 m
(c) 0.1 m
(d) 0.49 m

Solutions

S1. Ans.(a)
Sol. High alumina cement is produced by fusing a mixture of Limestone and Bauxite. The initial and final setting time of High alumina cement is 30 min. and 10 hours respectively.

S2. Ans.(c)
Sol. Bolts are used as temporary fastenings while rivets are used as permanent fastening. Bolts are primarily design for axial tension.

S3. Ans.(c)
Sol. The water utilized by the plants is available in soils mainly in the form of capillary water. Capillary water is responsible for growth of plants while hydroscopic water is attached with the soil particle hence it cannot be extracted by plants.

S4. Ans.(b)
Sol. Given,
Quantity of water treated = 25000 m³/day
Chlorine use = 9 kg/day
Chlorine dose = (Chlorine used)/(Quantity of water treated)
=(9 kg/day)/(25000 m^3/day)
=(9×10^6 mg/day)/(25000×10^3 l/day)
= 0.36 mg/l
Chlorine demand = Chlorine dose – Residual chlorine
= 0.36 – 0.2
= 0.16 mg/l

S5. Ans.(a)
Sol. Since difference of F.B and B.B of line AB differs by 180°. Hence both stations A and B are unaffected by local attraction and station C and D are affected by local attraction.

S6. Ans.(c)
Sol. Given, length of wheel base (l) = 7 m.
Radius (R) = 490 m
No. of lanes (n) = 2
Mechanical widening, W_me = (nl^2)/2R
=(2×(7^2 ))/(2×490)
= 0.1 m

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