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DFCCIL’21 CE: Daily Practice Quiz. 16-July-2021

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

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

Q1. Water cement ratio is generally expressed volume of water required per
(a) 10 kg cement
(b) 20 kg cement
(c) 50 kg cement
(d) 40 kg cement

Q2. The compressive strength of ordinary Portland cement after 3 days should not be less than:
(a) 50 kg/cm²
(b) 100 kg/cm²
(c) 115 kg/cm²
(d) 150 kg/cm²

Q3. Weight of hammer and free fall height of hammer for modified proctor test is:
(a) 2.5 kg. 30.5 cm
(b) 4.5 kg, 45 cm
(c) 2.5 kg, 45 cm
(d) 4.9 kg. 30.5 cm

Q4. It is known that sheep foot rollers are ideally suitable for compacting excessively fat clay. Which of the following best describes the action of such rollers?
(a) Grinding
(b) Tamping
(d) Rolling

Q5. Simply supported beam having a span of 3m and carrying a uniformly distributed load of 10 kN/m has a shear force, at mid-span, of
(a) 15 kN
(b) 30 kN
(c) 7.5 kN
(d) 0

Q6. In a Mohr’s circle of σ-τ plane (σ = normal stress, τ = shear stress), the vertical diameter represents
(a) Maximum shear stress
(b) Maximum normal stress
(c) Principal stress
(d) Minimum normal stress

SOLUTION

S1. Ans. (c)
Sol. The weight of one bag of cement is 50 kg and the volume of one bag of cement is 35 litres or 0.035 m³

S2. Ans.(d)
Sol.
Minimum compressive strength in N/mm²

S3. Ans.(b)
Sol. in modified proctor test –
The volume of mould = 945 cc
Number of layers = 5
Number of blows = 25
Weight of hammer = 4.54 kg
Hight of freefall = 457.8 mm

S4. Ans.(c)
Sol. sheep foot rollers are ideally suitable for compacting fat clay. Sheep foot roller work in kneading action.

S6. Ans.(a)
Sol. In Mohr circle vertical axis represent shear stress & Horizontal axis represent normal stress so the vertical diameter of circle represents maximum shear stress.

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