DFCCIL'21 CE: Daily Practice Quiz. 26-August-2021 |_00.1
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DFCCIL’21 CE: Daily Practice Quiz. 26-August-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 Reinforced Concrete Cement (RCC) quiz for DFCCIL recruitment 2021.

Quiz: Civil Engineering
Exam: DFCCIL-JE
Topic: Reinforced Concrete Cement (RCC)

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

Q1. The range within which a load can be applied on a rectangular column to avoid any tensile stress –
(a) One-half of the base
(b) One-third of the base
(c) One-fourth of the base
(d) One-fifth of the base

Q2. For slabs spanning in two directions the ratio of span to depth should not exceed:
(a) 15
(b) 25
(c) 35
(d) 50

Q3. In a simply supported slab, alternate bars are curtailed at:
(a) span/5
(b) span/6
(c) span/7
(d) span/8

 

Q4. Minimum spacing between horizontal parallel reinforcement of different sizes, should not be less than……….
(a) one diameter of thinner bar
(b) one diameter of thicker bar
(c) sum of the diameters of thinner and thicker
(d) twice the diameter of thinner bar

Q5. The factored loads at the limit state of collapse for DL+ LL, DL + WL and DL + LL + WL combinations, according to IS : 456 – 2000 are respectively
(a) 1.5 DL + 1.5 LL, 1.2 DL + 1.2 WL, 1.5 DL + 1.5 LL + WL
(b) (0.9 or 1.5) DL + 1.5 LL, 1.5 DL + 1.5 WL, 1.2 DL + 1.2 LL + 1.2 WL
(c) 1.2 DL + 1.2 LL, 1.5 DL + 1.5 WL, 1.5 DL + 1.5 LL + 1.5 WL
(d) 1.5 DL + 1.5 LL, (0.9 or 1.5) DL + 1.5 WL, 1.2 DL + 1.2 LL + 1.2 WL

Q6. According to whitney’s theory, the maximum depth of concrete stress block in a balanced RCC beam section of depth ‘d’ is…………
(a) 0.3 d
(b) 0.43 d
(c) 0.5 d
(d) 0.53 d

SOLUTION

S1. Ans.(b)
Sol.

DFCCIL'21 CE: Daily Practice Quiz. 26-August-2021 |_40.1

→ if load is applied in core of column than no tensile stress occure.
S2. Ans.(c)
Sol. Slab’s spanning in one direction (one way slab)
l/d=30
Slab’s spanning in two direction (two way slab)
l/d<35 (simply supported)
l/d≤40 (continuous)

S3. Ans.(c)
Sol. in simply supported slab, alternate bars are curtailed at [span/7]

S4. Ans.(b)
Sol. the horizontal distance between two parallel main reinforcing bars shall not less than the following –
-If diameter of bar’s are equal than spacing diameter of bar.
-If diameter of bar’s are unequal then diameter of largest bar.
-5mm more than the nominal maximum size of coarse aggregate.

S5. Ans.(d)
Sol. According to IS. Code table -18
Load combination Limit state of collapse Limit state of serviceability

Load combination Limit state of collapse Limit state of serviceability
DL LL WL/EL DL LL WL/EL
(1) DL+LL 1.5 1.5 1 1
(2) DL+WL/EL 1.5/0.9 1.5 1 1
(3) DL+LL+WL/EL 1.2 1.2 1.2 1 0.8 0.8

S6. Ans.(d)
Sol. Whitney theory given depth of balance section according to mild steel.
(xulim=0.53d)
d→ depth of beam.
Steel grade Limiting depth (xulim)

Steel grade Limiting depth
Fe-250 0.53d
Fe-415 0.48d
Fe-500 0.46d

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