Know your strengths and practice your concepts with this quiz on NHPC JE Recruitment 2021. This quiz for NHPC JE Recruitment 2021 is designed specially according to NHPC Syllabus 2021.
Quiz: Civil Engineering
Each question carries 1 mark
Negative marking: 1/4 mark
Time: 8 Minutes
Q1. A clay layer of thickness 10 cm and initial void ratio 0.5 undergoes settlement that final void ratio is 0.2, the settlement of the layer in cm is:
Q2. A water treatment plant treats 6000 m³ of water per day. If it consumes 20 kg chlorine per day, then the chlorine dosage would be
(a) 3.00 mg/l
(b) 3.75 mg/l
(c) 4.25 mg/l
(d) 3.33 mg/l
Q3. For points and crossings, maximum size of ballast is
(a) 50 mm
(b) 40 mm
(c) 25 mm
(d) none of these
Q4. In a Sutro weir, the discharge is proportional to
Q5. The detention period of a septic tank is of the order of
(a) 2-6 hours
(b) 2-4 hours
(c) 12-36 hours
(d) 4-8 hours
Q6. As per IS:800-1984, what is the axial tension for mild steel power driven rivets?
(a) 100 Mpa
(b) 250 Mpa
(c) 415 Mpa
(d) 1000 Mpa
Sol. H=10 cm
Sol. Quantity of water treated per day = 6000 m³
Quantity of chlorine consumed per day = 20 kg.
Chlorine dosage = (Consumed chlorine per day)/(Quantity of water treated per day)
= (20×10^6 mg.)/(6000× 10^3 l.)
= 3.33 mg/l.
|Type of Sleepers||Size of ballast|
|Wooden & cost Iron sleepers
CST-9 & Through sleepers
Points & Crossing
S4. Ans. (d)
Sol. Relation for discharge over weir
Q ∝ H^n
n = 3/2 for Reatangular weir
n = 5/2 for triangular weir
n = 1 for Proportional or Sutro weir
Sol. The detention period of septic tank is 12 to 36 hours.
Sol. Maximum permissible stress.
|Power driven Shop rivet||100||100||300|
|Hand driver shop rivet||80||80||250|