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. If the R.L. of canal bed level and high flood level of drainage are 212.0 m and 210 m respectively, then the cross-drainage work will be
(c) Syphon aqueduct
(d) Super passage
Q2. Minimum pitch of rivets shall not be less than
(a) 1.5 d
(b) 2.0 d
(c) 2.5 d
(d) 3.0 d
Q3. A simply supported beam is considered as a deep beam is the ratio of effective span to overall depth is less than
Q4. The maximum safe permissible limit of sulphates in domestic water supply is
(a) 200 mg/l
(b) 600 mg/l
(c) 100 mg/l
(d) 500 mg/l
Q5. Calculate the length (m.) of the longer chord of 260 m radius curve having deflection angle of 90 degree.
(a) 353.6 m
(b) 392.7 m
(c) 367.7 m
(d) 500 m
Q6. A soil has bulk density of 22 kN/m³ and water content 10%. The dry density is
(a) 20 kN/m³
(b) 15 kN/m³
(c) 18 kN/m³
(d) 19 kN/m³
Sol. Given, canal bed level = 212.0 m.
High flood level of drainage = 210.0 m.
Bed level of canal is quite higher than high flood level of drainage, hence the cross-drainage work will be aqueduct.
Sol. → minimum pitch of rivet = 2.5d
→ maximum pitch for compression = (12t,200)_minimum
→ maximum pitch for tension = (16t,200)_minimum
Sol. According to clause 29.1 or IS 456 : 2000
A beam shall be deemed to be deep beam when the ratio of effective span to overall depth l/D is less than:
1. 2.0 for a simply supported beam; and
2. 2.5 for a continuous beam.
Sol. The maximum safe-limits in domestic water supply are:
Chloride ≤ 250 mg/l
Nitrates ≤ 45 mg/l
Sulphates ≤ 200 mg/l
Fluorides ≤ 1.5 mg/l
Sol. Given, Radius of curve (R) = 260 m.
Deflection angle (∆) = 90°
Length of Long chord is given by–
T₁DT₂ = 2R sin ∆/2
= 2 × 260 × sin 90/2
▭(T_1 DT_2=367.7 m)
▭(γ_d=20 kN\/m^3 )