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. The actual thickness of a butt weld when compared with the thickness of the plate is?
(b) More or Less
Q2. The annual installment (I) of the sinking fund (S) over n years, at i rate of interest may be calculated from the formulae
(b) I=S (1+i)^(n-1)/i
(c) I=S (1+i)^(n+1)/ (1+i)
(d) I=Si / (1+i)^(n+1)
Q3. When the width is 10 sq. m in plan area an excavation exceeding 1.5 m with depth not exceeding 30 cm, it is termed as:
(b) Surface excavation
Q4. A water treatment works treats 5000 cubic meters of water per day. If it consumes 20kg chlorine per day, then the chlorine dosage would be
(a) 10 mg/l
(b) 4 mg/l
(c) 0.4 mg/l
(d) 0.25 mg/l
Q5. The following proportion of cement: sand (mortar) is normally used for brick masonry construction:
(b) 1: 6
Q6. Tapering steps provided for changing the direction of a stair is termed as__________.
Sol. Effective throat thickness in butt weld is assumed to be 5/8 th of thickness of thinner member.
Sol. Annual installment of sinking fund(I) = Si/([(1+i)]^n-1)
Where i = rate of interest
n = design life of structure
S = total sinking fund.
Sol. When the width is 10 m² in plan area an excavation exceeding 1.5 m. with depth not exceeding 30 cm. then it is termed as surface excavation.
Hence for surface excavation-
Width of trench > 1.5 m
Surface area > 10 m²
Thickness of earthwork < 0.3 m.
Sol. total Quantity of water treated = 5000 m³/day
= 5000×10³ l/day
Consumed chlorine per day = 20 kg
= 20 × 10^6 mg.
Chlorine dosage = (consumed chlorine Per day)/(Total Quantity of water treated per day)
= (20×10^6)/(5×10^6 )
= 4 mg/litre.
Sol. The proportion of cement : Sand (mortar) is normally used for brick masonry construction is 1:6. If the thickness of wall is less than 19 cm, then proportion of cement: sand should be taken as 1:4.
Sol. Winder → These are tapering steps which are provided for changing the direction of a stair.