Quiz: Civil Engineering
Each question carries 1 mark
Negative marking: 1/3 mark
Time: 8 Minutes
Q1. An area of a field is 250 square centimeters from a shrunk map having shrunk factor of 0.9. Calculate the original area (Square meters) on the field, if the original scale of the map is 1 cm = 50m.
Q2. A cohesive soil yields a maximum dry density of 16 kN/m³ during a standard proctor Compaction test. What would be its void ratio the specific gravity is 2.60 –
Q3. The pressure sustained per unit deformation of subgrade at specified deformation level using specified plate size is termed as
(b) Safe bearing capacity
(c) Tangent modulus
(d) Modulus of subgrade reaction
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. Measured Area of field on map = 250 cm²
Shrinkage factor (S.F) = 0.9
Original scale (S) = 1 cm = 50 m.
Original area of map =(Measured area )/(S.F.)^2
Scale (S) = 1 cm = 50 m.
Hence, Area of field = 308.64 × (50)^2 = 771600 m²
Sol. dry density (r_d )= 16kN/m³
Sol. The pressure sustained per unit deformation of subgrade at specified deformation level using specified plate size is termed as modulus of subgrade reaction.
▭(Moduius of subgrade reaction (K)=(pressure (P))/(Deflection (D)))
(unit = kg/m³)
It is generally calculated at 0.125 cm or 1.25 mm.
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|