Quiz: Civil Engineering
Each question carries 1 mark
Negative marking: 1/4 mark
Time: 10 Minutes
Q1. While estimating a reinforced cement structure the omitted cover of concrete is assumed _.
(a) At the end of reinforcing bar, not less than 25 mm or twice the diameter of the bar
(b) In thin slabs, 12 mm minimum or diameter of the bar whichever is more
(c) For reinforcing longitudinal bar in a beam 25 mm minimum or diameter of the largest bar which is more
(d) All options are correct
Q2. The ratio of focal length of the objective to stadia interval is called
(a) Additive factor
(b) Multiplying factor
(c) Staff intervals
(d) Subtractive factor
Q3. Horizontal structural members placed at right angles to bridging joists are:
Q4. The condition of zero atmospheric pressure can be expected at
(a) Sea level
(b) Mean sea level
(c) The base of sea
(d) Phreatic surface
Q5. The water utilized by the plants is available in soils mainly in the form of
(a) Chemical water
(b) Hydroscopic water
(c) Capillary water
(d) Gravity water
Q6. Surface tension of water
(a) Increases with decrease in temperature
(a) Decreases with decrease in temperature
(c) Is independent of temperature
(d) None of these
Q7. For Broad Gauge (B.G.) railway passenger platforms should not be
(a) Less than 305 m
(b) Greater than 305 m
(c) Less than 503 m
(d) Greater than 703 m
Q8. Principal planes are subjected to
(a) Normal stresses only
(b) Tangential stresses only
(c) Normal stresses as well as tangential stresses
(d) None of these
Q9. Which of the following represents the approximate overflow rate (liters/hours/m²) for the plain sedimentation tank?
(a) 500 – 750
(b) 800 – 1200
(c) 1200 – 1520
(d) 1650 – 2500
Q10. The limit state of serviceability of a steel structure includes all of the following except.
(b) Crack due to fatigue
(d) Fracture due to fatigue
Sol. While estimating a reinforced cement structure the omitted cover of concrete is assumed –
At the end of reinforcing bar, not less than 25 mm or twice the diameter of the bar.
In thin slabs, 12 mm minimum or diameter of the bar whichever is more.
For reinforcing longitudinal bar in a beam 25 mm minimum or diameter of the largest bar which is more.
Sol. Multiplying factor is the ratio of focal length to the objective of stadia interval.
Where, K = multiplying factor
f = focal length
i = stadia interval
Sol. Binders→ it is provided to take the load of bridging joist and floor toppings,
Girders→ these are placed to support binders.
Screed → it is narrow strips of wood or bands of plaster laid on floor to act as guides to get an even surface for toppings.
Toppings → Top most lair of a floor is called toppings.
Sol. Phreatic line is the top flow line which separates the saturated soil mass from the unsaturated soil mass. Pressure below phreatic line is hydrostatic pressure but pressure on and above phreatic line is atmosphere.
So, condition of zero atmospheric pressure can be expected at phreatic surface.
Sol. The water utilized by the plants is available in soils mainly in the form of capillary water. Capillary water is responsible for growth of plants while hydroscopic water is attached with the soil particle hence it cannot be extracted by plants.
Sol. Surface tension of water increases with decreases in temperature. The main cause of surface tension is unbalanced cohesive force.
Sol. The minimum length of a passenger platform for broad gauge railways should not be less than 305 m.
Sol. There are infinite plane passes through a single point and out of these infinites plane there are three plane which are mutually perpendicular to each other and having zero shear stress, that plane is called principal plane.
Sol. surface overflow rate for plain sedimentation tank is 12,000 to 18,000 l/day/m² or 500 to 750 l/hours/m² while surface overflow rate for sedimentation with coagulation is 24,000 to 30,000 l/day/m² or 1000 to 1250 l/hours/m².
Sol. Limit state of serviceability