Typical Questions on Diploma Civil Engineering | MCQ | Objective

1. To increase the setting time of cement the following is added
(a) Calcium Hydroxide
(b) Sodium
(c) Red Oxide of Mercury
(d) Gypsum

2. Fire resistant mortars are made by using clay
(a) Free from lime
(b) Containing Iron oxide
(c) Containing Dissolved Air
(d) Of low compaction

3. The factor mainly contributing to the strength of cement concrete is
(a) Aggregate Quantity
(b) Cement Quantity
(c) Water Quantity
(d) Water Cement Ratio

4. The type of window provided on the sloping side of a pitched roof is called
(a) Gable window
(b) Dormer window
(c) Lantern
(d) None of these

5. The height between two floors is 3.0 m and riser is 150 mm. Assuming two flights between the floors, the number of the treads will be
(a) 18
(b) 19
(c) 20
(d) 21

6. Floor Area Ratio (FAR) is calculated as
(a) Ratio of total covered area of all floors to the plot area
(b) Ratio of plot area to the total covered area of all floors
(c) Ratio of covered area of ground floor to the plot area
(d) Ratio of plot area to the covered area of ground floor

7. As per the National Building Code, the height of all rooms for human habitation shall not be less than from the surface of the floor to the lowest point of the ceiling (bottom of slab).
(a) 2.5 m
(b) 2.75 m
(c) 3.0 m
(d) 3.25 m

8. Coefficient of friction depends on
(a) Nature of surfaces only
(b) Area of contact only
(c) Both (a) and (b)
(d) None of these

9. In a thin cylinder, the ratio of hoop stress to longitudinal stress is
(a) ½
(b) 2
(c) ¼
(d) 4

10. In case of simply supported I-section beam of span L and loaded with central load W, the length of elasto-plastic zone of the plastic hinge is
(a) L/4
(b) L/5
(c) L/6
(d) L/8

11. Maximum distance between expansion joints in structure as per IS 456 is
(a) 20 m
(b) 30 m
(c) 45 m
(d) 60 m

12. The depth of footing for an isolated column is governed by
1) Maximum bending moment
2) Shear Force
3) Punching Shear;
The Correct answer is:
(a) Only (1)
(b) Both (1) and (2)
(c) Both (1) and (3)
(d) All (1), (2) and (3)

13. The hydraulic gradient line indicates the variation of which of the following?
(a) Velocity head in flow direction
(b) Piezometric head in the direction of flow
(c) Total energy of flow in the direction of flow
(d) None of these

14. Which of the following is an example of free vortex flow?
(a) A whirlpool in a river
(b) Flow of liquid through a hole provided at the bottom of a container
(c) Flow of liquid around a circular bend in a pipe
(d) All of these

15. Mach’s number is defined as the square root of the ratio of
(a) Inertia force to the pressure force
(b) Inertia force to the surface tension force
(c) Inertia force to the elastic force
(d) None of these

16. In a pipe flow, the head loss due to friction is 6 m. If the power transmitted through the pipe has to be the maximum, then the total head at the inlet of the pipe will have to be maintained at
(a) 36 m
(b) 30 m
(c) 24 m
(d) 18 m

17. In open channels, gradually varied flow is caused
(a) When the channel slope is equal to the normal slope
(b) When the pressure forces and the change of momentum are different from each other
(c) When the force causing the flow is not equal to the resistance force
(d) When there is an equilibrium between the forces causing the flow and those opposing it

18. For the best rectangular open channel section, the depth Y and bed width b are related by
(a) Y=b/3
(b) Y=b
(c) Y=b/2
(d) Y=b/4

19. A flood is given a rank m in an observed record of n years. Then according to Weibul’s formula, its return period is given by
(a) n/m
(b) n/(m+1)
(c) n/(m-1)
(d) (n+1)/m

20. If the duration of the unit hydrograph approaches zero, the resulting unit hydrograph is known as
(a) The limiting unit hydrograph
(b) The threshold unit hydrograph
(c) The instantaneous unit hydrograph
(d) The saturated unit hydrograph

21. The target reliability of irrigation release under normal conditions is
(a) 100%
(b) 90%
(c) 75%
(d) 50%

22. Φ index is defined as
(a) The difference between maximum and minimum infiltration capacities
(b) The difference between the total rainfall and the total runoff divided by the duration of the storm
(c) The rainfall intensity above which the rainfall volume equals the observed runoff volume
(d) The minimum infiltration rate during the storm

23. Most of the turbidity meters work on the scattering principle. The turbidity value so obtained is expressed in
(a) CFU
(b) FTU
(c) JTU
(d) NTU

24. Two primary air pollutants are
(a) sulphur oxide and ozone
(b) nitrogen oxide and peroxyacetylnitrate
(c) sulphur dioxide and hydrocarbon
(d) ozone and peroxyacetylnitrate

25. Zero hardness of water is achieved by
(a) lime soda process
(b) excess lime treatment
(c) ion exchange treatment
(d) excess alum and lime treatment

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26. The most common coagulant is
(a) magnesium sulphate
(b) alum
(c) chlorine
(d) bleaching powder

27. Slow sand filter is more efficient for the removal of
(a) Bacteria
(b) Odour
(c) Turbidity
(d) All of these

28. Multi-stage centrifugal pumps are used to
(a) Give high discharge
(b) Produce high heads
(c) Pump viscous fluids
(d) All of these

29. In a reciprocating pump, air vessels are used to
(a) Smoothen the flow
(b) Reduce suction head
(c) Increase delivery head
(d) Reduce acceleration head

30. Surge tank in a hydropower project is used to
(a) Reduce water hammer pressure
(b) Store water
(c) Regulate discharge in the power house
(d) Control sediments entering the turbine

31. The specific speed of a pump is defined as the speed of a unit
(a) Of unit size with unit discharge at unit head
(b) Of such a size that it requires unit power at unit head
(c) Of such a size that it delivers unit discharge at unit head
(d) Of such a size that it delivers unit discharge at unit power.

32. For irrigation purpose, the pH value of water should be
(a) Between 3 and 6
(b) Between 6 and 8.5
(c) Between 8.5 and 11
(d) More than 11

33. A canal aligned approximately parallel to the natural drainage of a country is called
(a) Side slope canal
(b) Contour canal
(c) Watershed canal
(d) Ridge canal

34. Total Energy Line (T.E.L.) represents the sum of
(a) pressure head and kinetic head
(b) datum head and kinetic head
(c) pressure head and datum head
(d) pressure head, kinetic head and datum head

35. The flow in open channel is laminar if the Reynold number is
(a) 2000
(b) less than 2000
(c) less than 5000
(d) none of these

36. The discharge through a trapezoidal channel is maximum when
(a) half of top width = sloping side
(b) top width = sloping side
(c) top width = 1.5 x sloping side
(d) none of these

37. Draft tube is used for discharging water from the exit of
(a) an impulse turbine
(b) a Francis turbine
(c) a Pelton wheel
(d) all of these

38. In selecting site for a rain gauge the nearest object should be at a minimum distance of
(a) twice its height
(b) three times its height
(c) equal to its height
(d) anywhere

39. Double mass curve technique is used
(a) to prepare rainfall hyetograph
(b) to derive the hydrograph
(c) to derive the S-curve hydrograph
(d) to check the consistency of rainfall records

40. A hydrograph is the graph drawn between
(a) discharge in the river and stage in the river
(b) discharge and time
(c) stage and time
(d) none of these

41. The S-curve hydrograph is
(a) the summation of the unit hydrograph
(b) the summation of the total runoff hydrograph
(c) the summation of the rainfall hyetograph
(d) all of these

42. In the case of water table well, the piezometric surface
(a) is above the ground level
(b) is below the water level in the well
(c) coincides with water level in the well
(d) is between the water level in the well and ground level

43. A flood with a return period of 100 years is the flood which occurs
(a) every 100th year
(b) the maximum observed flood in the last 100 years
(c) once in every 100 years on the average
(d) only after 100 years in the immediate future

44. A water borne virus infection is
(a) Cholera
(b) swimmer’s itch
(c) jaundice
(d) cancer

45. The average domestic demand of water for an Indian city is
(a) 135 lpcd
(b) 270 lpcd
(c) 500 lpcd
(d) 750 lpcd

46. Detention time in a “flocculator” is
(a) 10 sec to 20 sec
(b) 20 min to 30 min
(c) 1 hour to 8 hour
(d) 2 hour to 3 hour

47. Ultra violet rays are highly effective for disinfection for
(a) hard water
(b) highly turbid water
(c) water rich in suspended solids
(d) clear water

48. A sanitary sewer is expected to run
(a) Full
(b) half full
(c) 2/3 full
(d) 90% full

49. The velocity of flow in a sewer should be between
(a) 0.6 m/sec and 3 m/sec
(b) 2 m/sec and 10 m/sec
(c) 30 cm/sec and 90 cm/sec
(d) 30 m/sec and 90 m/sec

50. Water present in the soil which cannot be removed except by heating is called
(a) gravity water
(b) capillary water
(c) hygroscopic water
(d) free water