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MCQOPTIONS
This section includes 1888 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 901. |
Consider the following statements :1. Alum coagulation decreases the alkalinity of water.2. Alum coagulation increases permanent hardness of water.3. Alum coagulation decreases pH of water.4. Alum coagulation produces aluminium hydroxide flocks in the flocculation process.Which of the statements given above are correct ? |
| A. | 1, 2, 3 and 4 |
| B. | 1, 3 and 4 only |
| C. | 1 and 2 only |
| D. | 2, 3 and 4 only |
| Answer» B. 1, 3 and 4 only | |
| 902. |
Consider the following statements :I. The intersection of the first and last ray in funicular diagram is on the line of action of the resultant.II. Intersection of first and last ray in polar diagram gives the magnitude of the resultant. Of these statements : |
| A. | both I and II are true |
| B. | I is false but II is true |
| C. | I is true but II is false |
| D. | both I and II are false |
| Answer» D. both I and II are false | |
| 903. |
What is the normal depth in a wide rectangular channel carrying 0.5 m3/s discharge at a bed slope of 0.0004 and Manning's n = 0.01 ? |
| A. | 0.13 m |
| B. | 0.32 m |
| C. | 0.43 m |
| D. | 0.50 m |
| Answer» D. 0.50 m | |
| 904. |
A bed of sand consists of three horizontal layers of equal thickness. The value of Darcy's k for the upper and lower layers is 1 x 10-2 cm/sec and that for the middle layer is 1 x 10-1 cm/sec. The ratio of the permeability of the bed in the horizontal direction to that in the vertical direction is |
| A. | 10.0 to 1 |
| B. | 2.8 to 1 |
| C. | 2.0 to 1 |
| D. | 1 to 10 |
| Answer» C. 2.0 to 1 | |
| 905. |
Undisturbed soil samples are required for conducting |
| A. | hydrometer test |
| B. | shrinkage limit test |
| C. | consolidation test |
| D. | specific gravity test |
| Answer» D. specific gravity test | |
| 906. |
Electrostatic precipitator is a device to control |
| A. | SO2 emission |
| B. | Particulate emission |
| C. | Both SO2 and particulate emission |
| D. | Precipitation of Al(OH)3 in water coagulation. |
| Answer» C. Both SO2 and particulate emission | |
| 907. |
Ratio of bearing capacity of double Under Reamed (U.R.) pile to that of single U.R. pile is nearly |
| A. | 2 |
| B. | 1.5 |
| C. | 1.2 |
| D. | 1.7 |
| Answer» C. 1.2 | |
| 908. |
A three-hinged circular arch ACB is formed by two quadrants of circles AC and BC of radii 2R and R respectively with C as crown, as shown in the figure at side. Consider the following in respect of the reactive forces developed at support A and B due to concentrated load W at the Crown. 1. Line of action RA at A is inclined as 45° to the horizontal. 2. VA = VB = W/2 3. HB = 2 HA 4. HA = HB = W/2 Which of the above is/are correct ? |
| A. | 1 and 3 |
| B. | 2 and 3 |
| C. | 1, 2 and 4 |
| D. | 4 only |
| Answer» B. 2 and 3 | |
| 909. |
Consider the following statements :A high lime content in a composite cement-lime mortor results in1. slow hardening.2. quick setting.3. weaker mortar.Of these statements : |
| A. | 2 and 3 are correct |
| B. | 1 and 2 are correct |
| C. | 1 and 3 are correct |
| D. | 1, 2 and 3 are correct |
| Answer» C. 1 and 3 are correct | |
| 910. |
Uniformity coefficient of filter sand is given by : |
| A. | D50/D5 |
| B. | D50/D10 |
| C. | D60/D5 |
| D. | D60/D10 |
| Answer» E. | |
| 911. |
What does high COD to BOD ratio of an organic pollutant represent ? |
| A. | High biodegradability of the pollutant |
| B. | Low biodegradability of the pollutant |
| C. | Presence of free oxygen for aerobic decomposition |
| D. | Presence of toxic material in the pollutants |
| Answer» B. Low biodegradability of the pollutant | |
| 912. |
Which of the following determination are NOT necessary for raw water from a lake for use as source of supply of water for boiler-feed ?1. Turbidity2. Bacterial count3. Iron4. Hardness.Select the correct answer using the codes given below : |
| A. | 1, 2 and 3 |
| B. | 1, 2 and 4 |
| C. | 1, 3 and 4 |
| D. | 2, 3 and 4 |
| Answer» B. 1, 2 and 4 | |
| 913. |
Which one of the following is not a standard spike for railways ? |
| A. | Dog spike |
| B. | Cat spike |
| C. | Screw spike |
| D. | Round spike |
| Answer» C. Screw spike | |
| 914. |
.The displacement thickness of a boundary layer is |
| A. | The distance to the point where (v/V) = 0.99 |
| B. | the distance where the velocity v is equal to the shear velocity V‚àó that is where v = V‚àó |
| C. | the distance by which the main flow is to be shifted from the boundary to maintain the continuity equation |
| D. | one-half the actual thickness of the boundary layer |
| Answer» B. the distance where the velocity v is equal to the shear velocity V‚àó that is where v = V‚àó | |
| 915. |
The following four hydrological features have to be estimated or taken as inputs before one can compute the flood hydrograph at any catchment outlet:1. Unit hydrograph2. Rainfall hydrograph3. Infiltration index4. Base flowThe correct order in which they have to be employed in the computations is |
| A. | 1, 2, 3, 4 |
| B. | 2, 1, 4, 3 |
| C. | 2, 3, 1, 4 |
| D. | 4, 1, 3, 2 |
| Answer» D. 4, 1, 3, 2 | |
| 916. |
Which one of the following methods would give accurate results in determining the direction of the observer's meridian ? |
| A. | Observation of circumpolar stars on the same vertical |
| B. | Observation of circumpolar stars at culmination |
| C. | Extra-meridian observation of a circumpolar star |
| D. | Observation of the sun at equal altitudes |
| Answer» C. Extra-meridian observation of a circumpolar star | |
| 917. |
A stone dropped from the top of a tower is found to travel (5/9) of the height of the tower during the last second of its fall. What is the total time of fall ? |
| A. | 2 s |
| B. | 3 s |
| C. | 6 s |
| D. | 4 s |
| Answer» C. 6 s | |
| 918. |
Sewage sickness is a term used for |
| A. | persons who become sick after drinking polluted water |
| B. | a treatment plant which does not function properly |
| C. | a stream where the flora and fauna die due to sewage inflow |
| D. | the condition of land where sewage is applied continuously for a long period. |
| Answer» E. | |
| 919. |
At a certain station, the mean of the average temperature is 25°C and mean of the maximum daily temperature is 40°C. What is the airport reference temperature (ART) ? |
| A. | 46.6°C |
| B. | 45°C |
| C. | 35°C |
| D. | 30°C |
| Answer» E. | |
| 920. |
Which one of the following is the most critical rivet in the joint shown in the figure given? |
| A. | No. 1 |
| B. | No. 2 |
| C. | No. 3 |
| D. | No. 4 |
| Answer» D. No. 4 | |
| 921. |
A Rankine (oval) half-body PP is subjected to a two-dimen-sional flow (x, y coordinate directions from origin O) with uniform velocity V, resulting in typical streamlines as shown in the figure by dotted lines. The point A on the body surface is |
| A. | separation point |
| B. | stall point |
| C. | stagnation point |
| D. | point of maximum velocity |
| Answer» D. point of maximum velocity | |
| 922. |
For a fully saturated clay Skempton's pore pressure parameter B is |
| A. | zero |
| B. | between zero and 1 |
| C. | 1 |
| D. | more than 1 |
| Answer» D. more than 1 | |
| 923. |
In a close-coiled helical spring subjected to an axial load, other quantities remaining the same, if the wire diameter is doubled, then the stiffness of the spring when compared to the original one, will become |
| A. | twice |
| B. | four times |
| C. | eight times |
| D. | sixteen times |
| Answer» E. | |
| 924. |
A simply supported beam of constant width and varying depth and uniform strength is subjected to a central concentrated load. The depth of the beam dx at a distance x from one of the supports is proportional to |
| A. | x1/2 |
| B. | x1/3 |
| C. | x |
| D. | x2 |
| Answer» B. x1/3 | |
| 925. |
A fill having a volume of 150, 000 cm is to be constructed at a void ratio of 0.8. The borrow pit soil has a void ratio of 1.4. The volume of soil required (in cubic metres) to be excavated from the borrow pit will be |
| A. | 1, 87, 500 |
| B. | 2, 00, 000 |
| C. | 2, 10, 000 |
| D. | 2, 50, 000 |
| Answer» C. 2, 10, 000 | |
| 926. |
An upward hydraulic gradient i of a certain magnitude will initiate the phenomenon of boiling in granular soils. The magnitude of this gradient is |
| A. | 0 ≤ i ≤ 0.5 |
| B. | 0.5 < t < 1.0 |
| C. | i ‚âÖ 1.0 |
| D. | l < i ≤ 2 |
| Answer» D. l < i ‚⧠2 | |
| 927. |
Zero hardness of water is achieved by : |
| A. | using lime soda process |
| B. | excess lime treatment |
| C. | ion exchange method |
| D. | using excess alum dosage |
| Answer» D. using excess alum dosage | |
| 928. |
The ratio of the "standard error of a single observation of unit weight" to the standard error of the arithmetic mean of 'n' observation all of unit weight, will be |
| A. | (1/n) |
| B. | n2 |
| C. | 3n |
| D. | n |
| Answer» E. | |
| 929. |
Soil at a site consists of two layers. The top layer has permeability k units and bottom layer has permeability 5k units. If the thickness of both the layers is equal, then what is the average permeability in the vertical direction ? |
| A. | 3k units |
| B. | (5/3)k units |
| C. | (6/5)k units |
| D. | (5/6)k units |
| Answer» C. (6/5)k units | |
| 930. |
Consider the following statements associated with the laws of weights in the theory of erros :1. If an equation is multiplied by its own weight, then the weight of the resulting equation is equal to the reciprocal of the weight of the equation.2. The weight of the algebraic sum of two or more quantities is equal to the reciprocal of the sum of the individual weights.3. If the quantity of a given weight is multiplied by a factor, then the weight of the result is obtained by dividing its given weight by the square root of that factor.4. If the quantity of a given weight is divided by a factor, then the weight of the result is obtained by multiplying its given weight by the square of that factor.Of these statements : |
| A. | 1 and 4 are correct |
| B. | 2 and 3 are correct |
| C. | 3 and 4 are correct |
| D. | 1 and 3 are correct |
| Answer» E. | |
| 931. |
As per Terzaghi's equation, the bearing capacity of strip footing resting on cohesive coil (c = 10 kN/m2) for unit depth and unit width (assume Nc as 5.7 ) is |
| A. | 47 kN/m2 |
| B. | 57 kN/m2 |
| C. | 67 kN/m2 |
| D. | 77 kN/m2 |
| Answer» C. 67 kN/m2 | |
| 932. |
What is the discharge corresponding to a critical depth of 1.20 m in a 3.0 m wide rectangular channel: |
| A. | 4.12 m3/s |
| B. | 4.94 m3/s |
| C. | 8.24 m3/s |
| D. | 12.35 m3/s |
| Answer» E. | |
| 933. |
For ornamental work, which type(s) of bricks is/ are preferred ?1. Silica bricks2. Silica lime bricks3. Bricks produced in autoclavesSelect the correct answer using the code given below : |
| A. | 1 and 3 only |
| B. | 2 and 3 only |
| C. | 1 only |
| D. | 2 only |
| Answer» C. 1 only | |
| 934. |
What is the curve resistance for a 50 tonnes train on a BG track on a 4° curve? |
| A. | 0.05 tonne |
| B. | 0.06 tonne |
| C. | 0.08 tonne |
| D. | 0.01 tonne |
| Answer» D. 0.01 tonne | |
| 935. |
For the beam shown in figure, what are the distribution factors at joint B ? |
| A. | 0.4, 0.6 |
| B. | 0.5, 0.5 |
| C. | 0.6, 0.4 |
| D. | 0.65, 0.35 |
| Answer» C. 0.6, 0.4 | |
| 936. |
Westergaard's formula for vertical stress gives greater value of stress than that by the Boussinesq's formula, when r/z exceeds : |
| A. | 1.5 |
| B. | 2.5 |
| C. | 3.5 |
| D. | 4 |
| Answer» B. 2.5 | |
| 937. |
A floating body is in stable equilibrium |
| A. | when its metacentric height is zero |
| B. | when the centre of gravity of the body is below the centre of buoyancy |
| C. | when its metacentre is above the centre of gravity of body |
| D. | in none of the above situations |
| Answer» D. in none of the above situations | |
| 938. |
A concentrated load W moves on the span of a three-hinged arch. The horizontal thrust at the supports is maximum when the load is at which one of the following ? |
| A. | The springing |
| B. | One-sixth of the span from one end |
| C. | Quarter span |
| D. | The crown |
| Answer» E. | |
| 939. |
If a soil sample of weight 0.18 kg having a volume of 10-4 m3 and dry unit wt. of 1600 kg/m3 is mixed with 0.02 kg of water then the water content in the sample will be |
| A. | 0.3 |
| B. | 0.25 |
| C. | 0.2 |
| D. | 0.15 |
| Answer» C. 0.2 | |
| 940. |
When is a soil mass said to have entered the solid phase ? |
| A. | When loss in water is not accompained by a corresponding reduction in the volume of soil mass |
| B. | When reduction in the volume of the soil mass is nearly equal to the volume of water lost. |
| C. | When the soil mass becomes brittle |
| D. | When the soil mass shows a small shearing resistance as the water content is reduced. |
| Answer» B. When reduction in the volume of the soil mass is nearly equal to the volume of water lost. | |
| 941. |
A prismatic bar of uniform cross-sectional area of 5 cm2 is subjected to axial loads as shown in the given figure. Portion BC is subjected to an axial stress of |
| A. | 400 kg/cm2 tansion, |
| B. | 2000 kg/m2 compression |
| C. | 1000 kg/cm2 tension |
| D. | 600 kg/cm2 tension |
| Answer» C. 1000 kg/cm2 tension | |
| 942. |
A smooth sphere of weight W is supported in contact with a smooth vertical wall by a string fastened to a point on its surface, the other end being attached to a point in the wall as shown in the given figure. If the length of the string is equal to the diameter of the sphere, then the tension in the string and the reaction of the wall respectively will be |
| A. | 4W/3, 2W/3 |
| B. | 2W/3, W/3 |
| C. | 5W/3, W/3 |
| D. | 3W/3, W/3 |
| Answer» C. 5W/3, W/3 | |
| 943. |
If the stream function is ψ = 2 xy, then the velocity at a point (1, 2) is equal to |
| A. | 2 |
| B. | 4 |
| C. | 20 |
| D. | 16 |
| Answer» D. 16 | |
| 944. |
The correct sequence of processes in a water treatment plant for rural water supply is |
| A. | Chlorination, aeration, sedimentation, rapid sand filter |
| B. | Coagulation, sedimentation, slow sand filter, chlorination |
| C. | Coagulation, flocculation, clarification, pressure filter |
| D. | Aeration, plain sedimentation, slow sand filter, chlorination |
| Answer» B. Coagulation, sedimentation, slow sand filter, chlorination | |
| 945. |
Consider the following statements :The principle of superpositions is applied to :1. Linear elastic bodies2. Bodies subjected to small deformations. Of these statements : |
| A. | 1 alone is corrrect |
| B. | 1 and 2 are correct |
| C. | 2 alone is correct |
| D. | neither 1 nor 2 is correct |
| Answer» B. 1 and 2 are correct | |
| 946. |
The spacing of tile drains to relieve water-logged land is directly proportional to the |
| A. | depth of drain below the ground surface |
| B. | depth of impervious strata from the drain |
| C. | depth of drain below the water level |
| D. | coefficient of permeability of the soil to be drained |
| Answer» E. | |
| 947. |
Which one of the following statements best defines a 'level surface'? |
| A. | A horizontal surface every element of which is normal to plumb line |
| B. | A curved surface every element of which is perpendicular to the spheroidal shape of the earth |
| C. | A plane surface which is perpendicular at all points to the direction of gravity |
| D. | A curved surface which is perpendicular to the direction of gravity at every point |
| Answer» E. | |
| 948. |
A city supply of 15000 cubic metres of water per day is treated with a chlorine dosage of 0.5 ppm. For this purpose, the requirement of 25% bleaching powder per day would be |
| A. | 300 kg |
| B. | 75 kg |
| C. | 30 kg |
| D. | 7.5 kg |
| Answer» D. 7.5 kg | |
| 949. |
The area of a plot is to be determined using Simpson's rule. The following offsets were taken to a boundary from points along a chain line all measurements being in metres 12, 15, 22, 29, 36, 38, 31, 22, 17.There were taken at 100 m intervals. Consider the following steps in this regard.1. 2. Sum of the odd ordinates = 22 + 36 + 1 = 893. Sum of the even ordinates = 15 + 29 + 38 + 22 = 1044. 12 + 17 = 395. Area = 100 (19.5 + 89 + 104)6. Area = (39 + 2 x 89 + 4 x 104)7. Area 100 x 19.5 (104 - 89)The area of the plot can be determined by using the steps listed above : |
| A. | 1, 2, 3 and 5 |
| B. | 1, 3, 4 and 6 |
| C. | 1, 2, 4 and 7 |
| D. | 2, 3, 4 and 6 |
| Answer» E. | |
| 950. |
Clapeyron's theorem is applied to |
| A. | simply supported beam |
| B. | fixed and continuous beam |
| C. | propped cantilever beam |
| D. | continuous beam only |
| Answer» D. continuous beam only | |