Free Civil Engineering MCQs Mock Test Online with Answers

Q1 : In areas where light rains are uniformly distributed throughout the year, the type of sewerage system to be adopted is_______________?

A: Separate system B: Combined system C: Partially combined system D: None of these

Q2 : Density of water is maximum at ___________________?

A: 0°C B: 0°K C: 4°C D: 100°C

Q3 : The buoyancy depends on__________________?

A: mass of liquid displaced B: viscosity of the liquid C: pressure of the liquid displaced D: depth of immersion

Q4 : Pick up the correct statement from the following?

A: pH value indicates acidity and alkalinity of sewage B: In acidic sewage, the pH value is less than 7 C: In alkaline sewage, the pH value is more than 7 D: All the above

Q5 : In case of Imhoff tanks_____

A: The shape is rectangular B: The velocity of flow is restricted to 0.30 m/minute C: Detention period is 2 hours D: All the above

Q6 : The flow in which conditions do not change with time at any point, is known as _____________________?

A: one dimensional flow B: uniform flow C: steady flow D: turbulent flow

Q7 : Ratio of inertia force to elastic force is known as _____________________?

A: Mach number B: Froude number C: Reynold’s number D: Weber’s number

Q8 : For design of sewers, percentage of sewage discharge is assumed_____________________?

A: 65 to 70% B: 70 to 75% C: 75 to 80% D: 85%

Q9 : The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as____________________?

A: meta center B: center of pressure C: center of buoyancy D: center of gravity

Q10 : In a fully mechanised composting plant, involves________________?

A: Mechanized receipt B: Mechanized segregation C: Mechanized pulverising of refuse D: All of these

Q11 : Property of a fluid by which molecules of different kinds of fluids are attracted to each other is called________________?

A: adhesion B: cohesion C: viscosity D: compressibility

Q12 : The continuity equation is connected with_______________?

A: viscous/unviscous fluids B: compressibility of fluids C: conservation of mass D: open channel/pipe flow

Q13 : For a grit chamber, if the recommended velocity of flow is 0.2 m/sec and detention period is 2 minutes, the length of the tank, is__________________?

A: 16 m B: 20 m C: 24 m D: 30 m

Q14 : The normal values of over flow rates for sedimentation tanks using coagulant, ranges between__________________?

A: 25,000 to 35,000 litres/sqm/day B: 40,000 to 50,000 litres/sqm/day C: 50,000 to 60,000 litres/sqm/day D: 80,000 to 100,000 litres/sqm/day

Q15 : Pick up the correct statement from the following?

A: Anaerobic bacteria flourish in the absence of oxygen B: Aerobic bacteria flourish in the presence of oxygen C: Facultative bacteria flourish with or without oxygen D: All the above

Q16 : A large Roynold number is indication of_________________?

A: smooth and streamline flow B: laminar flow C: steady flow D: highly turbulent flow

Q17 : Which one of the following statements regarding septic tanks is wrong ?

A: A gap of 7.5 cm between the bottom of the covering slab and the top level of scum is provided B: The outlet invert level is kept 5 to 7.5 cm below the inlet invert level C: The minimum width of septic level is 90 cm D: The depth of tank is kept equal to its width

Q18 : The process of diffusion of one liquid into the other through a semi-permeable membrane is called _______________?

A: viscosity B: osmosis C: surface tension D: cohesion

Q19 : The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at the centriod, if __________________?

A: the area is horizontal B: the area is vertical C: the area is inclined D: all of the above

Q20 : The two important forces for a floating body are___________________?

A: The two important forces for a floating body are___________________? B: buoyancy, pressure C: buoyancy, inertial D: inertial, gravity

Q21 : Surface energy per unit area of a surface is numerically equal to___________________?

A: atmospheric pressure B: surface tension C: force of adhesion D: force of cohesion

Q22 : The water carried sewerage system removes__________________?

A: Domestic sewage B: Industrial sewage C: Storm sewage D: .All the above

Q23 : The discharge per unit plan area of a sedimentation tank, is generally called________________?

A: Over flow rate B: Surface loading C: Over flow velocity D: All the above

Q24 : For a body floating in a liquid the normal pressure exerted by the liquid acts at _________________?

A: bottom surface of the body B: e.g. of the body C: metacentre D: all points on the surface of the body

Q25 : Bernoulli equation deals with the law of conservation of____________________?

A: mass B: momentum C: energy D: work

Q26 : Units of surface tension are_________________?

A: energy/unit area B: distance C: both of the above D: it has no units

Q27 : Sewer ventilating columns are generally placed at_______________?

A: Distances 150 m to 300 m B: Upper ends of branch sewers C: Every change in the size of sewers D: All the above

Q28 : The vapour pressure over the concave surface is__________________?

A: less man the vapour pressure over the plane surface B: equal to the vapour pressure over the plane surface C: greater than the vapour pressure over the plane surface D: none of the above

Q29 : A one dimensional flow is one which___________________?

A: is uniform flow B: is steady uniform flow C: takes place in straight lines D: involves zero transverse component of flow

Q30 : A fluid in equilibrium can’t sustain_________________?

A: tensile stress B: compressive stress C: shear stress D: bending stress

Q31 : To avoid an interruption in the flow of a syphon, an air vessel is provided______________?

A: at the inlet B: at the outlet C: at the summit D: ay nay point between inlet and outlet

Q32 : The horizontal component of buoyant force is__________________?

A: negligible B: same as buoyant force C: zero D: non of these

Q33 : The total energy of each particle at various places in the case of perfect incompres sible fluid flowing in continuous sream________________?

A: keeps on increasing B: keeps on decreasing C: remains constant D: may increase/decrease

Q34 : Fluid is a substance which offers no resistance to change of_________________?

A: pressure B: flow C: shape D: temperature

Q35 : Kinematic viscosity is dependent upon________________?

A: pressure B: distance C: flow D: density

Q36 : Rain drops are spherical because of____________________?

A: viscosity B: air resistance C: surface tension forces D: atmospheric pressure

Q37 : In sewers the effect of scouring is more on__________________?

A: Top side B: Bottom side C: Horizontal side D: All sides

Q38 : The region between the separation streamline and the boundary surface of the solid body is known as_________________?

A: wake B: drag C: lift D: boundary layer

Q39 : Choose the wrong statement?

A: any weight, floating or immersed in a liquid, is acted upon by a buoyant force B: Buoyant force is equal to the weight of the liquid displaced C: The point through which buoyant force acts, is called the center of buoyancy D: Center of buoyancy is located above the center of gravity of the displaced liquid v

Q40 : A pressure of 25 m of head of water is equal to________________?

A: 25 kN/m2 B: 2500 kN/m2 C: 2.5kN/m2 D: 12.5 kN/m2

Q41 : The clarigesters are_________________?

A: Circular septic tanks B: Rectangular septic tanks C: Circular Imhoff double tanks with bottom hoppers D: Circular Imhoff double storey tanks without bottom hoppers

Q42 : The volumetric change of the fluid caused by a resistance is known as_________________?

A: volumetric strain B: volumetric index C: compressibility D: adhesion

Q43 : Ratio of inertia force to surface Jension is known as ________________________?

A: Mach number B: Froude number C: Reynold’s number D: Weber’s number

Q44 : The units of viscosity are__________________?

A: metres2 per sec B: kg sec/metre C: newton-sec per metre2 D: newton-sec per metre

Q45 : The upper surface of a weir over which water flows is known is________________?

A: crest B: nappe C: sill D: weir top

Q46 : The tendency of a liquid surface to contract is due to the following property_________________?

A: cohesion B: adhesion C: surface tension D: elasticity

Q47 : An ideal flow of any fluid must satisfy ___________________?

A: Pascal law B: Newton’s law of viscosity C: boundary layer theory D: continuity equation

Q48 : Bio-chemical oxygen demand (BOD) for the first 20 days in generally referred to_______________?

A: Initial demand B: First stage demand C: Carbonaceous demand D: All of these

Q49 : The specific weight of water is 1000 kg/m” _______________?

A: at normal pressure of 760 mm B: at 4°C temperature C: at mean sea level D: all the above

Q50 : Non uniform flow occurs when ____________________?

A: the direction and magnitude of the velocity at all points are identical B: the velocity of successive fluid par-ticles, at any point, is the same at suc-cessive periods of time C: the magnitude aricf direction of the velocity do not change from point to point in the fluid D: velocity, depth, pressure, etc. change from point to point in the fluid flow

Q51 : If 850 kg liquid occupies volume of one cubic meter, men 0.85 represents its_______________?

A: specific weight B: specific mass C: specific gravity D: specific density

Q52 : The rate of accumulation of sludge per person per year, is_______________________?

A: 10 litres B: 15 litres C: 20 litres D: 25 litres

Q53 : The use of coarse screens for the disposal of sewage, may be dispensed with by______________?

A: Comminutor B: Shredder C: Both A. and B. D: Neither A. nor B.

Q54 : An ideal flow of any fluid must fulfill the following______________?

A: Newton’s law of motion B: Newton’s law of viscosity C: Pascal’ law D: Continuity equation

Q55 : For pipes, turbulent flow occurs when Reynolds number is_________________?

A: less than 2000 B: between 2000 and 4000 C: more than 4000 D: less than 4000

Q56 : The resultant upward pressure of a fluid on a floating body is equal to the weight of the fluid displaced by the body. This definition is according to____________________?

A: Buoyancy B: Equilibrium of a floating body C: Archimedes’ principle D: Bernoulli’s theorem

Q57 : If the surface of liquid is convex, men_________________?

A: cohesion pressure is negligible B: cohesion pressure is increased C: there is no cohesion pressure D: there is no cohesion pressure

Q58 : If is the diameter of upper circular portion, the overall depth of New Egg shaped sewer section, Is_____________________?

A: 1.250 D B: 1.350 D C: 1.425 D D: 1.625 D

Q59 : Metacentric height is the distance between the metacentre and___________________?

A: water surface B: center of pressure C: center of gravity D: center of buoyancy

Q60 : The equation of continuity holds good when the flow __________________?

A: is steady B: is one dimensional C: velocity is uniform at all the cross sec-tions D: all of the above

Q61 : Normal depth in open channel flow is the depth of flow corresponding to_______________?

A: steady flow B: unsteady flow C: laminar flow D: uniform flow

Q62 : Operation of McLeod gauge used for low pressure measurement is based on the principle of_____________________?

A: gas law B: Boyle’s law C: Charle’s law D: Pascal’s law

Q63 : The grit and silt of the grit chambers, may not be used for_________________?

A: Raising low lying areas by dumping B: Concreting C: Both A. and B. D: Neither A. nor B

Q64 : In septic tanks__________________?

A: Free board of 0.3 m may be provided B: The baffles or tees are extended up to top level of scum C: The clear space between the baffle top and covering slab is about 7.5 cm D: All the above

Q65 : Pick up the correct statement from the following _________________?

A: The materials separated by screens, is called screenings B: The screenings are disposed off either by burning or by burial or by dumping C: The process of burning the screenings, is known as compositing D: All the above

Q66 : The spacing of bars of perforations of fine screens used for the treatment of sewage, is_______________?

A: 2 to 3 mm B: 3 to 5 mm C: 5 to 8 mm D: 8 to 10 mm

Q67 : In sewers designed with self cleansing velocity________________?

A: The bottom is silted B: The bottom is scoured C: Both silting and scouring occur at the bottom D: Neither silting nor scouring occurs at the bottom

Q68 : In order to increase sensitivity of U-tube manometer, one leg is usually inclined by angle 9. Sensitivity of inclined tube to sensitivity of U-tube is equal to_________________?

A: sin 9 B: sin 9 C: casS D: cos 9

Q69 : In areas where rainy season is limited to a few months, the type of sewerage system recommended is__________________?

A: Combined system B: Partially separate system C: Separate system D: None of these

Q70 : Select the correct statement ?

A: Local atmospheric pressure depends upon elevation of locality only B: Standard atmospheric pressure is the mean local atmospheric pressure a* sea level C: Local atmospheric pressure is always below standard atmospheric pressure D: A barometer reads the difference be-tween local and standard atmospheric pressure

Q71 : Working principle of dead weight pressure gauge tester is based on __________________?

A: Pascal’s law B: Dalton’s law of partial pressure C: Newton’s law of viscosity . D: Avogadro’s hypothesis

Q72 : A ship whose hull length is 100 m is to travel at 10 m/sec. For dynamic similarity, at what velocity should a 1:25 model be towed through water ?

A: 10 m/sec B: 25 m/sec C: 2 m/sec D: 50 m/sec

Q73 : A fluid is said to be ideal, if it is________________?

A: incompressible B: inviscous C: viscous and incompressible D: inviscous and incompressible

Q74 : Pick up the incorrect statement from the following?

A: The process of decomposing the organic matter under controlled anaerobic conditions, is called sludge digestion B: Sludge digestion is carried out in sludge tank C: The gases produced in sludge digestion process, contain 75% carbon dioxide D: The gases produced in sludge digestion process, contain 75% methane

Q75 : Total pressure on a lmxlm gate immersed vertically at a depth of 2 m below the free water surface will be ___________________?

A: 1000 kg B: 4000 kg C: 2000 kg D: 8000 kg

Q76 : Pick up the correct statement from the following?

A: The circular section of sewers provides maximum hydraulic mean depth B: The circular sewers are provided for separate sewerage system C: The circular sewers work efficiently if the sections run at least half full D: All the above

Q77 : The flow velocity in detritus tanks is________________?

A: 0.05 m/sec B: 0.09 m/sec C: 1.25 m/sec D: None of these

Q78 : The pH value of sewage is determined with the help of_________________?

A: Imhoff Cone B: Turbid meter C: Potentiometer D: None of these

Q79 : For a floating body to be in stable equilibrium, its metacentre should be_________________ ?

A: below the center of gravity B: below the center of buoyancy C: above the center of buoyancy D: above the center of gravity

Q80 : Pick up the correct statement from the following?

A: The boning rod is used for checking the levels of the sewer inverts B: Manhole covers are made circular for the convenience of the cleaning staff C: A manhole is classified as shallow manhole if its depth is less than 0.9 m D: All the above

Q81 : Metacentre is the point of intersection of _________________________?

A: vertical upward force through e.g. of body and center line of body B: buoyant force and the center line of body C: mid point between e.g. and center of buoyancy D: all of the above

Q82 : An odd shaped body weighing 7.5 kg and occupying 0.01 m3 volume will be completely submerged in a fluid having specific gravity of_________________?

A: 1 B: 1.2 C: 0.8 D: 0.75

Q83 : A square surface 3 m x 3 m lies in a vertical line in water pipe its upper edge at vater surface. The hydrostatic force on square surface is __________________?

A: 9,000 kg B: 13,500 kg C: 18,000 kg D: 27,000 kg

Q84 : In order that flow takes place between two points in a pipeline, the differential pressure between thes^ points must be more than_________________?

A: frictional force B: viscosity C: surface friction D: all of the above

Q85 : For measuring flow by a venturimeter, if should be installed in__________________?

A: vertical line B: horizontal line C: inclined line with upward flow D: in any direction and in any location

Q86 : The peoperty by virtue of which a liquid opposes relative motion between its different layers is called_________________?

A: surface tension B: co-efficient of viscosity C: viscosity D: osmosis

Q87 : A piece of metal of specific gravity 13.6 is placed in mercury of specific gravity 13.6, what fraction of it volume is under mercury ?

A: the metal piece will simply float over the mercury B: the metal piece will be immersed in mercury by half C: whole of the metal piece will be immersed with its top surface just at mercury level D: metal piece will sink to the bottom

Q88 : Mercury is often used in barometer because _________________?

A: it is the best liquid B: the height of barometer will be less C: its vapour pressure is so low that it may be neglected D: both B. and C.

Q89 : A drop manhole is provided if__________________?

A: A sewer drops from a height B: A branch sewer joins the main sewer at higher level C: A lamp is inserted to check obstruction D: None of these

Q90 : The units of kinematic viscosity are_______________?

A: metres2 per sec B: kg sec/meter C: newton-sec per meter D: newton-sec per meter

Q91 : Pick up the incorrect statement from the following?

A: The mixture of water and waste products, is called sewage B: The treated sewage effluents, are generally used for irrigating the crops C: The process of collecting, treating and disposing off the sewage, is called sewerage D: The old convergence system was definitely better than water carried sewerage system

Q92 : The amount of oxygen consumed by the aerobic bacterias which cause the aerobic biological decomposition of sewage, is known_________________?

A: Bio-Chemical Oxygen Demand (B.O.D.) B: Dissolved Oxygen (D.O.) C: Chemical Oxygen Demand (C.O.D.) D: None of these

Q93 : Steady flow occurs when____________________?

A: the direction and magnitude of the velocity at all points are identical B: the velocity of successive fluid par-ticles, at any point, is the same at suc-cessive periods of time C: the magnitude and direction of the velocity do not change from point to point in the fluid D: the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane

Q94 : Which of the following is dimensionless ________________?

A: specific weight B: specific volume C: specific speed D: specific gravity

Q95 : The atmospheric pressure with rise in altitude decreases____________________?

A: linearly B: first slowly and then steeply C: first steeply and then gradually D: unpredictable

Q96 : Two pipe systems can be said to be equivalent, when the following quantites are same______________?

A: friction loss and flow B: length and diameter C: flow and length D: friction factor and diameter

Q97 : The resultant upward pressure of the fluid on an immersed body is called_________________?

A: upthrust B: buoyancy C: center of pressure D: all the above are correct

Q98 : Pick up the incorrect statement from the following for allowing workers to enter sewers_______________?

A: The particular manhole and one manhole on upstream and one manhole on downstream should remain open for 30 minutes B: Proper tests for the presence of poisonous gases must be carried out C: The men entering the manhole should be advised to smoke in the sewer D: Warning signals should be erected

Q99 : The detention time of a circular tank of diameter d and water depth H, for receiving the sewage Q per hour, is________________?

A: d² (0.011d + 0.785H)/Q B: d (0.022d + 0.085H)/Q C: d (0.785d + 0.011H)/Q D: d (0.285d + 0.011H)/Q

Q100 : If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.2 kg/cm”, the pressure at a depth of 50 m below the oil surface will be _____________________?

A: 2 meters of water column B: 3 meters of water column C: 5 meters of water column D: 6 meters of water Column

Free Civil Engineering MCQs Mock Test Online with Answers

Time to prove what you know!

LAT Test

GAT Test

Contact Info

Free Civil Engineering MCQs Mock Test Online with Answers

Subscribe our Newsletter

LAT Test

GAT Test

Contact Info