Free Civil Engineering MCQs Mock Test Online with Answers

Q1 : 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

Q2 : Imhoff cone is used to measure________________?

A: Total organic solids B: Total solids C: Total in organic solids D: Settleable solids

Q3 : The flow in which each liquid particle has a definite path and their paths do not cross each other is called____________________?

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

Q4 : 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

Q5 : pH value of sludge during alkaline regression stage, is__________________?

A: More than 7 B: Less than 7 C: Less than 6 D: More than 6

Q6 : If q is the average sewage flow from a city of population P, the maximum sewage flow______________?

A: Q = [(4 + )/(18 + )] q B: Q = [(18 + P)/(4 + )] q C: Q = [(18 + )/(4 + )] q D: Q = [(5 + )/((15 + )] q

Q7 : At the junction of sewers___________________?

A: Top of smaller sewer is kept lower B: Top of larger sewer is kept lower C: Tops of both the sewers are at the same level D: None of these

Q8 : The buoyancy depends on__________________?

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

Q9 : Capillary action is due to the__________________?

A: surface tension B: cohesion of the liquid C: adhesion of the liquid molecules and the molecules on the surface of a solid D: all of the above

Q10 : Pressure of the order of 10″‘ torr can be measured by_______________ ?

A: Bourdon tube B: Pirani Gauge C: micro-manometer D: ionisastion gauge

Q11 : In the case of steady flow of a fluid, the acceleration of any fluid particle is__________________?

A: constant B: variable C: zero D: zero under limiting conditions

Q12 : The line of action of the buoyant force acts through the centroid of the ___________________?

A: submerged body B: volume of the floating body C: volume of the fluid vertically above the body D: displaced volume of the fluid

Q13 : Newton’s law of viscosity is a relationship between________________?

A: shear stress anctthejiate of angular distortion B: shear stress and viscosity C: shear stress, velocity and viscosity D: pressure, velocity and viscosity

Q14 : The normal value of over flow rates for plain primary sedimentation tanks, 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 : 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

Q16 : Resultant pressure of the liquid in the case of an immersed body acts through _________________?

A: center of gravity B: center of pressure C: center of buoyancy D: in between e.g. and center of pressure

Q17 : The increase of temperature results in_________________?

A: increase in viscosity of liquid B: increase in viscosity of gas C: decrease in viscosity of gas D: decrease in viscosity of liquid

Q18 : 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

Q19 : All the terms of energy in Bernoulli’s equation have dimension of_______________?

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

Q20 : 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

Q21 : 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

Q22 : The flow in which the velocity vector is identical in magnitude and direction at every point, for any given instant, is known as___________________?

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

Q23 : An inverted siphon is designed generally for____________________?

A: One pipe B: Two pipes C: Three pipes D: Four pipes

Q24 : The difference of pressure between the inside and outside of a liquid drop is________________?

A: .p = Txr B: p = T/r C: p = T/2r D: p = 2T/r

Q25 : 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

Q26 : 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

Q27 : 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

Q28 : A fluid in equilibrium can’t sustain_________________?

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

Q29 : The flow in which the particles of a fluid attain such velocities that vary from point to point in magnitude and direction as well as from instant to instant, is known as_________________?

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

Q30 : Which of the following is the unit of kinematic viscosity _________________?

A: pascal B: poise C: stoke D: faraday

Q31 : The velocity of jet of water travelling out of opening in a tank filled with water is proportional to___________________?

A: head of water (h) B: h2 C: V/T D: h3/1.

Q32 : In sewers the velocity of flow should not be_________________?

A: More than the self-cleansing velocity B: Less than the self-cleansing velocity C: Less than 10 m/sec D: More than 20 m/sec

Q33 : The continuity equation is connected with_______________?

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

Q34 : When the flow parameters at any given instant remain same at every point, then flow is said to be____________________?

A: quasi static B: steady state C: uniform D: static.

Q35 : 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

Q36 : 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

Q37 : Bernoulli equation deals with the law of conservation of____________________?

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

Q38 : Flow occurring in a pipeline when a valve is being opened is ______________________?

A: steady B: unsteady C: laminar D: vortex

Q39 : Uniform flow occurs when___________________?

A: the direction and magnitude of the velocity at all points are identical B: the velocity of successive fluid pai-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 plsr.e

Q40 : Cavitation will begin when______________________?

A: the pressure at any location reaches an absolute pressure equal to the saturated vapour pressure of the liquid B: pressure becomes more than critical pressure C: flow is increased D: pressure is increased

Q41 : 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

Q42 : For manometer, a better liquid combination is one having______________?

A: higher surface tension B: lower surface tension C: surface tension is no criterion D: low density and viscosity

Q43 : Principle of similitude forms the basis of__________________?

A: comparing two identical equipments B: designing models so that the result can be converted to prototypes C: comparing similarity between design and actual equipment D: hydraulic designs

Q44 : 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

Q45 : 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

Q46 : 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

Q47 : The factor responsible for purification of sewage in river is________________?

A: Hydrology B: Dissolved oxygen in water C: Temperature D: All the above

Q48 : A sewer running partially full and hurried with back filled, fails in compression due to_________________?

A: Weight of the pipe B: Weight of the back fill C: Superimposed traffic loads D: All the above

Q49 : Flow of water in a pipe about 3 meters in diameter can be measured by_________________?

A: orifice plate B: venturi C: rotameter D: pitot tube

Q50 : A model of torpedo is tested in a towing tank at a velocity of 25 m/sec. The prototype is expected to attain a velocity of 5 m/sec. What model scale has been used ?

A: 1 : 5 B: 1 : 2.5 C: 1 :25 D: 1:V5″

Q51 : A piece of metal of specific gravity 7 floats in mercury of specific gravity 13.6. What fraction of its volume is under mercury ?

A: 0.5 B: 0.4 C: 0.515 D: none of the above

Q52 : A piece of wood having weight 5 kg floats in water with 60% of its volume under the liquid. The specific gravity of wood is__________________?

A: 0.83 B: 0.6 C: 0.4 D: none of the above

Q53 : Pick up the in-correct statement from the following?

A: Manholes are provided in sewer pipes at suitable intervals B: Catch basins are generally provided in sewers for carrying drainage discharge C: Inlets are generally provided in all sewers D: None of these

Q54 : 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

Q55 : The layers of vegetable wastes and night soil alternatively piled above the ground to form a mound, is called_______________?

A: A heap B: Plateau C: Windrow D: None of these

Q56 : Poise is the unit of________________?

A: surface tension B: capillarity C: viscosity D: shear stress in fluids

Q57 : 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

Q58 : Stone ware pipes are_______________?

A: Highly resistant to sulphide corrosion B: Highly impervious C: Hydraulically efficient because of their smooth interior surface D: Especially suited to pressure pipes

Q59 : Dilution method of disposing of sewage, is not preferred to_______________?

A: When sewage is fresh B: When diluting water has high dissolved oxygen content C: When diluting water is used for water supply near the point of sewage disposed D: When the diluting water is having flow currents

Q60 : 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

Q61 : Alcohol is used in manometers because_____________________?

A: it has low vapour pressure B: it is clearly visible C: it has low surface tension D: it can provide longer column due to low density

Q62 : 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

Q63 : 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

Q64 : 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

Q65 : The center of pressure of a surface subjected to fluid pressure is the point____________________?

A: on the surface at which resultant pres-sure acts B: on the surface at which gravitational force acis C: at which all hydraulic forces meet D: similar to metacentre

Q66 : The rise or depression of liquid in a tube due to surface tension wim increase in size of tube will_______________?

A: increase B: remain unaffected C: may increase or decrease depending on the characteristics of liquid D: decrease

Q67 : Metacentric height is the distance between the metacentre and___________________?

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

Q68 : The minimum width of the fire escape stairs shall be?

A: 1.00 m B: 1.5 m C: 2.0 m D: 1.25 m

Q69 : The total pressure on the surface of a vertical sluice gate 2 m x 1 m with its top 2 m surface being 0.5 m below the water level will be___________________?

A: 500 kg B: 1000 kg C: 1500 kg D: 2000 kg

Q70 : The pressure at a point in a fluid will not be same in all the directions when the fluid is________________?

A: moving B: viscous C: viscous and static D: viscous and moving

Q71 : The resultant of all normal pressures acts_________________?

A: at e.g. of body B: at center of pressure C: vertically upwards D: at metacentre

Q72 : In a residential colony, sewers of diameters 100 mm, 150 mm and 225 mm were laid with a gradient 1 in 120. Which portion of the sewage system does not choke in due course of time?

A: 100 mm dia. B: 150 mm dia. C: 225 mm dia. D: All of these

Q73 : Which of the following instrument can be used for measuring speed of a submarine moving in deep sea_________________?

A: Venturimeter B: Orifice plate C: hot wire anemometer D: pitot tube

Q74 : If D is the diameter of a circular sewer and D’ is the top horizontal diameter of an equivalent egg shaped section, the relationship which holds good, is_______________?

A: D’ = 0.64 D B: D’ = 0.74 D C: D’ = 0.84 D D: D’ = 0.94 D

Q75 : The pressure in Pascals at a depth of 1 m below the free surface of a body of water will be equal to________________?

A: 1 Pa B: 91Pa C: 981 Pa D: 9810 Pa

Q76 : If w is the specific weight of liquid and k the depth of any point from the surface, then pressure intensity at that point will be____________________?

A: h B: wh C: w/h D: h/w

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 : 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

Q79 : 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

Q80 : 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

Q81 : The surface tension of mercury at normal temperature compared to that of water is____________________?

A: more B: less C: same D: more or less depending on size of glass tube

Q82 : The center of gravity of the volume of the liquid displaced by an immersed body is called________________?

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

Q83 : Choose the wrong statement ?

A: The center of buoyancy is located at the center of gravity of the displaced liquid B: For stability of a submerged body, the center of gravity of body must lie directly below the center of buoyancy C: If e.g. and center of buoyancy coincide, the submerged body must lie at neutral equilibrium for all positions D: All floating bodies are stable

Q84 : Dimensions of surface tension are_________________?

A: MlL°T2 B: MlL°Tx C: MlL2T2 D: MlL°t

Q85 : If 2% solution of a sewage sample is incubated for 5 days at 20°C and depletion of oxygen was found to be 5 ppm, B.O.D. of the sewage is____________________?

A: 200 ppm B: 225 ppm C: 250 ppm D: None of these

Q86 : Surface tension _____________________?

A: acts in the plane of the interface normal to any line in the surface B: is also known as capillarity C: is a function of the curvature of the interface D: decreases with fall in temperature

Q87 : The units of dynamic or absolute viscosity are_______________?

A: metres2 per sec B: kg sec/meter C: newton-sec per meter D: newton-sec2 per meter

Q88 : 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

Q89 : Nitrogen cycle of sewage, is____________________?

A: Liberation of ammonia-formation of nitrites-formation of nitrates-liberation of nitrogen B: Liberation of nitrogen-liberation of ammonia-formation of nitrites- formation of nitrates C: Liberation of nitrogen-formation of nitrates-formation of nitrites-liberation of ammonia D: Formation of nitrates-formation of nitrites-liberation of nitrates-liberation of nitrates

Q90 : If the diameter of a sewer is 150 mm, the gradient required for generating self cleansing velocity, is________________?

A: 1 in 60 B: 1 in 100 C: 1 in 120 D: None of these

Q91 : Property of a fluid by which its own molecules are attracted is called ________________?

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

Q92 : The pressure in the air space above an oil (sp. gr. 0.8) surface in a tank is 0.1 kg/cm”. The pressure at 2.5 m below the oil surface will be ___________________?

A: 2 meters of water column B: 3 meters of water column C: 3.5 meters of water column D: 4 m of water column

Q93 : A streamline is defined as the line ________________?

A: parallel to central axis flow B: parallel to outer surface of pipe C: of equal yelocity in a flow D: along which the pressure drop is uniform

Q94 : A liquid would wet the solid, if adhesion forces as compared to cohesion forces are_________________?

A: less B: more C: equal D: less at low temperature and more at high temperature

Q95 : Drop manholes are the manholes___________________?

A: Without entry ladders B: Without manhole covers C: With depths more than 3.5 m D: Having drains at different levels

Q96 : Falling drops of water become spheres due to the property of ________________?

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

Q97 : A body floats in stable equilibrium________________?

A: when its meatcentric height is zero B: when the metancentre is above e.g C: when its e.g. is below it’s center of buoyancy D: metacentre has nothing to do with position of e.g. for determining stability

Q98 : The tendency of a liquid surface to contract is due to the following property_________________?

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

Q99 : The upper surface of a weir over which water flows is known is________________?

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

Q100 : Hydrometer is used to determine________________?

A: specific gravity of liquids B: specific gravity of solids C: specific gravity of gases D: relative humidity

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