Free Civil Engineering MCQs Mock Test Online with Answers

Q1 : The density of water is 1000 kg/m3 at __________________?

A: 0°C B: 0°K C: 4°C D. 20°C D: all temperature

Q2 : 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

Q3 : For detecting the nitrates in sewage, the colour may be developed by adding________________?

A: Potassium permanganate B: Sulphuric acid and napthamine C: Phenol-di -sulphuric acid and potassium hydroxide D: None of these

Q4 : 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

Q5 : In an isothermal atmosphere, the pressure__________________?

A: decreases linearly with elevation B: remains constant C: varies in the same way as the density D: increases exponentially with elevation

Q6 : Falling drops of water become spheres due to the property of ________________?

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

Q7 : 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

Q8 : 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

Q9 : 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

Q10 : The tendency of a liquid surface to contract is due to the following property_________________?

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

Q11 : 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.

Q12 : Pitot tube is used for measurement of__________________?

A: pressure B: flow C: velocity D: dsscharge

Q13 : 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

Q14 : The value of the coefficient of compressibility for water at ordinary pressure and temperature in kg/cm is equal to _________________?

A: 1000 B: 21,000. C: 2700 D: 10,000

Q15 : 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

Q16 : Liquids transmit pressure equally in all the directions. This is according to_________________?

A: Boyle’s law B: Archimedes principle C: Pascal’s law D: Newton’s formula

Q17 : The water carried sewerage system removes__________________?

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

Q18 : Poise is the unit of________________?

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

Q19 : 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

Q20 : The pH value of sewage is determined with the help of_________________?

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

Q21 : All the terms of energy in Bernoulli’s equation have dimension of_______________?

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

Q22 : The property of fluid by virtue of which it offers resistance to shear is called____________________?

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

Q23 : The depth of the center of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is ______________________?

A: 2.4 m B: 3.0 m C: 4.0 m D: ”2.5 m

Q24 : The capillary rise at 20°C in a clean glass tube of 1 mm bore containing water is ap-proximately_______________?

A: 1 mm B: 5 mm C: 10 mm D: 30 mm

Q25 : Surface tension has the units of____________________?

A: newtons/m B: newtons/m C: new tons/m D: newtons

Q26 : 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

Q27 : 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

Q28 : 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

Q29 : A liquid compressed in cylinder has a volume of 0.04 m3 at 50 kg/cm2 and a volume of 0.039 m3 at 150 kg/cm2. The bulk modulus of elasticity of liquid is _________________?

A: 400 kg/cm2 B: 4000 kg/cm2 C: 40 x 105 kg/cm2 D: 40 x 106 kg/cm2

Q30 : 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

Q31 : The resultant of all normal pressures acts_________________?

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

Q32 : 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

Q33 : Dimensions of surface tension are_________________?

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

Q34 : 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

Q35 : The property of a fluid which enables it to resist tensile stress is known as________________?

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

Q36 : 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

Q37 : 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

Q38 : In a fully mechanised composting plant, involves________________?

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

Q39 : 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

Q40 : 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

Q41 : A perfect gas_________________?

A: has constant viscosity B: has zero viscosity C: is incompressible D: none of the above

Q42 : 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

Q43 : Assertion A.: A free board of 0.3 m is provided above the top sewage line in septic tanks. Reason (R): It helps to accommodate the scum in the septic tank_________________?

A: Both A and R is true and R is the correct explanation of A B: Both A and R is true but R is not a correct explanation of A C: A is true but R is false D: A is false but R is true

Q44 : The volumetric change of the fluid caused by a resistance is known as_________________?

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

Q45 : The fluid forces considered in the Navier Stokes equation are__________________?

A: gravity, pressure and viscous B: gravity, pressure and turbulent C: gravity, viscous and turbulent D: none of the above

Q46 : 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

Q47 : The gas which may cause explosion in sewers, is_________________?

A: Carbondioxide B: Methane C: Ammonia D: Carbon monoxide

Q48 : Fluid is a substance which offers no resistance to change of_________________?

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

Q49 : Rain drops are spherical because of____________________?

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

Q50 : The buoyancy depends on__________________?

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

Q51 : An object having 10 kg mass weighs 9.81kg on a spring balance. The value of ‘g’ at this place is___________________?

A: 10m/sec2 B: 9.81 m/sec2 C: 10.2/m sec D: 9.75 m/sec2

Q52 : Practical fluids____________________?

A: are viscous B: possess surface tension C: are compressible D: possess all the above properties

Q53 : 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

Q54 : The minimum diameter of a sewer is kept __________________?

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

Q55 : Buoyant force is___________________?

A: resultant force acting on a floating body B: equal to the volume of liquid displaced C: force necessary to keep a body in equilibrium D: the resultant force on a body due to the fluid surrounding it

Q56 : 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

Q57 : If mercury in a barometer is replaced by water, the height of 3.75 cm of mercury will be following cm of water___________________?

A: 51 cm B: 50 cm C: 52 cm D: 51.7 cm

Q58 : 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

Q59 : Density of water is maximum at ___________________?

A: 0°C B: 0°K C: 4°C D: 100°C

Q60 : Choose the wrong statement?

A: fluids are capable of flowing B: fluids conform to the shape of the con-taining vessels C: when in equilibrium, fluids cannot sustain tangential forces D: when in equilibrium, fluids can sustain shear forces

Q61 : 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

Q62 : The bulk modulus of elasticity __________________?

A: has the dimensions of 1/pressure B: increases with pressure C: is large when fluid is more compressible D: is independent of pressure and viscosity

Q63 : 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

Q64 : 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

Q65 : When a body floating in a liquid, is displaced slightly, it oscillates about ___________________?

A: e.g. of body B: center of pressure C: center of buoyancy D: metacentre

Q66 : 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

Q67 : Pick up the correct statement from the following ?

A: Turbidity is more in strong sewage B: The black colour indicates septic sewage C: The sewage omits offensive odours after four hours D: All the above

Q68 : 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

Q69 : During the opening of a valve in a pipe line, the flow is___________________?

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

Q70 : For a floating body to be in equilibrium __________________?

A: meta center should be above e.g. B: center of buoyancy and e.g. must lie on same vertical plane C: a righting couple should be formed D: all of the above

Q71 : The upper surface of a weir over which water flows is known is________________?

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

Q72 : 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

Q73 : A piece weighing 3 kg in air was found to weigh 2.5 kg when submerged in water. Its specific gravity is__________________?

A: 1 B: 6 C: 5 D: 7

Q74 : 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

Q75 : The atmospheric pressure with rise in altitude decreases____________________?

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

Q76 : A large Roynold number is indication of_________________?

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

Q77 : The resultant upward pressure of the fluid on an immersed body due to its tendency to uplift the sub-merged body is called___________________?

A: upthrust B: reaction C: buoyancy D: metacentre

Q78 : 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

Q79 : In circular sewers if depth of flow is 0.2 times the full depth, the nominal gradient,______________?

A: Is only provided B: Is doubled C: Is trebled D: Is not enough

Q80 : A hydraulic press has a ram of 15 cm diameter and plunger of 1.5 cm. It is required to lift a weight of 1 tonne. The force required on plunger is equal tc__________________?

A: 10 kg B: 100 kg C: 1000 kg D: 1 kg

Q81 : 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

Q82 : Froude number is significant in____________________?

A: supersonics, as with projectile and jet propulsion B: full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc. C: simultaneous motion through two fluids where there is a surface of dis-continuity, gravity forces, and wave making effect, as with ship’s hulls D: all of the above

Q83 : 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

Q84 : Pick up the correct statement from the following?

A: Inlets are provided on the road surface at the lowest point for draining rain water B: Inlets are generally provided at an interval of 30 m to 60 m along straight roads C: Inlets having horizontal openings, are called horizontal inlets D: All the above

Q85 : 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

Q86 : According to the principle of buoyancy a body totally or partially immersed in a fluid will be lifted up by a force equal to __________________?

A: the weight of the body B: more than the weight of the body C: less than the weight of the body D: weight of the fluid displaced by the body

Q87 : 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

Q88 : If no resistance is encountered by displacement, such a substance is known as___________________?

A: fluid B: water C: gas D: ideal fluid

Q89 : 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

Q90 : 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

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

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

Q92 : Units of surface tension are_________________?

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

Q93 : 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

Q94 : 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

Q95 : For pipes, laminar flow occurs when Roynolds number is__________________?

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

Q96 : 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

Q97 : The conditions for the stable equilibrium of a floating body are_______________?

A: the meta-center should lie above the center of gravity B: the center of buoyancy and the center of gravity must lie on the same vertical line C: a righting couple should be formed D: all the above are correct

Q98 : 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

Q99 : Differential monometer is used to measure _______________________?

A: pressure in pipes, channels etc. B: atmospheric pressure C: very low pressure D: difference of pressure between two points

Q100 : Antisyphonage pipe is fitted_______________?

A: At the end of septic tanks B: On manholes C: With a W.C. trap D: At the beginning of sewer line

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