Free Civil Engineering MCQs Mock Test Online with Answers

Q1 : 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

Q2 : Pitot tube is used for measurement of__________________?

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

Q3 : 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

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 : 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

Q6 : 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

Q7 : 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

Q8 : 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

Q9 : 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

Q10 : 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

Q11 : Two dimensional 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

Q12 : 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

Q13 : Specific weight of sea water is more that of pure water because it contains ________________?

A: dissolved air B: dissolved salt C: suspended matter D: all of the above

Q14 : 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

Q15 : 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

Q16 : 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

Q17 : A large Roynold number is indication of_________________?

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

Q18 : Pressure of the order of 10″‘ torr can be measured by_______________ ?

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

Q19 : 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

Q20 : 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

Q21 : Which of the following manometer has highest sensitivity __________________?

A: U-tube with water B: inclined U-tube C: U-tube with mercury D: micro-manometer with water

Q22 : 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

Q23 : The tendency of a liquid surface to contract is due to the following property_________________?

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

Q24 : 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

Q25 : 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

Q26 : 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

Q27 : The ratio of the diameter of a circular section and the side of a square section hydraulically equivalent, is____________________?

A: 1.095 B: 1.085 C: 1.075 D: 1.065

Q28 : 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

Q29 : 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

Q30 : 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

Q31 : Hazen’s formula VS = 418 (GS – Gw)d [(3T + 70)/100] is used for the settlement velocity of the particles of diameter______________________?

A: Less than 0.01 mm B: Less than 0.05 mm C: Less than 0.1 mm D: Greater than 0.1 mm

Q32 : At the centre line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be_______________?

A: minimum B: maximum C: zero D: could be any value

Q33 : 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

Q34 : The value of mass density in kgsecVm4 for water at 0°C is_______________?

A: 1 B: 1000 C: 100 D: 101.9

Q35 : 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

Q36 : Water content of sewage is about___________________?

A: 90 % B: 95 % C: 99 % D: 9.9 %

Q37 : 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

Q38 : If the flame of a miner’s safety lamp in a manhole extinguishes within 5 minutes, the sewer certainly contains_______________?

A: Hydrogen sulphide B: Carbon dioxide C: Methane D: Oxygen

Q39 : True one-dimensional flow occurs when___________________?

A: the direction and magnitude of the veiocity 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

Q40 : 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

Q41 : The volumetric change of the fluid caused by a resistance is known as_________________?

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

Q42 : 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

Q43 : 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

Q44 : 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

Q45 : 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

Q46 : Rain drops are spherical because of____________________?

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

Q47 : Dimensions of surface tension are_________________?

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

Q48 : 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

Q49 : 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

Q50 : A metal with specific gravity of o floating in a fluid of same specific gravity a will___________________?

A: sink to bottom B: float over fluid C: partly immersed D: be fully immersed with top surface at fluid surface

Q51 : The sewage treatment units in which anaerobic decomposition of organic matter is used, are called________________?

A: Imhoff tanks B: Trickling filters C: Sludge sedimentation tanks D: None of these

Q52 : 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

Q53 : 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

Q54 : 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

Q55 : Cavitation is caused by___________________?

A: high velocity B: high pressure C: weak material D: low pressure

Q56 : 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

Q57 : 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″

Q58 : 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

Q59 : 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

Q60 : 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

Q61 : The moisture content of sludge is reduced from 90% to 80% in a sludge digestion tank. The percentage decrease in the volume of sludge, is_______________?

A: 25 % B: 50 % C: 10 % D: 5 %

Q62 : The property of a fluid which enables it to resist tensile stress is known as________________?

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

Q63 : The time oscillation of a floating body with increase in metacentric height will be________________?

A: same B: higher C: lower D: lower/higher depending on weight of body

Q64 : 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

Q65 : Metacentric height is given as the distance between_______________?

A: the center of gravity of the body andthe meta center B: the center of gravity of the body and the center of buoyancy C: the center of gravity of the body and the center of pressure D: center of buoyancy and metacentre

Q66 : 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

Q67 : Ratio of inertia force to elastic force is known as _____________________?

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

Q68 : 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

Q69 : 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

Q70 : Mach number is significant in___________________?

A: supersonics, as with projectiles 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 force, and wave making effects, as with ship’s hulls D: none of the above

Q71 : 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

Q72 : Dynamic viscosity of most of the liquids with rise in temperature____________________?

A: increases B: decreases C: remains unaffected D: unpredictable

Q73 : 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

Q74 : 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.

Q75 : 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

Q76 : Center of pressure on an inclined plane is______________________?

A: at the centroid B: above the centroid C: below the centroid D: at metacentre

Q77 : The horizontal component of buoyant force is__________________?

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

Q78 : Flow occurring in a pipeline when a valve is being opened is ______________________?

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

Q79 : 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

Q80 : 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

Q81 : All the terms of energy in Bernoulli’s equation have dimension of_______________?

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

Q82 : A bucket of water is hanging from a spring balance. An iron piece is suspended into water without touching sides of bucket from another support. The spring balance reading will__________________?

A: increase B: decrease C: remain same D: increase/decrease depending on depth of immersion

Q83 : 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.

Q84 : 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

Q85 : 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

Q86 : 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

Q87 : 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

Q88 : A balloon lifting in air follows the following principle_________________?

A: law of gravitation B: Archimedes principle C: principle of buoyancy D: all of the above

Q89 : The angle of contact in case of a liquid depends upon____________________?

A: the nature of the liquid and the solid B: the material which exists above the free surface of the liquid C: both of die above D: none of die above

Q90 : 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

Q91 : 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

Q92 : To maintain aerobic biological activity, the moisture content of the compost mass should be about_________________?

A: 45 % B: 50 % C: 55 % D: 60 %

Q93 : During the opening of a valve in a pipe line, the flow is___________________?

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

Q94 : Pick up the correct statement from the following?

A: Indore method of composting involves decomposition under aerobic conditions B: Bangalore method of composting involves decomposing under anaerobic conditions C: Fully stabilised refuse by the Bangalore method of compositing is a powdery mass called humus D: all of these

Q95 : 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

Q96 : A perfect gas_________________?

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

Q97 : 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

Q98 : 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

Q99 : If no resistance is encountered by displacement, such a substance is known as___________________?

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

Q100 : Choose the wrong statement________________?

A: Viscosity of a fluid is that property which determines the amount of its resistance to a shearing force B: Viscosity is due primarily to interaction between fluid molecules C: Viscosity of liquids decreases with in-crease in temperature D: Viscosity of liquids is appreciably affected by change in pressure

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