Public Health Engineering MCQ Questions and Answers in Civil Engineering

Question. The open wells or dug wells ?
a) act as a small storage reservoir
b) are suitable for a small discharge all of
c) are cheap in construction
d) all of these

Answer : D

Question. The water obtained from is generally known as underground water ?
a) infiltration galleries
b) springs
c) rivers
d) wells

Answer : B

Question. The finely divided dispersion of solid particles which are not visible to the naked eye and cannot be removed by ordinary filters are known as ?
a) suspended impurities
b) dissolved impurities
c) colloidal impurities
d) none of these

Answer : C

Question. The continuous flow of water may be expected from ?
a) surface springs
b) artesian springs
c) gravity springs
d) all of these

Answer : B

Question. The presence of .................causes red colour in water ?
a) iron
b) manganese
c) sodium fluoride
d) calcium carbonate

Answer : A

Question. Run-off is the water which flows ?
a) in infiltration galleries
b) in sewer pipes
c) due to leakage of pipes
d) in rivers

Answer : D

Question. Which of the following statement is wrong ?
a) The quality of tube well water is better than that of surface source
b) The discharge of tube well is more than that of an open well
c) The tube well should not derive water from the first previous strata
d) none of the above

Answer : D

Question. The water supply system means ?
a) the entire scheme of collection and disposal of liquid waste
b) the complete layout from the source of supply to the distribution
c) construction of reservoirs
d) construction of canals

Answer : B

Question. pH value is a symbol for .......... concentration ?
a) magnesium
b) hydrogen
c) calcium
d) sodium

Answer : B

Question. The horizontal tunnels constructed at shallow depths along the banks of a river to intern ground water table are called ?
a) canals
b) infiltration galleries
c) springs
d) lakes

Answer : B

Question. The presence of calcium and magnesium chloride in water causes ?
a) softening
b) bad taste
c) hardness
d) turbidity

Answer : C

Question. The colour of water is expressed in numbers of a ?
a) silica scale
b) platinum cobalt scale
c) po value
d) none of these

Answer : B

Question. Which of the following belongs to homologous series of alkynes C6H6, C2H6, C2H4, C3H4 ?
a) C2H6
b) C2H4
c) C3H4
d) C6H6

Answer : C

Question. High turbidity of water can be determined by ?
a) turbidity tube
b) Jacksons turbidimeter
c) Baylis turbidimeter
d) Hellipe turbidimeter

Answer : B

Question. The most common cause of acidity in water is ?
a) hydrogen
b) oxygen
c) carbon dioxide
d) all of these

Answer : C

Question. The maximum permissible colour for domestic supplies, on platinum cobalt scale is ?
a) 5 to 10 ppm
b) 10 to 20 ppm
c) 20 to 30 ppm
d) 30 to 40 ppm

Answer : B

Question. The water mains should be designed for .......... of the average daily water requirement ?
a) 100%
b) 150%
c) 225%
d) 250 %

Answer : C

Question. The sodium carbonate in water ?
a) causes bad taste
b) softens the water
c) increases hardness of water
d) stops epidemic

Answer : B

Question. Which of the following statement is correct ?
a) The rate of silting in a reservoir is more in the beginning and less in the end
b) At the economical height of a dam, its cost per million cubic metre of storage is minimum
c) The percentage of water required for public use amounts to about 10% of the total water requirements
d) all of the above

Answer : D

Question. The yield of a underground source may be obtained by ?
a) pumping test
b) recupating test
c) both (a) and (b)
d) none of these

Answer : C

Question. Odours and tastes may result due to the presence of ?
a) micro-organisms either dead or alive
b) dissolved gases such as oxygen, carbon dioxide, methane etc
c) mineral substances such as sodium chloride, iron compounds etc
d) all of the above

Answer : D

Question. The water of a river has an important property called ?
a) turbidity
b) self purification
c) permeability
d) infiltration capacity

Answer : B

Question. A pipe sunk into the ground to tap the underground water is called ?
a) open well
b) tube well
c) artesian well
d) infiltration well

Answer : B

Question. The formula, F = R - K(1.8T + 32) for obtaining the annual run-off is known as ?
a) Justin's formula
b) Vermule's formula
c) Inglis formula
d) Khosla's formula

Answer : D

Question. Colloidal impurities if associated with organic matter having bacterias becomes the chief source of ?
a) hardness
b) epidemic
c) alkalinity
d) bad taste

Answer : B

Question. According to Indian standards, 45 litres of water per person per day is provided in case of ?
a) hotels
b) hostels
c) offices
d) all of these

Answer : C

Question. The maximum permissible chloride content in water for domestic supplies should not exceed ?
a) 250 ppm
b) 350 ppm
c) 450 ppm
d) 550 ppm

Answer : A

Question. The quantity of water available from an infiltration gallery depends upon the ?
a) size of gallery
b) nature of soil
c) yield of source
d) all of these

Answer : D

Question. The yield of the well is measured in ?
a) cum/h
b) litres/h
c) either (a) or (b)
d) none of these

Answer : C

Question. The maximum permissible total solid content in water for domestic purposes should not exceed ?
a) 300 ppm
b) 400 ppm
c) 500 ppm
d) 1000 ppm

Answer : C

Question. The most important source of water for public water supply is ?
a) lake
b) pond
c) river
d) sea

Answer : D

Question. When in the previous strata, the surface of water surrounding the well is at atmospheric pressure, well is known as ?
a) gravity well
b) artesian well
c) open well
d) deep well

Answer : A

Question. In India, as per Indian standards, water consumption per capita per day for domestic purpose is ?
a) 85 litres
b) 100 litres
c) 115 litres
d) 135 litres

Answer : D

Question. The domestic use of water amounts to ............ of the total water requirements per capita per ?
a) 20%
b) 30%
c) 40%
d) 50%

Answer : D

Question. The earth's water circulatory system is known as ?
a) water cycle
b) hydrological cycle
c) precipitation cycle
d) all of these

Answer : B

Question. The maximum permissible temperature for domestic supply is ?
a) 5 to 10°C
b) 10 to 15°C
c) 15 to 20°C
d) 20 to 25°C

Answer : B

Question. According to Indian standards, the consumption of water per capita per day for nursing homes, boarding schools and hostels is ?
a) 85 litres
b) 100 litres
c) 115 litres
d) 135 litres

Answer : D

Question. The maximum permissible turbidity for domestic supplies, on silica scale is ?
a) 5 to 10 ppm
b) 10 to 20 ppm
c) 20 to 30 ppm
d) 30 to 40 ppm

Answer : A

Question. The maximum permissible quantity of iron and manganese in water for domestic purposes should be ?
a) 0.1 ppm
b) 0.3 ppm
c) 0.6 ppm
d) 0.8 ppm

Answer : B

Question. The presence of sodium chloride in water ?
a) causes bad taste
b) softens the water
c) increases hardness of water
d) stops epidemic

Answer : B

Question. Which of the following statement is correct ?
a) If the pH value of water is equal to 7, the water is said to be neutral
b) The pH value determines the strength of the acid or alkali in water
c) The pH value of water can be obtained by a potentiometer
d) all of the above

Answer : D

Question. The presence of bacteria in water causes ?
a) hardness
b) alkalinity
c) diseases
d) bad taste

Answer : C

Question. The vertical wells provided along the banks of a river to draw ground water in dry season are called ?
a) open wells
b) tube wells
c) artesian wells
d) infiltration wells

Answer : D

Question. When lead is present in water, it ?
a) changes its colour
b) causes turbidity
c) causes alkalinity
d) none of these

Answer : D

Question. The maximum acidity in water will occur at a pH value of ?
a) 0
b) 2
c) 7
d) 14

Answer : A

Question. The commercial osmoscope is graduated with po values from ?
a) 0 to 5
b) 5 to 10
c) 10 to 15
d) 15 to 20

Answer : A

Question. The alkalinity in water is caused by ?
a) sodium carbonate
b) potassium carbonate
c) calcium hydroxide
d) all of the above

Answer : D

Question. The portion of soil through which lateral movement of water take place is ?
a) water table
b) an aquiclude
c) zone of saturation
d) none of these

Answer : C

Question. Which of the following formula is used for computing the quantity of water for fire demand ?
a) Freeman's formula
b) Kuichling formula
c) Buston's formula
d) all of these

Answer : D

Question. The layers such as sand and gravel which allow the water to pass through them are known as ?
a) previous layers
b) aquifers
c) water bearing strata
d) all of these

Answer : D

Question. Dissolved impurities consist of ?
a) bacteria
b) iron
c) slit
d) fungi

Answer : B

Question. When the pO value of water is 5, then it has ?
a) no perceptible odour
b) distinct odour
c) faint odour
d) extremely strong odour

Answer : D

Question. The maximum permissible chlorine content for public supplies should be between ?
a) 0.1 to 0.2 ppm
b) 0.3 to 0.4 ppm
c) 1.2 to 4 ppm
d) 6.5 to 8 ppm

Answer : A

Question. The water bearing strata i.e. layers of sand, gravel etc. is called ?
a) an acquifer
b) an aquiclude
c) an aquifuge
d) zone of saturation

Answer : A

Question. The open wells or dug wells are also known as ?
a) shallow wells
b) draw wells
c) percolation wells
d) all of these

Answer : D

Question. The growth of population may be conveniently represented by ?
a) semi-logarthmic curve
b) logistic curve
c) straight line curve
d) all of these

Answer : B

Question. For large cities, the suitable method for forecasting population is ?
a) arithmetical increase method
b) graphical method
c) geometrical increase
d) comparative method

Answer : A

Question. The yield of a surface stream may be obtained by ?
a) cross-section velocity method
b) stream gauging
c) chemical method
d) all of these

Answer : D

Question. Suspended impurities consist of ?
a) iron
b) chlorine
c) bacteria
d) all of these

Answer : C

Question. The water obtained from .............. is generally known as sub-surface water ?
a) rains
b) rivers
c) reservoirs
d) artesian well

Answer : D

Question. The presence of hydrogen sulphide in water causes ?
a) softening
b) alkalinity
c) acidity
d) bad taste

Answer : C

Question. The odour of water can be determined by ?
a) thermometer
b) Osmoscope
c) Jackson's turbidimeter
d) none of these

Answer : B

Question. Low turbidity of water can be determined by ?
a) turbidity tube
b) Jacksons turbidimeter
c) Baylis turbidimeter
d) Hellipe turbidimeter

Answer : C

Question. Suspended impurities include ?
a) algae
b) protozoa
c) fungi
d) all of these

Answer : D

Question. Which of the following statement is correct ?
a) The sub-surface sources are not affected by draught
b) Infiltration galleries are most suitable for increasing the surface source supply, in dry season
c) The rate at which water percolates into well under safe maximum critical depression head is called yield of well
d) all of the above

Answer : D

Question. The turbidity in water is caused due to ?
a) silt
b) clay
c) finely divided organic matter
d) all of these

Answer : D

Question. The layers such as lime stone and sand stone which do not allow the water to pass through them are known as ?
a) aquifers
b) aquiclude
c) aquifuge
d) none of these

Answer : B

Question. In designing a water works for a city to meet the water demand for public use,a precision about ............... of the total consumption is made ?
a) 5 %
b) 10 %
c) 20 %
d) 25 %

Answer : B

Question. The amount of water collected in a reservoir is divided into three portions and the order of their existance from bottom to the top is ?
a) useful storage, surcharge storage, dead storage
b) useful storage, dead storage, surcharge storage
c) dead storage, useful storage, surcharge storage
d) none of the above

Answer : C

Question. Turbidity of water is expressed in terms of ?
a) silica scale
b) platinum cobalt scale
c) no value
d) none of these

Answer : A

Question. The yield of the well depends upon the ?
a) permeability of the soil
b) position of water table
c) depth of well in impervious layer
d) all of these

Answer : D

Question. The water obtained from the tube wells is known as ?
a) surface water
b) sub-surface water
c) run-off
d) potable water

Answer : B

Question. An artesian spring is formed ?
a) when an aquifer gets exposed in a valley against a vertical cut
b) due to continuous fault in a rock through which water under pressure comes out
c) when a porous strata gets enclosed between two impervious strata
d) none of the above

Answer : C

Question. The design period for a water supply project is taken as ?
a) 5 to 10 years
b) 10 to 15 years
c) 15 to 20 years
d) 20 to 30 year

Answer : D