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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.

51.

The drum situated in recording type makes one rotation for how many hours?(a) 4 hours(b) 24 hours(c) 6 hours(d) 12 hoursThis question was posed to me in an internship interview.Origin of the question is Rainfall and its Measurement topic in chapter Hydro Electric Power Plant of Energy Engineering

Answer»

The correct choice is (b) 24 hours

To elaborate: The rotating drum is kept rotating continuously with the HELP of electric MOTOR. The drum makes generally ONE rotation during 24 hours. On the rotating drum the graph paper is placed throughout its rotation the RECORDING is made.

52.

Water evaporated is carried with the air in form of vapor known as _______(a) Cloud(b) Drizzle(c) Fog(d) SmokeI had been asked this question by my school teacher while I was bunking the class.I would like to ask this question from Hydrology topic in section Hydro Electric Power Plant of Energy Engineering

Answer»

Correct answer is (a) Cloud

The EXPLANATION: It is the science which deals with RAINFALL. Water is evaporated from plants, rivers, oceans and carried with the air in the form of vapor which is KNOWN as cloud. Clouds vary in different SHAPE and SIZE and they move according to winds.

53.

What type of energy does rain falling holds relative to the oceans?(a) Potential energy(b) Kinematic energy(c) Electrical energy(d) Motion energyThe question was asked during an interview for a job.The question is from Hydrology in portion Hydro Electric Power Plant of Energy Engineering

Answer»

Correct answer is (a) Potential energy

Easy explanation: Rain falling on earth surface has potential energy relative to oceans TOWARDS which it flows. This energy can be converted into shaft work by HYDRAULIC prime mover and finally into ELECTRICAL energy. The conversion of this energy TAKES time.

54.

How much of the total amount of power developed world wide consists of hydro power plant?(a) 10%(b) 20%(c) 30%(d) 40%The question was posed to me in class test.I'd like to ask this question from Hydrology topic in section Hydro Electric Power Plant of Energy Engineering

Answer»

Right OPTION is (b) 20%

The best I can explain: Nearly 20% of the total world’s power is generated using hydro power plants. To countries in the world 90% of the nation’s power requirement is met by hydro power. When COMPARED country wise this amount is very HIGH.

55.

Which type of gate valves are used in high head installations?(a) Needle valves(b) Butterfly valves(c) Globe valve(d) Pinch valveThe question was asked by my college professor while I was bunking the class.The question is from Classification of Hydro-Plant in portion Hydro Electric Power Plant of Energy Engineering

Answer» RIGHT choice is (a) Needle valves

The explanation is: Needle valves are used in high head installations. The needle VALVE consists of three water filled CHAMBERS A, B and C in which HYDRAULIC pressures can be varied. The valves are opened and closed by varying the pressures in these chambers.
56.

Water containing H2S, CO2 and CH2 are less corrosive to dam structure.(a) True(b) FalseThis question was posed to me during an online interview.The above asked question is from Site Selection for Hydro Electric Power Plants in portion Hydro Electric Power Plant of Energy Engineering

Answer»

The correct ANSWER is (b) False

For explanation: WATER containing H2S, CO2 and CH2 are highly corrosive to dam structure. H2SO4 formed by OXIDATION of H2S ATTACK the cement and disintegrate the concrete. These gases increase the solubility of soil and rocks. STRUCTURES, metallic piping and penstock are also affected.

57.

Determine the flow rate of water, if the catchment area of hydroelectric power is 2500 km^2, with an average rainfall of 160cm. the percolation and evaporation losses account for 19%?(a) 9639.8 M^3/s(b) 42.8 M^3/s(c) 859.63 M^3/s(d) 2342 M^3/sThis question was posed to me in an interview for job.I need to ask this question from Hydrographs topic in chapter Hydro Electric Power Plant of Energy Engineering

Answer»

Correct choice is (a) 9639.8 M^3/s

Explanation: Amount of water available for power GENERATION,

QA = A X H X (1-y)

= 2500 X 10^6 X 160/100 (1-0.19)

= 3.04 X 10^11m^3

Flow rate of water,

Q = Qa/(365 X 24 X 60 X 60)

= (3.04 X 10^-6)/(365 X 24 X 60 X 60)= 9639.8 M^3/s.

58.

What does hydrograph based on day gives?(a) Idea about flood period during the month(b) Idea of rainfall(c) Idea of draught during the year(d) Idea of scarcity of water in the upcoming yearThis question was addressed to me during an internship interview.I want to ask this question from Hydrographs topic in division Hydro Electric Power Plant of Energy Engineering

Answer»

The correct option is (a) IDEA about FLOOD PERIOD during the month

Explanation: The hydrograph can be drawn TAKING day, month or year. The hydrograph on the BASIS of day gives an idea of the flood period during the month. The hydrograph on basis of month gives an idea about the dry period of the year.

59.

What do you call a graph which is plotted for discharge versus time?(a) Snow Graph(b) Hydrograph(c) Rain graph(d) Fluid graphI had been asked this question in an online quiz.The question is from Hydrographs in portion Hydro Electric Power Plant of Energy Engineering

Answer»

Right option is (B) HYDROGRAPH

To explain: The graph SHOWING discharge of flowing water with RESPECT to time for a specific time is known as hydrograph. The time period for discharge hydrograph may be hour, day, week or month. The discharge may m¬¬3/sec or day per SECOND meter.

60.

Rocky area gives higher runoff than sandy area.(a) True(b) FalseThis question was posed to me during an interview.I'm obligated to ask this question of Rainfall and its Measurement topic in division Hydro Electric Power Plant of Energy Engineering

Answer»

The CORRECT choice is (a) True

Explanation: The geology of catchment area is of fundamental importance in the consideration of runoff. Rocky area gives higher runoff than SANDY area. EVEN the EVAPORATION losses increase with the increase in temperature.

61.

Iso-hyete method is commonly used for the basin area above 500sq.km.(a) True(b) FalseThis question was addressed to me in final exam.Query is from Rainfall and its Measurement in chapter Hydro Electric Power Plant of Energy Engineering

Answer»

Right option is (a) True

To elaborate: Iso-hyete method is commonly used for the BASIN above 500sq.km. The analysis of rainfall for POWER GENERATION purposes is usually more CONCERNED with dry years rather than wet years. For the ASSESSMENT of storage requirements, it is often necessary to determine the driest period for which provision must be made.

62.

How many years of minimum rainfall is required to design hydroelectric projects?(a) 10(b) 20(c) 25(d) 35I had been asked this question during a job interview.Origin of the question is Rainfall and its Measurement topic in division Hydro Electric Power Plant of Energy Engineering

Answer»

Right OPTION is (d) 35

Easiest explanation: In the design of hydro-electric projects, the rainfall record of nearly 35 years is required. This period is ACCEPTED as giving a REASONABLY ACCURATE assessment of mean annual rainfall. Many times, it is not possible to wait many years for rainfall data and in such cases, shorter periods are accepted by design engineers with reserve and allowance is MADE for possible error.

63.

The base of the non-recording type rainfall is permanently fixed in the concrete block.(a) True(b) FalseThis question was addressed to me in semester exam.I would like to ask this question from Rainfall and its Measurement in chapter Hydro Electric Power Plant of Energy Engineering

Answer»

The correct answer is (a) True

To explain I WOULD SAY: The base of the gauge is permanently fixed into a concrete block at a site where rainfall is to be MEASURED. The precaution is taken during fixing, to level PERFECTLY. The gauge is fixed in the block in such a way that the top of the gauge will be 30 CM above the natural surface level.

64.

On what does the Quantity of water available at selected site depends?(a) Temperature at the selected site(b) Humidity at selected site(c) Vegetation of the area(d) Hydrological cycle of areaThe question was asked in final exam.This interesting question is from Hydrology topic in section Hydro Electric Power Plant of Energy Engineering

Answer»

The correct answer is (d) HYDROLOGICAL cycle of area

To explain I would say: The quantity of water available at the selected site depends UPON the hydrological cycle of nature. The quantity of water available can be determined from the study of RAINFALL and RUN off in the area.

65.

Which two countries have vast hydro resources?(a) Hungary and Luxemburg(b) India and china(c) Russia and Nepal(d) Japan and GeorgiaI got this question in class test.Question is taken from Hydrology in division Hydro Electric Power Plant of Energy Engineering

Answer»

Correct answer is (c) Russia and NEPAL

For explanation I would say: Russia and Nepal have vast hydro resources that are to be harnessed. As per the estimation of WORLD power ORGANIZATION, the world hydro potential is roughly 5000GW whereas only 4% of it (200GW) is presently developed.

66.

On what does generation of Hydro power depends?(a) Quantity of water available(b) On capacity of turbine(c) Height of head(d) Storage capacityThis question was addressed to me by my school teacher while I was bunking the class.This question is from Hydrology in division Hydro Electric Power Plant of Energy Engineering

Answer»

Right CHOICE is (a) Quantity of water available

Easiest explanation: Generation of power depends on the quantity of water available. The available head depends upon the SELECTION of site for HYDRAULIC power plant. The site of the power plant is always SELECTED for the highest available head when other THINGS are in favor of site selection.

67.

Low head hydro plant is also known as ____________(a) Canal power plant(b) Medium head hydro-plant(c) Run-off river hydro-plant(d) Base load hydro plantThe question was asked by my school teacher while I was bunking the class.My question comes from Classification of Hydro-Plant in division Hydro Electric Power Plant of Energy Engineering

Answer»

Right choice is (a) CANAL power plant

Explanation: Low head hydro electric power plant is also KNOWN as canal power plant. The dam in this TYPE of power plant is of very SMALL head may be even few METERS only. The low head type of power plants cannot store water.

68.

Which type of hydro plant is it if the head of a hydro plant is 30 – 100m?(a) High head hydro-plant(b) Medium head hydro-plant(c) Low head hydro-plant(d) Base load hydro-plantI had been asked this question during an interview for a job.I'd like to ask this question from Classification of Hydro-Plant in section Hydro Electric Power Plant of Energy Engineering

Answer» CORRECT choice is (b) Medium head hydro-plant

Best EXPLANATION: If the water AVAILABLE is more than 30M but less than 100M, than this type of plant is known as medium head plant. Water stored in fore bay is conveyed to the turbine through penstocks. In these plants the river water is tapped off to a fore bay on one bank of rive.
69.

The water from is drawn by the __________(a) Canal(b) Hose(c) Stream(d) PenstockI have been asked this question in an interview for internship.Origin of the question is Site Selection for Hydro Electric Power Plants in portion Hydro Electric Power Plant of Energy Engineering

Answer»

Right choice is (a) Canal

The explanation: The water from reservoir is drawn by the FORE BAY through an open canal or tunnel. The water from fore bay is SUPPLIED to water turbine through penstock which is located at much LOWER level than the HEIGHT of water in reservoir.

70.

Determine the pondage factor if the plant is working at peak time of 16 hrs?(a) 1.5(b) 0.75(c) 2.5(d) 0.3I have been asked this question in an online quiz.The query is from Hydrographs in chapter Hydro Electric Power Plant of Energy Engineering

Answer»

Right ANSWER is (a) 1.5

To ELABORATE: Pondage factor = T1/T2 = (Total number of HOURS in ONE day)/(Total number of hours PLANT is running)

P.F = 24/16= 1.5.

71.

Amount of rainfall which runs off the earth’s land surface to form stream is used for ______(a) Flower generation(b) Back water storage(c) Pit Irrigation(d) Left through canalsThis question was posed to me in an online interview.The doubt is from Hydrology in portion Hydro Electric Power Plant of Energy Engineering

Answer»

Correct choice is (a) Flower generation

To EXPLAIN: About 2/3 portion of rain is returned back to atmosphere and 1/3 portion is returned back by oceans. The amount of rainfall which runs off the EARTH’s land surface to FORM streams and rivers is used for flower generation.

72.

The magnitude of runoff as ordinates against the corresponding percentage of time as abscissa gives ________(a) Mass duration curve(b) Load duration curve(c) Power duration curve(d) Flow duration curveThis question was posed to me in an interview for internship.My doubt is from Hydrographs topic in portion Hydro Electric Power Plant of Energy Engineering

Answer»

The correct CHOICE is (d) Flow duration curve

For EXPLANATION: The magnitude of runoff as ORDINATES against the corresponding percentage of time as abscissa gives Flow duration curve. If the magnitude on the ordinate is the potential POWER contained in the stream flow, then the curve is known as power duration curve.

73.

The relation between the area of rainstorm and its average intensity is used in assessing _________(a) Amount of water(b) Amount of rain(c) Amount of wind(d) Amount of duration of rainThis question was posed to me in final exam.This key question is from Rainfall and its Measurement topic in division Hydro Electric Power Plant of Energy Engineering

Answer»

Correct option is (b) Amount of rain

The best explanation: The relation between the area of rainstorm and its average intensity is used in assessing the amount of rain which may be expected to fall upon a CATCHMENT area within a GIVEN period. The intensity of rainfall is EQUALLY important in the design of SPILLWAYS during heavy rain periods.

74.

What AEP stand for in hydrology?(a) Annual exceedance probability(b) Annual energy production(c) Annual exceedance period(d) Automatic engagement panelThis question was addressed to me at a job interview.I would like to ask this question from Hydrographs in section Hydro Electric Power Plant of Energy Engineering

Answer»

Correct ANSWER is (a) Annual exceedance probability

To elaborate: Annual exceedance probability refers to the probability of a flood EVENT occurring in any year. The probability is expressed as a percentage. The probability that a given rainfall total ACCUMULATED over a given DURATION will be exceeded in any one year.

75.

About how much amount of precipitate is returned back to atmosphere?(a) 2/3(b) 1/4(c) 3/4(d) 1/3I had been asked this question during an interview for a job.My question is from Hydrology in chapter Hydro Electric Power Plant of Energy Engineering

Answer»

The CORRECT option is (a) 2/3

To explain I would say: Precipitation INCLUDES all WATER that falls from the ATMOSPHERE to earth’s surface in any form. About 2/3 portion of precipitation that reaches LAND surface is returned back to atmosphere by water surfaces, soil and vegetation.

76.

A pipe between surge tank and prime mover is known as?(a) Canal(b) Draft tube(c) Penstock(d) HoseI had been asked this question during an online interview.My question is taken from Site Selection for Hydro Electric Power Plants topic in division Hydro Electric Power Plant of Energy Engineering

Answer»

Right choice is (c) PENSTOCK

The best explanation: A pipe between the surge tank and prime mover is KNOWN as penstock. It is MADE of steel through REINFORCED CONCRETE. Cast iron is used for small plants. The intake of penstock at the dam or fore bay of canal should be positioned such that it always provides adequate water even at low level.

77.

Above which range should be the unit hydrographs be used?(a) Around 5000 sq km(b) Over 2500 sq km(c) Around 4000 sq km(d) Below 5000 sq kmI have been asked this question in examination.This intriguing question comes from Hydrographs in portion Hydro Electric Power Plant of Energy Engineering

Answer»

Correct OPTION is (a) Around 5000 sq KM

To elaborate: In practice, only a limited number of unit HYDROGRAPHS are used for a GIVEN basin. It is also COMMON practice to neglect the variations in rainfall distribution within the basin area. Hence it is not advisable to use unit hydrograph method for basins over 5000 sq km.

78.

What does CN stands for in hydrology?(a) Cyanide(b) Channel number(c) Cumulonimbus(d) Carbon nano-tubeThis question was addressed to me during a job interview.I want to ask this question from Hydrographs topic in division Hydro Electric Power Plant of Energy Engineering

Answer»

The correct answer is (c) Cumulonimbus

Easy explanation: Cumulonimbus, from the Latin cumulus and nimbus, is a dense, TOWERING vertical cloud associated with THUNDERSTORMS and ATMOSPHERIC instability, forming from water vapor carried by powerful upward air currents.

79.

How many methods are used to determine the average rainfall depending upon area of basin in rain gauging?(a) 2(b) 3(c) 4(d) 5I have been asked this question in an online interview.The doubt is from Rainfall and its Measurement in section Hydro Electric Power Plant of Energy Engineering

Answer»

Right choice is (b) 3

Easiest explanation: When there are more basins, three of the following METHODS are used to determine the AVERAGE of rainfall depending upon the area of basin. They are Arithmetic mean METHOD, THIESSON method and iso-hyetol method.

80.

The surge tank controls the water when the load on the turbine is ________(a) Equal(b) Decreased(c) Increased(d) Not presentThe question was asked in an international level competition.I would like to ask this question from Classification of Hydro-Plant topic in section Hydro Electric Power Plant of Energy Engineering

Answer»

The CORRECT option is (B) Decreased

The best I can explain: The surge TANK controls the water when the load on the turbine decreases. The excess water is stored in the surge tank and hence the PRESSURE variations in the PENSTOCK are taken care of preventing water hammer.

81.

In which of the following rain gauging method is contour joining the points of equal rainfall is done?(a) Arithmetic mean method(b) Thiesson method(c) Iso-hyetol method(d) Recording typeThe question was posed to me in exam.This interesting question is from Rainfall and its Measurement in chapter Hydro Electric Power Plant of Energy Engineering

Answer»
82.

In which of the following rain gauging methods are the values of rainfalls of all stations added?(a) Arithmetic mean method(b) Thiesson method(c) Iso-hyetol method(d) Recording typeThe question was posed to me in an interview for internship.My query is from Rainfall and its Measurement in portion Hydro Electric Power Plant of Energy Engineering

Answer»

The correct answer is (a) Arithmetic mean method

To explain: In arithmetic mean method, the values of rainfalls of all the stations are added and the sum is divided by the NUMBER of gauging stations. This can be REPRESENTED in the mathematical term as:

ha = \(\frac{h1+h2…….hn}{N} = \frac{Ʃh}{n}\).

83.

Water on the ground surface entering the soil is called _________(a) Infiltration(b) Transpiration(c) Filtration(d) PrecipitationThis question was addressed to me during an interview for a job.The above asked question is from Hydrology in section Hydro Electric Power Plant of Energy Engineering

Answer»

Right ANSWER is (a) INFILTRATION

Explanation: Infiltration is the process by which water on the ground SURFACE enters the SOIL. Infiltration rate in soil SCIENCE is a measure of the rate at which soil is able to absorb rainfall. It is measured in inches per hour or millimeters per hour.

84.

Determine the pondage factor if the plant is working at time of 8 hrs?(a) 2.5(b) 3.8(c) 1(d) 3I got this question at a job interview.I need to ask this question from Hydrographs in portion Hydro Electric Power Plant of Energy Engineering

Answer»

Correct option is (d) 3

The best explanation: Pondage factor = T1/T2

= (Total NUMBER of hours in one day)/(Total number of hours PLANT is running)

P.F = 24/8= 3.

85.

Find the power available if overall efficiency of plant is 80%, flow rate is 4.42cumecs and head 400m?(a) 6.52MW(b) 8.18MW(c) 11.255MW(d) 13.875MWI had been asked this question in my homework.I want to ask this question from Hydrographs topic in chapter Hydro Electric Power Plant of Energy Engineering

Answer»

Right CHOICE is (d) 13.875MW

For EXPLANATION I would say: Power AVAILABLE:

P = wQHno X 10^-3 KW

= 9810 X 4.42 X 400 X 0.8 X 10^-6 MW

P = 13.875MW.

86.

The runoff calculated from the rainfall data available for sufficiently long period by multiplying with a coefficient is known as _________(a) Runoff coefficient(b) Rainfall coefficient(c) Topographic coefficient(d) Geo coefficientThis question was addressed to me during an internship interview.My doubt stems from Rainfall and its Measurement in chapter Hydro Electric Power Plant of Energy Engineering

Answer»
87.

Average annual rainfall ranging to dessert to hilly regions would be ________________(a) 1100cm(b) 2500cm(c) 845cm(d) 500cmThis question was posed to me by my school principal while I was bunking the class.Question is from Rainfall and its Measurement in chapter Hydro Electric Power Plant of Energy Engineering

Answer»

Right option is (a) 1100CM

To elaborate: The rainfall varies widely from ONE part of the world to ANOTHER, ranging from desert regions to the hilly regions where the average annual rainfall may be over 1100cm. in some regions, the seasonal variation is very slight and monthly RAINFALLS are relatively UNIFORM.

88.

Where is the catchment area situated with respect to dam?(a) Behind the dam(b) Front of dam(c) Right beneath the dam(d) Opposite to the Dam HeadI have been asked this question by my school teacher while I was bunking the class.My enquiry is from Hydrology topic in division Hydro Electric Power Plant of Energy Engineering

Answer»

The correct ANSWER is (a) Behind the dam

For explanation: CATCHMENT area of a hydro site is the total area located behind the dam, Draining water into the reservoir. The place is usually steep at this point. And the Dam head acts as outlet point to LET out the water after utilizing it for power PRODUCTION.

89.

What source of energy does evaporation and precipitation consists of?(a) Perennial energy(b) Gravitational energy(c) Thermal energy(d) Kinetic energyI had been asked this question during an interview.I'm obligated to ask this question of Hydrology in portion Hydro Electric Power Plant of Energy Engineering

Answer»

The correct option is (a) Perennial energy

To ELABORATE: This evaporation and precipitation is a natural CONTINUOUS process and THEREFORE constitutes a perennial source of energy. Both these evaporation and precipitation come under the HYDROLOGICAL cycle.

90.

What type of Hydro plant is it if the Plant head is above 100m?(a) High head hydro-plant(b) Medium head hydro-plant(c) Low head hydro-plant(d) Base load hydro-plantThe question was posed to me in an international level competition.My doubt is from Classification of Hydro-Plant in section Hydro Electric Power Plant of Energy Engineering

Answer» RIGHT option is (a) HIGH head hydro-plant

The EXPLANATION: If the head of water available is above 100m, the plant is known as a high head plant. IN this head, water available for PRODUCING electricity is very high and it can EXTEND to 1000 meters. These are most commonly constructed hydro plants.
91.

A safety valve for a dam to discharge major floods is called?(a) Spillway(b) Penstock(c) Fore bay(d) CanalThis question was addressed to me in an online quiz.This key question is from Site Selection for Hydro Electric Power Plants in division Hydro Electric Power Plant of Energy Engineering

Answer» CORRECT option is (a) Spillway

For explanation I WOULD say: Spillway is a SAFETY valve for a dam to discharge major floods without damage to dam. It keeps the RESERVOIR level below some predetermined MAXIMUM level. Spillway ensures that water does not overflow and damage or destroy the dam.
92.

When is the Hydrograph called as a unit hydrograph?(a) When 1cm of runoff is resulted from a rain fall(b) When 3cm of runoff is resulted from rainfall(c) When 1mm of runoff is resulted from rainfall(d) When 3mm of runoff is resulted from rainfallThe question was posed to me in examination.Enquiry is from Hydrographs in portion Hydro Electric Power Plant of Energy Engineering

Answer»

Correct OPTION is (a) When 1cm of runoff is resulted from a rain fall

For explanation: If the rainfall distribution in the storms is similar with respect to time and area, the ordinate of each HYDROGRAPH will be proportional to volume of runoff. The unit hydrograph is a hydrograph with a volume of 1cm runoff RESULTING from a rainfall of SPECIFIED duration and a real pattern.

93.

Where are funnel and receiver in Non-recording type placed?(a) Inside a Metal case(b) On top of the equipment(c) Below the base of equipment(d) In between the metal caseI have been asked this question by my college director while I was bunking the class.Enquiry is from Rainfall and its Measurement in portion Hydro Electric Power Plant of Energy Engineering

Answer» CORRECT choice is (a) Inside a METAL case

The EXPLANATION is: The non-recording gauge usually consists of a standard funnel discharging into a receiver large ENOUGH to hold the maximum possible day’s rainfall. The funnel and receiver are placed in a metal casing with suitable packing.
94.

The evaporation of water from the surfaces and its precipitation is known as ___________(a) Science(b) Infiltration(c) Hydrological cycle(d) VegetationThe question was asked in a job interview.My doubt stems from Hydrology in chapter Hydro Electric Power Plant of Energy Engineering

Answer»

Right option is (c) HYDROLOGICAL cycle

To elaborate: It’s the science which deals with rainfall and RUNOFF. The EVAPORATION of the water from the surfaces of river and oceans and its precipitation on the earth is known as hydrological cycle. This happens in a particular AMOUNT of PERIOD.

95.

Water gets polluted by submerged vegetation mineral.(a) True(b) FalseI had been asked this question in an international level competition.Asked question is from Site Selection for Hydro Electric Power Plants topic in chapter Hydro Electric Power Plant of Energy Engineering

Answer»

Correct option is (a) True

Best explanation: Water GETS polluted by submerged vegetation mineral deposits, presence of ALGAE, Leaves, twigs, logs under water decay and generates bad smelling gases. Thermal stratification and depletion of oxygen in lower STRATA generate harmful gases such CO2 which POLLUTE the water.

96.

What is unit hydrograph helpful in?(a) Estimating runoff from a basin(b) Estimating no of days of rain fall(c) Knowing the draught months in a year(d) In deciding the land for hydel power plantThis question was posed to me in a national level competition.I'm obligated to ask this question of Hydrographs topic in portion Hydro Electric Power Plant of Energy Engineering

Answer»

Correct answer is (a) Estimating runoff from a BASIN

The explanation: Unit hydrograph is helpful in estimating runoff from a basin for a storm of GIVEN DURATION. It is also helpful in predicting the expected flood flow from a catchment if rainfall intensity in the catchment is KNOWN.

97.

There is requirement for wind shelter to reduce wind effect at rain gauge area.(a) True(b) FalseThis question was posed to me during an interview.My question is taken from Rainfall and its Measurement topic in division Hydro Electric Power Plant of Energy Engineering

Answer»

Right ANSWER is (a) True

The best EXPLANATION: A WIND shelter should be PROVIDED to reduce the effect of wind. The gauge should be erected on a LEVEL ground. The distance of the gauge from every object should not be less than twice the height of the object above the gauge.

98.

Choose the correct sentence about information available from hydrograph among the following options?(a) The mean annual runoff or mean runoff each week of the year(b) Total volume at that instant, as the area under hydrograph indicates the force of water during the duration(c) Rate of flow at any particular time during the duration period(d) Mean runoff for each monthThis question was addressed to me by my school teacher while I was bunking the class.Asked question is from Hydrographs in chapter Hydro Electric Power Plant of Energy Engineering

Answer»

Right choice is (d) Mean runoff for each month

To explain: Mean runoff for each month is available. As compared to all other option, they would be- i) The mean annual runoff or mean runoff each month of the YEAR. ii) TOTAL VOLUME at that instant, as the area under hydrograph INDICATES the volume of water during the duration. iii) Rate of flow at any instant during the duration period.

99.

Movement and filtering of fluid from porous material is called as __________(a) Percolation(b) Infiltration(c) Transpiration(d) PrecipitationThis question was posed to me by my school teacher while I was bunking the class.The query is from Rainfall and its Measurement topic in section Hydro Electric Power Plant of Energy Engineering

Answer»
100.

How many types of rain gauges are there?(a) 2(b) 3(c) 4(d) 5I got this question in quiz.The question is from Rainfall and its Measurement topic in chapter Hydro Electric Power Plant of Energy Engineering

Answer»

Right choice is (a) 2

For explanation I would say: There are two TYPES of rain gauges. They are Non-RECORDING type and recording type. Non-recording type do not record the DEPTH of rainfall but only collect the amount of rainfall and recording type records the depth of rainfall in mm or cm.