While determining the yield of open wells by the pumping test (A) Velocity of recharging water, increases with depression head (B) Depression head resulting at critical velocity, is called critical depression head (C) Working head is generally limited to (D) Maximum safe yield of an open well, is expected at critical depression head

While determining the yield of open wells by the pumping test 

(A) Velocity of recharging water, increases with depression head 

(B) Depression head resulting at critical velocity, is called critical depression head 

(C) Working head is generally limited to 

(D) Maximum safe yield of an open well, is expected at critical depression head 


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1 Answer

Answer :

(D) Maximum safe yield of an open well, is expected at critical depression head 


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Related questions

The expected discharge to be obtained from an open well sunk in coarse sand is 0.0059 cumec. If the working depression head of the well is 3 m, the minimum diameter of the well, is (A) 2 m (B) 2.25 m (C) 2.50 m (D) 3.00 m

Description : The expected discharge to be obtained from an open well sunk in coarse sand is 0.0059 cumec. If  the working depression head of the well is 3 m, the minimum diameter of the well, is  (A) 2 m  (B) 2.25 m  (C) 2.50 m  (D) 3.00 m 

Last Answer : (D) 3.00 m 

When a constant discharge 2.91 litres/sec. was obtained in a pumping test, the draw downs in the test wells at 3 m and 6.184 m were 2.6 m and 0.3 m respectively. If over-all depth of the pumping well was 16 m, the permeability of the soil, is (A) 0.0005 cm/sec (B) 0.001 cm/sec (C) 0.002 cm/sec (D) 0.01 cm/sec

Description : When a constant discharge 2.91 litres/sec. was obtained in a pumping test, the draw downs in the test wells at 3 m and 6.184 m were 2.6 m and 0.3 m respectively. If over-all depth of the pumping well was 16 m, the ... (A) 0.0005 cm/sec (B) 0.001 cm/sec (C) 0.002 cm/sec (D) 0.01 cm/sec

Last Answer : Answer: Option B

Pick up the correct statement from the following: (A) Air lift pumps are generally used for pumping water from deep wells (B) Jet pumps are generally used for pumping water from small wells (C) The hydraulic ram works on the principle of water hammer (D) All the above

Description : Pick up the correct statement from the following: (A) Air lift pumps are generally used for pumping water from deep wells (B) Jet pumps are generally used for pumping water from small wells (C) The hydraulic ram works on the principle of water hammer (D) All the above

Last Answer : (D) All the above

Pick up the correct statement from the following: (A) The water level in a still well, represents the ground water table level (B) The difference between water table level and the water level in a well after pumping, is called depression head (C) The surface of water table surrounding a well during pumping, forms a cone of depression (D) All the above

Description : Pick up the correct statement from the following:  (A) The water level in a still well, represents the ground water table level  (B) The difference between water table level and the water ... water table surrounding a well during pumping, forms a cone of depression  (D) All the above 

Last Answer : (D) All the above 

The water level in an open well was depressed by pumping 2.5 m and recuperated 2.87 m in 3 hours and 50 minutes. The yield of the well per minute is (A) 0.0033 (B) 0.0044 (C) 0.0055 (D) 0.0066

Description : The water level in an open well was depressed by pumping 2.5 m and recuperated 2.87 m in 3  hours and 50 minutes. The yield of the well per minute is  (A) 0.0033  (B) 0.0044  (C) 0.0055  (D) 0.0066 

Last Answer : (C) 0.0055 

The coefficients of permeability of soils of an unconfined aquifer and another confined aquifer were determined by pumping water from the wells and observing the effect of water table in two test wells at equal distances was found to be equal. The total height of confined aquifer H is given by (A) H = h2 - h1 (B) H = h1 - h2 (C) H = h2 + h1 (D) ½ (h1 + h2)

Description : The coefficients of permeability of soils of an unconfined aquifer and another confined aquifer were determined by pumping water from the wells and observing the effect of water table in two test wells at equal distances was found to be equal. ... (B) H = h1 - h2 (C) H = h2 + h1 (D) ½ (h1 + h2)

Last Answer : Answer: Option D

Identify the method of recharging groundwater aquifers. (a) Bore wells (b) Recharge trenches (c) Percolation pits. (d) Recharge trenches.

Description : Identify the method of recharging groundwater aquifers. (a) Bore wells (b) Recharge trenches (c) Percolation pits. (d) Recharge trenches.

Last Answer : (c) Percolation pits.

Specific capacity or yield of wells, is generally expressed, as (A) m 3 per sec (B) m 3 /hour (C) m 3 /hour/m2 (D) m 3 /hour/m2 /m

Description : Specific capacity or yield of wells, is generally expressed, as  (A) m 3  per sec  (B) m 3 /hour  (C) m 3 /hour/m2 (D) m 3 /hour/m2 /m 

Last Answer : (D) m 3 /hour/m2 /m 

The surface joining the static levels in several non-pumping wells penetrating a continuous confined aquifer represents (a) Water-table surface (b) Capillary fringe (c) Piezometric surface of the aquifer (d) Physical top surface of the aquifer

Description : The surface joining the static levels in several non-pumping wells penetrating a continuous confined aquifer represents (a) Water-table surface (b) Capillary fringe (c) Piezometric surface of the aquifer (d) Physical top surface of the aquifer

Last Answer : (c) Piezometric surface of the aquifer

For the same draw down in two observations wells at distances r1 and r2, the times after start of pumping are t1 and t2 hours respectively. The relation which holds good is (A) t2 = r2/r1 × t1 (B) t2 = (r2/r1)² × t1 (C) t2 = (r2/r1)3 × t1 (D) t2 = (r2/r1) × t1 2

Description : For the same draw down in two observations wells at distances r1 and r2, the times after start of  pumping are t1 and t2 hours respectively. The relation which holds good is  (A) t2 = r2/r1 × t1 (B) t2 = (r2/r1)² × t1 (C) t2 = (r2/r1)3  × t1 (D) t2 = (r2/r1) × t1 2

Last Answer : (B) t2 = (r2/r1)² × t1

The difference between static water level and pumping water level is known as: a drawdown b well yield c specific capacity d all are correct

Description : The difference between static water level and pumping water level is known as: a drawdown b well yield c specific capacity d all are correct

Last Answer : a drawdown

Corrosion of well pipes may not be reduced by (A) Reducing the draw down and the pumping rate (B) Reducing the flow velocity (C) Using thicker pipes (D) Using screens having larger area of openings

Description : Corrosion of well pipes may not be reduced by  (A) Reducing the draw down and the pumping rate  (B) Reducing the flow velocity  (C) Using thicker pipes  (D) Using screens having larger area of openings 

Last Answer : (D) Using screens having larger area of openings 

The head against which the motor works for lifting water, is (A) Maximum depth of water table below ground level (B) Maximum depression head (C) Velocity head (D) All the above

Description : The head against which the motor works for lifting water, is  (A) Maximum depth of water table below ground level  (B) Maximum depression head  (C) Velocity head  (D) All the above 

Last Answer : (D) All the above 

The head against which the motor works for lifting water, is (A) Maximum depth of water table below ground level (B) Maximum depression head (C) Velocity head (D) All the above

Description : The head against which the motor works for lifting water, is  (A) Maximum depth of water table below ground level  (B) Maximum depression head  (C) Velocity head  (D) All the above 

Last Answer : (D) All the above 

A well penetrates to 30 m below the static water table. After 24 hours of pumping at 31.40 litres/minute, the water level in a test well at a distance of 80 m is lowered by 0.5 m and in a well 20 m away water is lowered by 1.0 m. The transmissibility of the aquifer, is (A) 1.185 m2 /minute(B) 1.285 m2/minute (C) 1.385 m2/minute (D) 1.485 m2/minute

Description : A well penetrates to 30 m below the static water table. After 24 hours of pumping at 31.40 litres/minute, the water level in a test well at a distance of 80 m is lowered by 0.5 m and in a well 20 m away water is ... 1.185 m2 /minute (B) 1.285 m2 /minute (C) 1.385 m2 /minute (D) 1.485 m2 /minute

Last Answer : Answer: Option C

Pick out the wrong statement. (A) The value of hydrostatic head increases with increase in vacuum in the effect in a multiple effect evaporator system (B) Entering velocity of the liquid in the tubes of natural circulation evaporators is in the range of 0.3 to 0.9 metre/second (C) Duhring's plot is used for calculating the concentration of solution (D) In a multiple effect evaporation system, the number of effects is limited by the total boiling point rise

Description : Pick out the wrong statement. (A) The value of hydrostatic head increases with increase in vacuum in the effect in a multiple effect evaporator system (B) Entering velocity of the liquid in ... a multiple effect evaporation system, the number of effects is limited by the total boiling point rise

Last Answer : (C) Duhring's plot is used for calculating the concentration of solution

Pick up the correct statement from the following: (A) The difference of latest occurrence time and earliest expected time, is called slack (B) The activities connecting the events having zero slack, lie on the critical path (C) The critical path consumes the maximum time (D) All the above

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Pick up the correct statement from the following: (A) Detention period for plain sedimentation tanks ranges between 4 to 8 hours (B) Detention period for sedimentation tanks, using coagulants usually ranges between 2 to 4 hours(C) The horizontally flow velocity in sedimentation tanks, is generally limited to 0.3 m/minute (D) All the above

Description : Pick up the correct statement from the following:  (A) Detention period for plain sedimentation tanks ranges between 4 to 8 hours  (B) Detention period for sedimentation tanks, using coagulants usually ... in sedimentation tanks, is generally limited to 0.3 m/minute  (D) All the above

Last Answer : (D) All the above

When the reduced level of the water source is higher than the reduced level of the consumer's place, water is generally supplied (A) By pumping system (B) By gravitational system (C) Both (a) and (b) (D) All the above

Description : When the reduced level of the water source is higher than the reduced level of the consumer's  place, water is generally supplied  (A) By pumping system  (B) By gravitational system  (C) Both (a) and (b)  (D) All the above 

Last Answer : (B) By gravitational system 

In pumping stations, the type of joint generally used, is (A) Socket and spigot joint (B) Flanged joint (C) Expansion joint (D) Dresser coupling joint

Description : In pumping stations, the type of joint generally used, is (A) Socket and spigot joint (B) Flanged joint (C) Expansion joint (D) Dresser coupling joint

Last Answer : (B) Flanged joint

The efficiency of a pumping set, is generally assumed (A) 50 % (B) 55 % (C) 60 % (D) 65 %

Description : The efficiency of a pumping set, is generally assumed  (A) 50 %  (B) 55 %  (C) 60 %  (D) 65 % 

Last Answer : (D) 65 % 

―Lencho, who knew his field intimately well.‖ ̳Intimately well‘ refers to _______. (a) The yield expected from the crops. (b) The damage that the land could incur. (c) The prediction that the rain would visit the place. (d) He knew the surrounding areas very well.

Description : ―Lencho, who knew his field intimately well.‖ ̳Intimately well‘ refers to _______. (a) The yield expected from the crops. (b) The damage that the land could incur. (c) The prediction that the rain would visit the place. (d) He knew the surrounding areas very well.

Last Answer : (c) The prediction that the rain would visit the place.

Pick up the correct statement from the following: (A) Head loss in smaller size pipes at equal velocities, is less (B) Cost of pumping is less in smaller size pipes (C) Cost of smaller pipes is comparatively more (D) None of these

Description : Pick up the correct statement from the following:  (A) Head loss in smaller size pipes at equal velocities, is less  (B) Cost of pumping is less in smaller size pipes  (C) Cost of smaller pipes is comparatively more  (D) None of these 

Last Answer : (D) None of these 

If the chosen diameter of a pipe, is less than the economical diameter (A) Cost of pipe will be less (B) Head loss will be high (C) Cost of pumping will be more than saving (D) All the above

Description : If the chosen diameter of a pipe, is less than the economical diameter  (A) Cost of pipe will be less  (B) Head loss will be high  (C) Cost of pumping will be more than saving  (D) All the above

Last Answer : (D) All the above

The critical depth meter is used to measure (A) Velocity of flow in an open channel (B) Depth of flow in an open channel (C) Hydraulic jump (D) Depth of channel

Description : The critical depth meter is used to measure (A) Velocity of flow in an open channel (B) Depth of flow in an open channel (C) Hydraulic jump (D) Depth of channel

Last Answer : Answer: Option C

Which one of the following activities is not correct as applicable to brick corbels? (A) The maximum projection of the corbel should not be more than the thickness of the wall (B) The maximum projection of each corbel course should be limited to a quarter brick at a time (C) The discontinuous corbels are used to carry heavy concentrated loads (D) Stretcher bond is generally used for the construction of brick corbel

Description : Which one of the following activities is not correct as applicable to brick corbels? (A) The maximum projection of the corbel should not be more than the thickness of the wall (B) The ... to carry heavy concentrated loads (D) Stretcher bond is generally used for the construction of brick corbel

Last Answer : Answer: Option D

Higher yield may be expected from (A) Gravity springs (B) Surface springs (C) Artesian springs (D) All the above

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Last Answer : (C) Artesian springs

Photosynthesis in C4 plants is relatively less limited by atmospheric CO2 levels because (a) effective pumping of CO2 into bundle sheath cells (b) RuBisCO in C4 plants has higher affinity for CO2 (c) four carbon acids are the primary initial CO2 fixation products (d) the primary fixation of CO2 is mediated via PEP carboxylase. (2005) 65. In sugarcane plant

Description : Photosynthesis in C4 plants is relatively less limited by atmospheric CO2 levels because (a) effective pumping of CO2 into bundle sheath cells (b) RuBisCO in C4 plants has higher affinity for CO2 (c ... d) the primary fixation of CO2 is mediated via PEP carboxylase. (2005) 65. In sugarcane plant

Last Answer : (d) the primary fixation of CO2 is mediated via PEP carboxylase.

Recuperation test is carried out to determine (A) Turbidity of water (B) pH value of water (C) Yield of well (D) Discharge from a well

Description : Recuperation test is carried out to determine  (A) Turbidity of water  (B) pH value of water  (C) Yield of well  (D) Discharge from a well 

Last Answer : (A) Turbidity of water 

Question No. 216 If the specific capacity of a well is 0.3183 × 10-3 per sec, the discharge from a well of 4 m diameter under a depression head of 4 m, is (A) 8 litres/sec (B) 10 litres/sec (C) 12 litres/sec (D) 16 litres/sec

Description : Question No. 216 If the specific capacity of a well is 0.3183 × 10-3 per sec, the discharge from a well of 4 m diameter under a depression head of 4 m, is (A) 8 litres/sec (B) 10 litres/sec (C) 12 litres/sec (D) 16 litres/sec

Last Answer : (D) 16 litres/sec

S1 and S2 are the draw downs in an observation well at times t1 and t2 after pumping. For discharge Q and coefficient of transmissibility T, the relationship, is (A) S2 - S1 = (2.3Q/ ) log10 (t2/t1) (B) S2 - S1 = (2.3Q/4 ) log10 (t2/t1) (C) S2 - S1 = (2.3Q/4 ) loge (t2/t1) (D) S2 - S1 = (2.3Q/4 ) loge (t1/t2

Description : S1 and S2 are the draw downs in an observation well at times t1 and t2 after pumping. For  discharge Q and coefficient of transmissibility T, the relationship, is  (A) S2 - S1 = (2.3Q/ ) log10 (t2/t1)  (B) S2 - S1 ... - S1 = (2.3Q/4 ) loge (t2/t1)  (D) S2 - S1 = (2.3Q/4 ) loge (t1/t2

Last Answer : (B) S2 - S1 = (2.3Q/4 ) log10 (t2/t1) 

While determining the workability of concrete mix, the compaction factor test is ------than the slump cone test [ A ] Less accurate [ B ] More accurate [ C ] Approximate method [ D ] None of the above

Description : While determining the workability of concrete mix, the compaction factor test is ------than the slump cone test [ A ] Less accurate [ B ] More accurate [ C ] Approximate method [ D ] None of the above

Last Answer : [ B ] More accurate

Water to the consumers may be supplied from (A) Infiltration galleries connected to sump well (B) Infiltration well dug out on the banks of rivers (C) Ranney wells sunk to the water level (D) All the above

Description : Water to the consumers may be supplied from  (A) Infiltration galleries connected to sump well  (B) Infiltration well dug out on the banks of rivers  (C) Ranney wells sunk to the water level  (D) All the above 

Last Answer : (D) All the above 

Select the incorrect statement. Effective angle of shearing resistance (A) Increases as the size of particles increases (B) Increases as the soil gradation improves (C) Is limited to a maximum value of 45° (D) Is rarely more than 30° for fine grained soil

Description : Select the incorrect statement. Effective angle of shearing resistance (A) Increases as the size of particles increases (B) Increases as the soil gradation improves (C) Is limited to a maximum value of 45° (D) Is rarely more than 30° for fine grained soil

Last Answer : (C) Is limited to a maximum value of 45°

Abyssinian tube well is a special type of (A) Slotted type wells (B) Cavity type wells (C) Strainer type well (D) None of these

Description : Abyssinian tube well is a special type of (A) Slotted type wells (B) Cavity type wells (C) Strainer type well (D) None of these

Last Answer : (C) Strainer type well

Shrouding' is essentially provided in (A) Strainer type wells (B) Cavity type wells (C) Slotted type well (D) All the above

Description : Shrouding' is essentially provided in  (A) Strainer type wells  (B) Cavity type wells  (C) Slotted type well  (D) All the above 

Last Answer : (C) Slotted type well 

The Dupuit formula is based on (A) One observation well (B) Two observation wells (C) Three observation wells (D) No observation well

Description : The Dupuit formula is based on (A) One observation well (B) Two observation wells (C) Three observation wells (D) No observation well

Last Answer : Answer: Option D

Two observation wells penetrating into a confined aquifer are located 1500 m apart in the direction of flow. Heads of 50 m and 25 m are indicated at these two observation wells. If the coefficient of permeability for the aquifer is 30 m/day and its porosity is 0.25, the time of travel of an inert tracer from one well to another is (a) 75 days (b) 750 days (c) 1200 days (d) 3000 days

Description : Two observation wells penetrating into a confined aquifer are located 1500 m apart in the direction of flow. Heads of 50 m and 25 m are indicated at these two observation wells. If the coefficient of permeability for the ... well to another is (a) 75 days (b) 750 days (c) 1200 days (d) 3000 days

Last Answer : (b) 750 days

Audit programs generally include procedures to test actual transactions and resulting balances. These procedures are primarily designed to a. Detect irregularities that result in misstated financial statements. b. Test the adequacy of internal control. c. Gather corroborative evidence. d. Obtain information of informative disclosures

Description : Audit programs generally include procedures to test actual transactions and resulting balances. These procedures are primarily designed to a. Detect irregularities that result in misstated financial ... control. c. Gather corroborative evidence. d. Obtain information of informative disclosures

Last Answer : Gather corroborative evidence

The most critical consideration in the design of a rolled steel column carrying axial loads is the (a) Percentage elongation at yield and the net cross-sectional area (b) Critical bending strength and axial yield strength of material (c) Buckling strength based on the net area of the section and percentage elongation at ultimate load (d) Compressive strength based on slenderness ratio and gross cross-sectional area.

Description : The most critical consideration in the design of a rolled steel column carrying axial loads is the (a) Percentage elongation at yield and the net cross-sectional area (b) Critical bending ... at ultimate load (d) Compressive strength based on slenderness ratio and gross cross-sectional area.

Last Answer : (d) Compressive strength based on slenderness ratio and gross cross-sectional area.

The value of coefficient of velocity for a sharp edged orifice __________ with the head of water. (A) Decreases (B) Increases (C) Remain same (D) None of these

Description : The value of coefficient of velocity for a sharp edged orifice __________ with the head of water. (A) Decreases (B) Increases (C) Remain same (D) None of these

Last Answer : Answer: Option B

Specific yield of well is a) Discharge per unit time b) Yield of well per metre of drawdown* c) Velocity of water per unit time d)None of the above

Description : Specific yield of well is a) Discharge per unit time b) Yield of well per metre of drawdown* c) Velocity of water per unit time d)None of the above

Last Answer : b) Yield of well per metre of drawdown*

Why are there jets in the midlatitudes in the upper troposphere? (a) Air is warmer in the tropics than the poles, resulting in a poleward pressure gradient that increases with increasing height. (b) Because air near the surface experiences the drag of surface friction, while air in the upper troposphere does not. (c) Due to variations in temperature between continents and ocean. (d) Due to the constant bending by the Coriolis force. (e) Both A and D are correct.

Description : Why are there jets in the midlatitudes in the upper troposphere? (a) Air is warmer in the tropics than the poles, resulting in a poleward pressure gradient that increases with increasing height. (b) Because ... d) Due to the constant bending by the Coriolis force. (e) Both A and D are correct.

Last Answer : (e) Both A and D are correct.

For determining the velocity of flow of underground water, the most commonly used non￾empirical formula is (A) Darcy's formula (B) Slichter's formula (C) Hazen's formula (D) Lacy's formula

Description : For determining the velocity of flow of underground water, the most commonly used non￾empirical formula is  (A) Darcy's formula  (B) Slichter's formula  (C) Hazen's formula  (D) Lacy's formula 

Last Answer : (A) Darcy's formula 

With the usual meanings of letters, the equation V = 400 I (D10²/4) is used for determining the velocity of ground water flow in metres per day. It is known as (A) Meinzer's formula (B) Slichter's formula (C) Darcy's formula (D) Hazen's formula

Description : With the usual meanings of letters, the equation V = 400 I (D10²/4) is used for determining the velocity of ground water flow in metres per day. It is known as (A) Meinzer's formula (B) Slichter's formula (C) Darcy's formula (D) Hazen's formula

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The equation V = (1000 ID10²/60) × (1.8T + 42) which is used for determining the velocity of ground water flow in metres per day is known as (A) Meinzer's formula (B) Slichter's formula (C) Darcy's formula (D) Hazen formula

Description : The equation V = (1000 ID10²/60) × (1.8T + 42) which is used for determining the velocity of ground water flow in metres per day is known as (A) Meinzer's formula (B) Slichter's formula (C) Darcy's formula (D) Hazen formula

Last Answer : Answer: Option D

India’s wheat yield revolution in the 1960s was possible primarily due to (a) hybrid seeds (b) increased chlorophyll content (c) mutations resulting in plant height reduction (d) quantitative trait mutations.

Description : India’s wheat yield revolution in the 1960s was possible primarily due to (a) hybrid seeds (b) increased chlorophyll content (c) mutations resulting in plant height reduction (d) quantitative trait mutations.

Last Answer : (d) quantitative trait mutations.

Which of the following matters would an auditor most likely consider when establishing the scope of the audit?a. Audit areas where there is a higher risk of material misstatement. b. The expected audit coverage, including the number and locations of the entity's components to be included. c. The entity's timetable for reporting, such as at interim and final stages. d. The discussion with the entity's management concerning the expected communications on the status of audit work throughout the engagement and the expected deliverables resulting from the audit procedures.

Description : Which of the following matters would an auditor most likely consider when establishing the scope of the audit? a. Audit areas where there is a higher risk of material misstatement. ... status of audit work throughout the engagement and the expected deliverables resulting from the audit procedures.

Last Answer : The expected audit coverage, including the number and locations of the entity's components to be included.

The discharge in an open channel corresponding to critical depth is (A) Zero (B) Minimum (C) Maximum (D) None of these

Description : The discharge in an open channel corresponding to critical depth is (A) Zero (B) Minimum (C) Maximum (D) None of these

Last Answer : Answer: Option C

Two identical pumps, each capable of delivering 0.2 cumec, against a head of 30 m, are connected in parallel. The resulting discharge is : a) 0.4 cumec against a head of 30 m b) 0.4 cumec against a head of 60 m c) 0.2 cumec against a head of 30 m d) 0.2 cumec against a head of 60 m

Description : Two identical pumps, each capable of delivering 0.2 cumec, against a head of 30 m, are connected in parallel. The resulting discharge is : a) 0.4 cumec against a head of 30 m b) 0.4 cumec against a head of 60 m c) 0.2 cumec against a head of 30 m d) 0.2 cumec against a head of 60 m

Last Answer : a) 0.4 cumec against a head of 30 m