Select the wrong statement (A) An equivalent pipe is treated as an ordinary pipe for all calculations (B) The length of an equivalent pipe is equal to that of a compound pipe (C) The discharge through an equivalent pipe is equal to that of a compound pipe (D) The diameter of an equivalent pipe is equal to that of a compound pipe

Select the wrong statement
(A) An equivalent pipe is treated as an ordinary pipe for all calculations
(B) The length of an equivalent pipe is equal to that of a compound pipe
(C) The discharge through an equivalent pipe is equal to that of a compound pipe
(D) The diameter of an equivalent pipe is equal to that of a compound pipe
by

1 Answer

Answer :

Answer: Option D
by

Related questions

A compound pipe is required to be replaced by a new pipe. The two pipes are said to be equivalent, if (A) Length of both the pipes is same (B) Diameter of both the pipes is same (C) Loss of head and discharge of both the pipes is same (D) Loss of head and velocity of flow in both the pipes is same

Description : A compound pipe is required to be replaced by a new pipe. The two pipes are said to be equivalent, if (A) Length of both the pipes is same (B) Diameter of both the pipes is same (C) Loss of ... discharge of both the pipes is same (D) Loss of head and velocity of flow in both the pipes is same

Last Answer : Answer: Option C

A compound pipe of diameter d1, d2 and d3 having lengths l1, l2 and l3 is to be replaced by an equivalent pipe of uniform diameter d and of the same length (l) as that of the compound pipe. The size of the equivalent pipe is given by (A) l/d² = + + (B) l/d³ = + ) + (C) = + + (D)

Description : A compound pipe of diameter d1, d2 and d3 having lengths l1, l2 and l3 is to be replaced by an equivalent pipe of uniform diameter d and of the same length (l) as that of the compound pipe. The size of the equivalent pipe is given by (A) l/d² = + + (B) l/d³ = + ) + (C) = + + (D)

Last Answer : Answer: Option D

Which of the following two quantities when same, makes one pipe system equivalent to another pipe system? (A) Head & discharge(B) Length & discharge(C) Length & diameter(D) Friction factor & diameter

Description : Which of the following two quantities when same, makes one pipe system equivalent to another pipe system? (A) Head & discharge (B) Length & discharge (C) Length & diameter (D) Friction factor & diameter

Last Answer : (A) Head & discharge

Two pipe systems can be said to be equivalent, when the following quantities are same (A) Friction loss and flow (B) Length and diameter (C) Flow and length (D) Friction factor and diameter

Description : Two pipe systems can be said to be equivalent, when the following quantities are same (A) Friction loss and flow (B) Length and diameter (C) Flow and length (D) Friction factor and diameter

Last Answer : Answer: Option A

Select the wrong statement pertaining to flow of an incompressible fluid through a Venturimeter. (A) For frictionless flow, the fluid pressure entering the venturi meter will be exactly equal to that leaving the Venturimeter(B) Discharge of fluid through a Venturimeter depends upon the gagedifference irrespective of the orientation of Venturimeter(C) Venturimeter occupies less space than an orificemeter(D) Venturimeter incurs less power loss compared to an equivalentorificemeter

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Last Answer : (C) Venturimeter occupies less space than an orificemeter

Select the correct statement. (A) The discharge through a Venturimeter depends upon Δp only and isindependent of orientation of the meter(B) A Venturimeter with a given gage difference discharges at a greater rate,when the flow is vertically downward through it, than when the flow is verticallyupward(C) For a given pressure difference, the discharge of gas is greater through aVenturimeter, when compressibility is taken into account, than when it isneglected(D) The overall pressure loss is the same in a given pipe line, whether aVenturimeter or a nozzle with the same throat dia is used

Description : Sele(A) The discharge through a Venturimeter depends upon Δp only and isindependent of orientation of the meterct the correct statement. (B) A Venturimeter with a given gage difference discharges at a ... a given pipe line, whether a Venturimeter or a nozzle with the same throat dia is used

Last Answer : (A) The discharge through a Venturimeter depends upon Δp only and isindependent of orientation of the meterct the correct statement

Select the correct statement. (A) The discharge through a Venturimeter depends upon Δp only and isindependent of orientation of the meter(B) A Venturimeter with a given gage difference discharges at a greater rate,when the flow is vertically downward through it, than when the flow is verticallyupward(C) For a given pressure difference, the discharge of gas is greater through aVenturimeter, when compressibility is taken into account, than when it isneglected(D) The overall pressure loss is the same in a given pipe line, whether aVenturimeter or a nozzle with the same throat dia is used

Description : Select the correct statement. (A) The discharge through a Venturimeter depends upon Δp only and isindependent of orientation of the meter (B) A Venturimeter with a given gage difference discharges at a ... a given pipe line, whether a Venturimeter or a nozzle with the same throat dia is used

Last Answer : (A) The discharge through a Venturimeter depends upon Δp only and isindependent of orientation of the meter

The discharge co-efficient for an orifice meter does not depend upon the (A) Pipe length (B) Ratio of pipe diameter to orifice diameter (C) Type of orifice & the Reynolds number (D) Pipe diameter

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Last Answer : (A) Pipe length

Which of the following statement is wrong? (A) A flow whose streamline is represented by a curve is called two dimensional flow. (B) The total energy of a liquid particle is the sum of potential energy, kinetic energy and pressure energy. (C) The length of divergent portion in a Venturimeter is equal to the convergent portion. (D) A pitot tube is used to measure the velocity of flow at the required point in a pipe.

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Last Answer : Answer: Option C

If Q is discharge is cubic metres per sec and D is the economical diameter of the pipe. According to Lea (A) D = 0.67 to 0.87 Q (B) D = 0.77 to 0.97 Q (C) D = 0.97 to 1.22 Q (D) D = 1.22 to 1.33 Q

Description : If Q is discharge is cubic metres per sec and D is the economical diameter of the pipe. According to Lea (A) D = 0.67 to 0.87 Q (B) D = 0.77 to 0.97 Q (C) D = 0.97 to 1.22 Q (D) D = 1.22 to 1.33 Q

Last Answer : (C) D = 0.97 to 1.22 Q

If discharge of a pump is 0.16 cumecs, the economic diameter of pipe, is (A) 0.488 m (B) 4.88 cm (C) 48.8 cm (D) 4.88 m

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Last Answer : (A) 0.488 m 

For calculation of economical diameter D of a pipe in metres for a discharge Q to be pumped in cumecs, Lea suggested the empirical formula (A) D = 0.22 Q (B) D = 1.22 Q (C) D = 2.22 Q (D) D = 3.22 Q

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Last Answer : (B) D = 1.22 Q

Discharge in laminar flow through a pipe varies (A) As the square of the radius (B) Inversely as the pressure drop (C) Inversely as the viscosity (D) As the square of the diameter

Description : Discharge in laminar flow through a pipe varies (A) As the square of the radius (B) Inversely as the pressure drop (C) Inversely as the viscosity (D) As the square of the diameter

Last Answer : (A) As the square of the radius

The maximum discharge through a circular channel takes place, when the depth of the fluid flow is __________ times the pipe diameter. (A) 0.25 (B) 0.5 (C) 0.66 (D) 0.95

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Last Answer : (D) 0.95

The discharge through a convergent mouthpiece is __________ the discharge through an internal mouthpiece of the same diameter and head of water. (A) Equal to (B) One-half (C) Three fourth (D) Double

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Last Answer : Answer: Option D

Pick out the wrong statement. (A) In case of heat transfer by purely forced convection, GR /Re 2 ≤ 1 (B) The equivalent diameter of heat transfer for a duct of square cross￾section (having each side as 'x') is equal to 4x (C) Distillation process is not the same as evaporation (D) The effectiveness of nucleate boiling depends basically on the ease with which the bubbles are formed and detached from the heating surface

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Pick out the wrong statement. (A) The equivalent stiffness of two springs (of equal stiffness 'S') in series is S/2 while in parallel is 2S (B) For a helical spring, deflection is proportional to D3(D = mean coil diameter) or d4(d = wire diameter) (C) Crushing load or columns is less than the buckling load (D) Modulus of resilience is proportional to (stress at elastic limit)2

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Last Answer : (C) Crushing load or columns is less than the buckling load

Consider two pipes of same length and diameter through which water is passed at the same velocity. The friction factor for rough pipe is f1 and that for smooth pipe is f2 . Pick out the correct statement(A) f1 = f2 (B) f1 < f2 (C) f1 > f2 (D) Data not sufficient to relate f1 & f2

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Last Answer : (C) f1 > f2

Pick up the incorrect statement regarding a master trap from the following: (A) It is provided in between the lower end of the house drain and the street sewer (B) It is provided a cleaning eye at the top of the trap (C) The mica flap valve which opens inwards only, is fitted at the top of the inlet pipe (D) The water seal is less than that of ordinary traps

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Last Answer : (D) The water seal is less than that of ordinary traps

Pick up the correct statement from the following: (A) Deposition of calcium carbonate on the inside of the well pipe, causes incrustation of the pipe (B) Incrustation of the pipe reduces the discharge (C) Acidic waters cause corrosion of the pipes (D) All the above

Description : Pick up the correct statement from the following:  (A) Deposition of calcium carbonate on the inside of the well pipe, causes incrustation of the  pipe  (B) Incrustation of the pipe reduces the discharge  (C) Acidic waters cause corrosion of the pipes  (D) All the above 

Last Answer : (D) All the above 

149 The power transmitted through a pipe is (where w = Specific weight in N/m3 , and Q = Discharge in m 3 /s) (A) w × Q × H (B) w × Q × hf (C) w × Q (H - hf ) (D) w × Q (H + hf )

Description : 149 The power transmitted through a pipe is (where w = Specific weight in N/m3 , and Q = Discharge in m 3 /s) (A) w × Q × H (B) w × Q × hf (C) w × Q (H - hf ) (D) w × Q (H + hf )

Last Answer : Answer: Option C

A pitot tube is used to measure the (A) Velocity of flow at the required point in a pipe (B) Pressure difference between two points in a pipe (C) Total pressure of liquid flowing in a pipe (D) Discharge through a pipe

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Last Answer : Answer: Option A

Consider the following statements in respect of steady laminar flow through a circular pipe: 1. Shear stress is zero on the central axis of the pipe 2. Discharge varies directly with the viscosity of the fluid 3. Velocity is maximum at the centre of the pipe. 4. Hydraulic gradient varies as the square of the mean velocity of flow. Which of these statements are correct? (a) 1, 2 , 3 & 4 (b) 1 & 3 only (c) 2 & 4 only (d)3 & 4 only

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Last Answer : (b) 1 & 3 only

In parallel pipe problems, the (A) Head loss is the same through each pipe (B) Discharge is the same through all the pipes (C) Total head loss is equal to the sum of the head losses through each pipe (D) None of these

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Last Answer : (A) Head loss is the same through each pipe

To pump water from a water reservoir 3 m deep and maximum water level at 135 m, a pump is installed to lift water up to R.L. 175 m at a constant rate of 36,00,000 litres per hour. If the length of the pipe is 1506 m and f = 0.01, ignoring other minor losses and assuming the economical diameter from Lea's formula D = 1.2 Q, the water horse power of the pump is (A) 400 (B) 450 (C) 500(D) 600

Description : To pump water from a water reservoir 3 m deep and maximum water level at 135 m, a pump is  installed to lift water up to R.L. 175 m at a constant rate of 36,00,000 litres per hour. If the length  of the ... the water horse power of the pump is  (A) 400  (B) 450  (C) 500 (D) 600

Last Answer : (D) 600

A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a (A) Notch (B) Weir (C) Mouthpiece (D) Nozzle

Description : A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a (A) Notch (B) Weir (C) Mouthpiece (D) Nozzle

Last Answer : Answer: Option C

According to Darcy's formula, the loss of head due to friction in the pipe is (where f = Darcy's coefficient, l = Length of pipe, v = Velocity of liquid in pipe, and d = Diameter of pipe) (A) flv²/2gd (B) flv²/gd (C) 3flv²/2gd (D) 4flv²/2gd

Description : According to Darcy's formula, the loss of head due to friction in the pipe is (where f = Darcy's coefficient, l = Length of pipe, v = Velocity of liquid in pipe, and d = Diameter of pipe) (A) flv²/2gd (B) flv²/gd (C) 3flv²/2gd (D) 4flv²/2gd

Last Answer : Answer: Option D

The loss of head due to viscosity for laminar flow in pipes is (where d = Diameter of pipe, l = Length of pipe, v w = Specific weight of the flowing liquid) (A) 4 (B) 8 (C) 16 (D) 32

Description : The loss of head due to viscosity for laminar flow in pipes is (where d = Diameter of pipe, l = Length of pipe, v w = Specific weight of the flowing liquid) (A) 4 (B) 8 (C) 16 (D) 32

Last Answer : Answer: Option D

Transition length for turbulent flow in smooth pipe is equal to __________ times the pipe diameter. (A) 0.5 (B) 5 (C) 50 (D) 500

Description : Transition length for turbulent flow in smooth pipe is equal to __________ times the pipe diameter. (A) 0.5 (B) 5 (C) 50 (D) 500

Last Answer : (C) 50

Pick out the wrong statement. (A) 'Solvates' are chemical compounds formed by solute with their solvents. When water is the solvent, then it is called a 'hydrate' (B) In heat exchanger calculations (Δt) weighted is used in place of Δt, when it involves more than one sequence of heating or cooling i.e., desuperheating & condensation or condensation & sub-cooling (C) Heat transfer co-efficient during nucleate boiling is not influenced by the agitation imparted (D) In case of short tube vertical evaporators, area of central downtake is about 50 to 100% of the total tube cross-sectional area

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Last Answer : (C) Heat transfer co-efficient during nucleate boiling is not influenced by the agitation imparted

For laminar flow of Newtonian fluids through a circular pipe, for a given pressure drop and length & diameter of pipe, the velocity of fluid is proportional to (where, μ = fluid viscosity ) (A) μ (B) 1/μ (C) √μ (D) 1/√μ

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Last Answer : (B) 1/μ

The pressure drop per unit length for laminar flow of fluid through a long pipe is proportional to (where, A = cross-sectional area of the pipe & D = Diameter of the pipe) (A) A (B) D (C) 1/A (D) 1/A2

Description : The pressure drop per unit length for laminar flow of fluid through a long pipe is proportional to (where, A = cross-sectional area of the pipe & D = Diameter of the pipe) (A) A (B) D (C) 1/A (D) 1/A2

Last Answer : (C) 1/A

Transition from laminar flow to turbulent flow in fluid flow through a pipe does not depend upon the (A) Length of the pipe (B) Diameter of the pipe (C) Density of the fluid (D) Velocity of the fluid

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Last Answer : (A) Length of the pipe

The discharge through a channel of circular section will be maximum when the depth of water is __________ the diameter of the circular channel. (A) 0.34 times (B) 0.67 times (C) 0.81 times (D) 0.95 times

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Last Answer : Answer: Option D

The equivalent diameter for the annulus of a double pipe heat exchanger, whose inner pipe has fins on the outside is __________ compared to the same size pipes without fins. (A) More (B) Less (C) Same (D) Unpredictable

Description : The equivalent diameter for the annulus of a double pipe heat exchanger, whose inner pipe has fins on the outside is __________ compared to the same size pipes without fins. (A) More (B) Less (C) Same (D) Unpredictable

Last Answer : (B) Less

Steel pipe are (A) Suitable for withstanding high internal pressure (B) Connected by riveted or welded joints (C) Generally laid underground and no expansion joint is required (D) Likely to last 100 years under ordinary conditions

Description : Steel pipe are  (A) Suitable for withstanding high internal pressure  (B) Connected by riveted or welded joints  (C) Generally laid underground and no expansion joint is required  (D) Likely to last 100 years under ordinary conditions 

Last Answer : (D) Likely to last 100 years under ordinary conditions 

A venturi-flume is used to measure (A) Pressure of liquid (B) Discharge of liquid (C) Pressure difference between two points in a channel (D) Pressure difference between two points in a pipe

Description : A venturi-flume is used to measure (A) Pressure of liquid (B) Discharge of liquid (C) Pressure difference between two points in a channel (D) Pressure difference between two points in a pipe

Last Answer : Answer: Option B

Venturimeter is used to (A) Measure the velocity of a flowing liquid (B) Measure the pressure of a flowing liquid (C) Measure the discharge of liquid flowing in a pipe (D) Measure the pressure difference of liquid flowing between two points in a pipe line

Description : Venturimeter is used to (A) Measure the velocity of a flowing liquid (B) Measure the pressure of a flowing liquid (C) Measure the discharge of liquid flowing in a pipe (D) Measure the pressure difference of liquid flowing between two points in a pipe line

Last Answer : Answer: Option C

Pick out the wrong statement. (A) The shear stress at the pipe (dia = D, length = L) wall in case of laminar flow of Newtonian fluids is (D/4L). ∆p (B) In the equation, T. gc = k. (du/dy) n the value of 'n' for pseudoplastic and Dilatant fluid are < 1 and >1 respectively (C) Shear stress for Newtonian fluid is proportional to the rate of shear in the direction perpendicular to motion (D) With increase in the Mach number >0.6, the drag co-efficient decreases in case of compressible fluids

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Last Answer : (D) With increase in the Mach number >0.6, the drag co-efficient decreases in case of compressible fluids

If the velocity of flow as well as the diameter of the flowing pipe are respectively doubled through a pipe system in use since long, the head loss will thereafter be (a) Halved (b) Doubled (c) Increased 4 times (d) No change

Description : If the velocity of flow as well as the diameter of the flowing pipe are respectively doubled through a pipe system in use since long, the head loss will thereafter be (a) Halved (b) Doubled (c) Increased 4 times (d) No change

Last Answer : (b) Doubled

At Pr > 1, conduction in an ordinary fluid flowing through a heated pipe is limited to the (A) Buffer zone (B) Turbulent core (C) Both (A) and (B) (D) Viscous sub-layer

Description : At Pr > 1, conduction in an ordinary fluid flowing through a heated pipe is limited to the (A) Buffer zone (B) Turbulent core (C) Both (A) and (B) (D) Viscous sub-layer

Last Answer : (D) Viscous sub-layer

In case of unsteady fluid flow, conditions & flow pattern change with the passage of time at a position in a flow situation. Which of the following is an example of unsteady flow? (A) Discharge of water by a centrifugal pump being run at a constant rpm (B) Water flow in the suction and discharge pipe of a reciprocating pump (C) Water discharge from a vertical vessel in which constant level is maintained (D) Low velocity flow of a highly viscous liquid through a hydraulically smooth pipe

Description : In case of unsteady fluid flow, conditions & flow pattern change with the passage of time at a position in a flow situation. Which of the following is an example of unsteady flow? (A) ... level is maintained (D) Low velocity flow of a highly viscous liquid through a hydraulically smooth pipe

Last Answer : (B) Water flow in the suction and discharge pipe of a reciprocating pump

The research work is not influenced by Options: A) The researcher himself B) His pre-established assumptions C) The curse of some other researchers D) The wrong calculations

Description : The research work is not influenced by Options: A) The researcher himself B) His pre-established assumptions C) The curse of some other researchers D) The wrong calculations

Last Answer : C) The curse of some other researchers

The shock absorbing capacity of a bolt can be increased by (A) Increasing shank diameter (B) Making shank diameter equal to core diameter of threads (C) Using castle nut in place of ordinary hexagonal nut (D) Using a washer

Description : The shock absorbing capacity of a bolt can be increased by (A) Increasing shank diameter (B) Making shank diameter equal to core diameter of threads (C) Using castle nut in place of ordinary hexagonal nut (D) Using a washer

Last Answer : (B) Making shank diameter equal to core diameter of threads

. Equivalent length of a pipe fitting is (A) Dependent on Reynolds number (B) Independent of Reynolds number (C) Dependent on the length of the pipe (D) None of these

Description : . Equivalent length of a pipe fitting is (A) Dependent on Reynolds number (B) Independent of Reynolds number (C) Dependent on the length of the pipe (D) None of these

Last Answer : (A) Dependent on Reynolds number

Pick up the incorrect statement from the following: (A) The flow in strainer type wells is radial (B) The flow in cavity type wells in spherical(C) In strainer type wells, area of flow depends upon the length of the strainer pipe (D) In cavity type wells, area of flow depends upon the size of the cavity

Description : Pick up the incorrect statement from the following:  (A) The flow in strainer type wells is radial  (B) The flow in cavity type wells in spherical  (C) In strainer type wells, area of flow ... pipe  (D) In cavity type wells, area of flow depends upon the size of the cavity 

Last Answer : (C) In strainer type wells, area of flow depends upon the length of the strainer pipe 

In a hot water heating system, there is cylindrical pipe of length 28 m and diameter 5 cm. Find the total radiating surface in the system. -Maths 9th

Description : In a hot water heating system, there is cylindrical pipe of length 28 m and diameter 5 cm. Find the total radiating surface in the system. -Maths 9th

Last Answer : Height of cylindrical pipe = Length of cylindrical pipe = 28m Radius of circular end of pipe = diameter/ 2 = 5/2 cm = 2.5cm = 0.025m Now, CSA of cylindrical pipe = 2πrh, where r = radius and h = height of ... = 2 (22/7) 0.025 28 m2 = 4.4m2 The area of the radiating surface of the system is 4.4m2.