Larger length & diameter water pipes are made by (A) Electrical resistance welding (B) Die casting (C) Semi-centrifugal casting (D) Continuous casting

Larger length & diameter water pipes are made by
(A) Electrical resistance welding
(B) Die casting
(C) Semi-centrifugal casting
(D) Continuous casting
by

1 Answer

Answer :

options A
by

Related questions

Larger length & diameter water pipes are made by (A) Electrical resistance welding (B) Die casting (C) Semi-centrifugal casting (D) Continuous casting

Description : Larger length & diameter water pipes are made by (A) Electrical resistance welding (B) Die casting (C) Semi-centrifugal casting (D) Continuous casting

Last Answer : Option C

Cast iron and steel pipes are produced by __________ casting. (A) Die (B) Investment (C) Slush(D) True centrifugal

Description : Cast iron and steel pipes are produced by __________ casting. (A) Die (B) Investment (C) Slush (D) True centrifugal

Last Answer : (D) True centrifugal

Pick out the wrong statement. (A) Seam welding, projection welding & spot welding are the classification of electrical resistance welding (B) Electrode tip in spot welding is of copper and the tip diameter should be equal to t (where, t = plate thickness to be welded) (C) In spot welding, two pieces to be joined are overlapped and placed between two electrodes (D) Mild steel sheet cannot be spot welded

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Last Answer : (D) Mild steel sheet cannot be spot welded

Oxygen cylinders used for autogenous (cutting/welding) purposes are (A) Seamless & made of steel (B) Heat treated before use (C) Made by sand casting (D) Welded steel cylinders

Description : Oxygen cylinders used for autogenous (cutting/welding) purposes are (A) Seamless & made of steel (B) Heat treated before use (C) Made by sand casting (D) Welded steel cylinders

Last Answer : Option A

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

Description : 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

Last Answer : (C) f1 > f2

Ceramic materials fabrication cannot be done by (A) Welding (B) Slip casting (C) Extrusion (D) Plastic pressing

Description : Ceramic materials fabrication cannot be done by (A) Welding (B) Slip casting (C) Extrusion (D) Plastic pressing

Last Answer : (A) Welding

Wrought iron is never shaped by (A) Casting (B) Cold working (C) Forging (D) Welding

Description : Wrought iron is never shaped by (A) Casting (B) Cold working (C) Forging (D) Welding

Last Answer : (A) Casting

State two advantages and disadvantages of centrifugal casting. Write four applications.

Description : State two advantages and disadvantages of centrifugal casting. Write four applications.

Last Answer : Centrifugal Casting: Advantages: 1. Relatively very light impurities move inwards towards center. So they can be removed easily thus helping in producing sound castings. 2. Gates and risers are not needed. ... making rollers. 4. Piston rings. 5. Cylinder liners. 6. Pipes of water gas sewage.

In electrical resistance welding, distortion results from the use of improper (A) Clamping methods (B) Electrodes (C) Current (D) Filler material

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Chromium molybdenum steel cannot be welded using __________ welding. (A) Thermit (B) Electrical resistance (C) Oxy-acetylene (D) Any of these

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Last Answer : Option B

Pick up the correct statement from the following: (A) Air bubbles in casting produce a dull sound by tapping their surfaces lightly with a hammer (B) Cupola furnace is used for the manufacture of cast iron (C) Red short iron is of no value for welding purpose (D) All the above

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Last Answer : Answer: Option D

Glass pipes can be joined by (A) Flanges (B) Welding (C) Soldering (D) Bell and spigot joint

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Last Answer : (D) Bell and spigot joint

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

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

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In cement pressure grouting G.I pipes of diameter …… and ……length, should be fixed in drilled holes a) 12 to 20 mm, 200 mm* b) 12 to 20 mm, 300 mm c) 12 to 25 mm, 500 mm d) 20 to 25 mm, 300 mm

Description : In cement pressure grouting G.I pipes of diameter …… and ……length, should be fixed in drilled holes a) 12 to 20 mm, 200 mm* b) 12 to 20 mm, 300 mm c) 12 to 25 mm, 500 mm d) 20 to 25 mm, 300 mm

Last Answer : a) 12 to 20 mm, 200 mm*

A tube mill as compared to a ball mill (A) Employs smaller balls (B) Gives finer size reduction but consumes more power (C) Has larger length/diameter ratio (>2 as compared to 1 for ball mill) (D) All (A), (B) and (C)

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Last Answer : (D) All (A), (B) and (C)

A tube mill compared to a ball mill (A) Has a higher length/diameter ratio(B) Produces a coarser product(C) Has a higher diameter/length ratio(D) Uses much larger balls

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Last Answer : (A) Has a higher length/diameter ratio

A semi-circle of diameter 14 cm has three chords of equal length connecting the two end points of the diameter so as -Maths 9th

Description : A semi-circle of diameter 14 cm has three chords of equal length connecting the two end points of the diameter so as -Maths 9th

Last Answer : (c)\(\bigg(rac{147 imes\sqrt3}{4}\bigg)\) cm2Take the trapezoid ABCD in the semi-circle with centre O such that AD = DC = CB. Now, complete the circle and draw an identical trapezoid in the other semicircle also. Then, ADCBEF ... {1}{2}\)x \(rac{3\sqrt3}{2}\) x 49 = \(rac{147 imes\sqrt3}{4}\) cm2.

The valve commonly used in pipes larger than 2" dia is a (A) Globe valve (B) Plug-cock (C) Gate valve (D) Check valve

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Certain substances loose their electrical resistance completely at super low temperature. Such, substances are called. (1) Super conductors (2) Semi conductors (3) Dielectrics (4) Perfect conductors

Description : Certain substances loose their electrical resistance completely at super low temperature. Such, substances are called. (1) Super conductors (2) Semi conductors (3) Dielectrics (4) Perfect conductors

Last Answer : (1) Super conductors Explanation: Superconductors are materials that carry electrical current with little or no resistance when cooled, below a certain temperature. While conventional superconductors need to ... temperature superconductors do so above the boiling point of liquid nitrogen (-196 °C).

Certain substances loose their electrical resistance completely at super low temperature. Such substances are called. (1) Super conductors (2) Semi conductors (3) Dielectrics (4) Perfect conductors

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Last Answer : Super conductors

Which of the following statements about continuous cardiac output monitoring are true? A. Continuous cardiac output monitoring may unmask events not detected by intermittent cardiac output measurements. B. Continuous cardiac output monitoring by the thermodilution method requires continuous infusion of fluid injectate at a constant rate and temperature. C. The major advantage of the Fick method over the thermodilution method of calculating cardiac output is that it is noninvasive, requiring only the determination of oxygen consumption by respiratory gas analysis. D. The technique of thoracic electrical bioimpedance utilizes sensors to determine stroke volume by detecting changes in resistance to a small, applied alternating current.

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Last Answer : Answer: AD DISCUSSION: Various techniques are available to measure cardiac output continuously. The advantages of continuous cardiac output monitoring, as compared with intermittent methods, are (1) ... function of the stroke volume, which then can be used to calculate the cardiac output

Resistance of an electrical conductor is proportional to its (where, l = length and A = cross-sectional area of the conductor) (A) A (B) l (C) A2 (D) Both 'a' & 'b'

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Last Answer : (D) Both 'a' & 'b'

Swenson-Walker crystalliser is a __________ unit. (A) Continuous (B) Batch (C) Semi-batch (D) Cooling (adiabatic)-cum-evaporation

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Last Answer : (A) Continuous

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Last Answer : (C) In a continuous flow reactor, uniform concentration cannot be maintained throughout the vessel even in a well agitated system

In case of hydraulically smooth pipe, the resistance to flow depends only on the Reynolds number, whereas for a hydraulically rough pipe, the resistance to flow is governed by the relative roughness. Two pipes are said to have the same hydraulic roughness, when they have equal values of (A) Relative roughness (B) Absolute roughness (C) Friction co-efficient for flows at equal Reynold number (D) All (A), (B) & (C)

Description : In case of hydraulically smooth pipe, the resistance to flow depends only on the Reynolds number, whereas for a hydraulically rough pipe, the resistance to flow is governed by the relative roughness. Two pipes are said ... co-efficient for flows at equal Reynold number (D) All (A), (B) & (C)

Last Answer : (C) Friction co-efficient for flows at equal Reynold number

Actual lift of a pump is always less than the theoretical lift and is limited by the (A) Specific gravity & temperature of the liquid (B) Leakage & pressure decreasing at higher elevations (C) Frictional resistance through pipes, fittings & passages (D) All (A), (B) and (C)

Description : Actual lift of a pump is always less than the theoretical lift and is limited by the (A) Specific gravity & temperature of the liquid (B) Leakage & pressure decreasing at higher elevations (C) Frictional resistance through pipes, fittings & passages (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

Zinc is not used (A) For producing zinc base die casting alloys (B) In its oxide form as pigments (C) As anode for corrosion prevention in boiler (D) As an alloying element in various bronzes

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Last Answer : (D) As an alloying element in various bronzes

The most suitable material for die casting is (A) Iron (B) Copper (C) Steel (D) Nickel

Description : The most suitable material for die casting is (A) Iron (B) Copper (C) Steel (D) Nickel

Last Answer : (B) Copper

A jet engine turbine blade is normally manufactured by (A) Forging (B) Shell moulding (C) Investment casting (D) Pressure die casting

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Last Answer : (C) Investment casting

Pick out the wrong statement about cavitation. (A) Sudden reduction of pressure in a fluid flow system caused by flow separation, vortex formation or abrupt closing of valve leads to cavitation (B) Cavitation may be caused due to boiling of liquid by decreasing the pressure resulting in formation & collapse of vapor cavities (C) Cavitation begins at higher static pressure and lower velocity in larger diameter pipelines resulting in audible noise(D) Large scale cavitation cannot damage pipeline, restrict fluid flow anddamage steam turbine blades

Description : Pick out the wrong statement about cavitation. (A) Sudden reduction of pressure in a fluid flow system caused by flow separation, vortex formation or abrupt closing of valve leads to cavitation ... (D) Large scale cavitation cannot damage pipeline, restrict fluid flow and damage steam turbine blades

Last Answer : (D) Large scale cavitation cannot damage pipeline, restrict fluid flow and damage steam turbine blades

The diameter of the column head support a flat slab, is generally kept (A) 0.25 times the span length (B) 0.25 times the diameter of the column (C) 4.0 cm larger than the diameter of the column (D) 5.0 cm larger than the diameter of the column

Description : The diameter of the column head support a flat slab, is generally kept (A) 0.25 times the span length (B) 0.25 times the diameter of the column (C) 4.0 cm larger than the diameter of the column (D) 5.0 cm larger than the diameter of the column

Last Answer : Option A

Projection welding & stud welding is categorised as the __________ welding. (A) Pressure (B) Thermit (C) Resistance (D) Arc

Description : Projection welding & stud welding is categorised as the __________ welding. (A) Pressure (B) Thermit (C) Resistance (D) Arc

Last Answer : C) Resistance

In finish machining of an island on a casting with CNC milling machine, an end mill with 10 mm diameter is employed. The corner points of the island are represented by (0, 0), (0, 30), (50, 30) and (50, 0). By applying cutter radius right compensation, the trajectory of the cutter will be a.(-5, 0), (-5, 35), (55, 35), (55,-5), (-5,-5) b.(0,-5), (55,-5), (55, 35), (-5, 35), (-5,-5) c.(5, 5), (5, 25), (45, 25), (45, 5), (5, 5) d.(5, 5), (45, 5), (45, 25), (5, 25), (5, 5)

Description : In finish machining of an island on a casting with CNC milling machine, an end mill with 10 mm diameter is employed. The corner points of the island are represented by (0, 0), (0, 30), (50, 30) and (50, 0). By applying cutter radius right ... , 5), (5, 5) d.(5, 5), (45, 5), (45, 25), (5, 25), (5, 5)

Last Answer : a.(-5, 0), (-5, 35), (55, 35), (55,-5), (-5,-5)

In which of the following operations Continuous Path System is used (A) Pick and Place (B) Loading and Unloading (C) Continuous welding

Description : In which of the following operations Continuous Path System is used (A) Pick and Place (B) Loading and Unloading (C) Continuous welding

Last Answer : C

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 

A butt weld has been made by MMA in a 50mm thick impact tested steel plate. The welding electrode used was a basic type, 5mm diameter. The measured welding parameters for one of the runs was 250 amps, 24 volts, using DC+ve polarity, and a ROL:of 180mm per min. What would be the arc energy? a) Insufficient information given to calculate the arc energy b) 1.9 kJ/mm c) 1.87 kJ/mm d) 2.0 kJ/mm

Description : A butt weld has been made by MMA in a 50mm thick impact tested steel plate. The welding electrode used was a basic type, 5mm diameter. The measured welding parameters for one of the runs was 250 amps, 24 volts, using DC ... given to calculate the arc energy b) 1.9 kJ/mm c) 1.87 kJ/mm d) 2.0 kJ/mm

Last Answer : d) 2.0 kJ/mm

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

The most economical flow control valve for use with large diameter pipes is a (A) Butterfly valve (B) Globe valve (C) Needle valve (D) None of these

Description : The most economical flow control valve for use with large diameter pipes is a (A) Butterfly valve (B) Globe valve (C) Needle valve (D) None of these

Last Answer : (A) Butterfly valve

Pipes having diameter 14 inches or more are designated by their (A) Outside diameter (B) Inside diameter (C) Schedule number (D) None of these

Description : Pipes having diameter 14 inches or more are designated by their (A) Outside diameter (B) Inside diameter (C) Schedule number (D) None of these

Last Answer : (A) Outside diamete

All pipes of a particular nominal size have the same (A) Inside diameter (B) Outside diameter (C) Thickness (D) None of these

Description : All pipes of a particular nominal size have the same (A) Inside diameter (B) Outside diameter (C) Thickness (D) None of these

Last Answer : (B) Outside diameter

Two fluids are flowing through two similar pipes of the same diameter. The Reynold's number is same. For the same flow rate if the viscosity of a fluid is reduced to half the value of the first fluid, the pressure drop will (A) Increase (B) Decrease (C) Remain unchanged (D) Data insufficient to predict relative pressure drop

Description : Two fluids are flowing through two similar pipes of the same diameter. The Reynold's number is same. For the same flow rate if the viscosity of a fluid is reduced to half the value of the ... (A) Increase (B) Decrease (C) Remain unchanged (D) Data insufficient to predict relative pressure drop

Last Answer : (B) Decrease

Large diameter reinforced cement concrete (RCC) pipes are generally joined by __________ joint. (A) Flanged iron (B) Collar (C) Flexible (D) Expansion

Description : Large diameter reinforced cement concrete (RCC) pipes are generally joined by __________ joint. (A) Flanged iron (B) Collar (C) Flexible (D) Expansion

Last Answer : Option B

Consider a centrifugal pump having a specific impeller diameter, fixed impeller speed pumping a liquid of constant density at a particular discharge capacity. With decrease in the capacity of the pump, the __________ decreases. (A) NPSH required (B) BHP required by the pump (C) Head of the liquid pumped (D) All (A), (B) and (C)

Description : Consider a centrifugal pump having a specific impeller diameter, fixed impeller speed pumping a liquid of constant density at a particular discharge capacity. With decrease in the capacity of the pump, the __________ decreases. (A) ... the pump (C) Head of the liquid pumped (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

With a constant diameter impeller of a centrifugal pump (A) Its capacity varies directly as the square of speed (B) Head varies as the square of speed (C) Horsepower input varies as the square of speed (D) Head varies as the speed

Description : With a constant diameter impeller of a centrifugal pump (A) Its capacity varies directly as the square of speed (B) Head varies as the square of speed (C) Horsepower input varies as the square of speed (D) Head varies as the speed

Last Answer : (B) Head varies as the square of speed

Head developed by a centrifugal pump depends on its (A) Speed (B) Impeller diameter (C) Both (A) and (B) (D) Neither (A) nor (B)

Description : Head developed by a centrifugal pump depends on its (A) Speed (B) Impeller diameter (C) Both (A) and (B) (D) Neither (A) nor (B)

Last Answer : C) Both (A) and (B)

Which is the correct relationship for a centrifugal pump? (Where, D = Impeller diameter, inches H = Head developed, ft of liquid pumped N = Speed of pump, rpm) (A) D = 1840 H0.5 /N (B) D = 1840 N/H0.5 (C) H = 1840 D0.5 /N (D) D = 1840 H/N

Description : Which is the correct relationship for a centrifugal pump? (Where, D = Impeller diameter, inches H = Head developed, ft of liquid pumped N = Speed of pump, rpm) (A) D = 1840 H0.5 /N (B) D = 1840 N/H0.5 (C) H = 1840 D0.5 /N (D) D = 1840 H/N

Last Answer : (A) D = 1840 H0.5 /N

At a constant speed of the centrifugal pump, it’s __________ the impeller diameter. (A) Capacity varies directly with (B) Head varies as the square of (C) Horsepower varies as the cube of (D) All (A), (B) and (C)

Description : At a constant speed of the centrifugal pump, it’s __________ the impeller diameter. (A) Capacity varies directly with (B) Head varies as the square of (C) Horsepower varies as the cube of (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

In case of a centrifugal pump, the theoretical head developed is dependent on the __________ the impeller. (A) Speed of (B) Diameter of (C) Fluid velocity leaving (D) All (A), (B) and (C)

Description : In case of a centrifugal pump, the theoretical head developed is dependent on the __________ the impeller. (A) Speed of (B) Diameter of (C) Fluid velocity leaving (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

The capacity of a centrifugal pump Can be increased by increasing the (A) Impeller diameter or speed (B) Number of pumps and joining them in series (C) Number of pumps and joining them in parallel (D) All (A), (B) and (C)

Description : The capacity of a centrifugal pump Can be increased by increasing the (A) Impeller diameter or speed (B) Number of pumps and joining them in series (C) Number of pumps and joining them in parallel (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)