Air vessel of a reciprocating pump is initially filled with (A) Atmospheric air (B) Compressed air (C) Water (D) None of these

Air vessel of a reciprocating pump is initially filled with
(A) Atmospheric air
(B) Compressed air
(C) Water
(D) None of these
by

1 Answer

Answer :

(B) Compressed air
by

Related questions

At what value of crank angle (roughly), no flow of water from or into the air vessel takes place in case of a double acting reciprocating pump? (A) 40° and 140° (B) 45° and 60° (C) 90° and 80° (D) 20° and 120°

Description : At what value of crank angle (roughly), no flow of water from or into the air vessel takes place in case of a double acting reciprocating pump? (A) 40° and 140° (B) 45° and 60° (C) 90° and 80° (D) 20° and 120°

Last Answer : (A) 40° and 140

Air vessel provided in a reciprocating pump is for (A) Increasing the acceleration head (B) Making the friction in pipe uniform (C) Decreasing the acceleration head (D) None of these

Description : Air vessel provided in a reciprocating pump is for (A) Increasing the acceleration head (B) Making the friction in pipe uniform (C) Decreasing the acceleration head (D) None of these

Last Answer : (B) Making the friction in pipe uniform

Air vessel provided in a reciprocating pump (A) Smoothens the flow by avoiding pulsations (B) Increases the volumetric efficiency of the pump (C) Saves the pump from the danger of cavitation (D) None of these

Description : Air vessel provided in a reciprocating pump (A) Smoothens the flow by avoiding pulsations (B) Increases the volumetric efficiency of the pump (C) Saves the pump from the danger of cavitation (D) None of these

Last Answer : (D) None of these

Function of air vessel provided in a reciprocating pump is to (A) Reduce discharge fluctuation (B) Reduce the danger of cavitation (C) Avoid the necessity of priming (D) Increase the pump efficiency

Description : Function of air vessel provided in a reciprocating pump is to (A) Reduce discharge fluctuation (B) Reduce the danger of cavitation (C) Avoid the necessity of priming (D) Increase the pump efficiency

Last Answer : (A) Reduce discharge fluctuation

Air vessel fitted to a reciprocating pump (A) Increases the work done (B) Decreases the work done (C) Causes cavitation (D) Results in non-uniform discharge

Description : Air vessel fitted to a reciprocating pump (A) Increases the work done (B) Decreases the work done (C) Causes cavitation (D) Results in non-uniform discharge

Last Answer : (B) Decreases the work done

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

A vessel contains milk and water in the ratio of 4:3. If 14 litres of the mixture is drawn and filled with water, the ratio changes to 3:4. How much milk was there in the vessel initially? a) 24 b) 32 c) 40 d) 48 e) None of these

Description : A vessel contains milk and water in the ratio of 4:3. If 14 litres of the mixture is drawn and filled with water, the ratio changes to 3:4. How much milk was there in the vessel initially? a) 24 b) 32 c) 40 d) 48 e) None of these

Last Answer : Answer: B milk = 4x and water = 3x milk = 4x – 14*4/7 and water = 3x – 14*3/7 + 14 4x – 8: 3x + 8 = 3:4 X = 8, so milk = 8*4 = 32 litres

Purpose of air lift pump is to (A) Compress air (B) Lift compressed air (C) Lift water from a well by using compressed air (D) Lift air under negative pressure

Description : Purpose of air lift pump is to (A) Compress air (B) Lift compressed air (C) Lift water from a well by using compressed air (D) Lift air under negative pressure

Last Answer : (C) Lift water from a well by using compressed air

In most of the vacuum crystalliser, vacuum is generally produced by means of a (A) Suction pump (B) Compressed air jet (C) Steam jet ejector with a barometric condenser (D) None of these

Description : In most of the vacuum crystalliser, vacuum is generally produced by means of a (A) Suction pump (B) Compressed air jet (C) Steam jet ejector with a barometric condenser (D) None of these

Last Answer : (C) Steam jet ejector with a barometric condenser

In a naturally aspirated diesel engine, the air is supplied by a A. supercharger B. centrifugal pump C. movement of engine piston D. reciprocating pump

Description : In a naturally aspirated diesel engine, the air is supplied by a A. supercharger B. centrifugal pump C. movement of engine piston D. reciprocating pump

Last Answer : ANSWER : C

Q No: 131 The most widely used pump for lifting sewage is A. Centrifugal pump B. Reciprocating pump C. Pneumatic ejector D. Air pressure pump

Description : Q No: 131 The most widely used pump for lifting sewage is A. Centrifugal pump B. Reciprocating pump C. Pneumatic ejector D. Air pressure pump

Last Answer : ANS: A

Consider the following statements: Air vessels are fitted on the suction and delivery sides of a reciprocating pump to 1. Achieve higher speed without separation. 2. Reduce work in overcoming frictional resistance. 3. Avoid excessive vibration permanently. 4. Have nearly uniform discharge. Which of these statements are corrects? (a) 1, 2 & 4 only (b) 1, 2 & 3 only (c) 2, 3 & 4 only (d) 1, 2, 3 & 4

Description : Consider the following statements: Air vessels are fitted on the suction and delivery sides of a reciprocating pump to 1. Achieve higher speed without separation. 2. Reduce work in overcoming frictional resistance. 3. Avoid excessive vibration ... 2 & 3 only (c) 2, 3 & 4 only (d) 1, 2, 3 & 4

Last Answer : (d) 1, 2, 3 & 4

A spring of stiffness 100 N/mm used in a spring-loaded safety valve of diameter 20 mm on a boiler with the pressure inside the boiler equal to 1 MPa should be initially compressed by a. 5mm b. 3.14 mm c. 2mm d. 6.28 mm

Description : A spring of stiffness 100 N/mm used in a spring-loaded safety valve of diameter 20 mm on a boiler with the pressure inside the boiler equal to 1 MPa should be initially compressed by a. 5mm b. 3.14 mm c. 2mm d. 6.28 mm

Last Answer : b. 3.14 mm

Boiler feed water pump is usually a __________ pump.(A) Reciprocating (B) Gear (C) Multistage centrifugal (D) Diaphragm

Description : Boiler feed water pump is usually a __________ pump. (A) Reciprocating (B) Gear (C) Multistage centrifugal (D) Diaphragm

Last Answer : (C) Multistage centrifugal

Compressed air coming out from a punctured football  (a) becomes hotter  (b) becomes cooler1  (c) remains at the same temperature  (d) may become hotter or cooler depend-ing upon the humidity of the surround¬ing air  (e) attains atmospheric temperature.

Description : Compressed air coming out from a punctured football  (a) becomes hotter  (b) becomes cooler1  (c) remains at the same temperature  (d) may become hotter or cooler depend-ing upon the humidity of the surround¬ing air  (e) attains atmospheric temperature.

Last Answer : (b) becomes cooler1

Which of the following situations can be approximated to a steady state heat transfer system? (A) A red hot steel slab (having outside surface temperature as 1300°C) exposed to the atmospheric air at 35°C (B) 10 kg of dry saturated steam at 8 kgf/cm2 flowing through a short length of stainless steel pipe exposed to atmospheric air at 35°C (C) Boiling brine kept in open vessel when the bottom surface temperature of the vessel is maintained constant at 180°C (D) A sub-cooled refrigerant liquid at 8°C flowing at the rate of 6 Kg/minute through a copper pipe exposed to atmospheric air at 35°C

Description : Which of the following situations can be approximated to a steady state heat transfer system? (A) A red hot steel slab (having outside surface temperature as 1300°C) exposed to the atmospheric air at ... flowing at the rate of 6 Kg/minute through a copper pipe exposed to atmospheric air at 35°C

Last Answer : (B) 10 kg of dry saturated steam at 8 kgf/cm2 flowing through a short length of stainless steel pipe exposed to atmospheric air at 35°C

When you push down on the piston of a bicycle pump, the air is compressed into a smaller volume, which causes its temperature to: w) decrease x) increase y) stay the same

Description : When you push down on the piston of a bicycle pump, the air is compressed into a smaller volume, which causes its temperature to: w) decrease x) increase y) stay the same

Last Answer : ANSWER: X -- INCREASE

The type of pump used for the recirculation of molten sodium coolant in liquid metal cooled reactor is a/an __________ pump. (A) Electromagnetic (B) Reciprocating (C) Centrifugal (D) Volute

Description : The type of pump used for the recirculation of molten sodium coolant in liquid metal cooled reactor is a/an __________ pump. (A) Electromagnetic (B) Reciprocating (C) Centrifugal (D) Volute

Last Answer : (A) Electromagnetic

For pumping slurry, one can use a __________ pump. (A) Reciprocating (B) Diaphragm (C) Centrifugal (D) Pneumatic

Description : For pumping slurry, one can use a __________ pump. (A) Reciprocating (B) Diaphragm (C) Centrifugal (D) Pneumatic

Last Answer : (B) Diaphragm

For a reciprocating pump, the indicator diagram is the graph between the (A) Discharge and overall efficiency (B) Volume swept by piston for one complete revolution and the pressure in the cylinder (C) Angle swept by the crank pin at any instant and the discharge (D) None of these

Description : For a reciprocating pump, the indicator diagram is the graph between the (A) Discharge and overall efficiency (B) Volume swept by piston for one complete revolution and the pressure in the cylinder (C) Angle swept by the crank pin at any instant and the discharge (D) None of these

Last Answer : (B) Volume swept by piston for one complete revolution and the pressure in the cylinder

Maintenance cost of a __________ pump for a particular duty is the least. (A) Centrifugal (B) Reciprocating (C) Volute (D) Gear

Description : Maintenance cost of a __________ pump for a particular duty is the least. (A) Centrifugal (B) Reciprocating (C) Volute (D) Gear

Last Answer : (A) Centrifugal

Molten soap mass is transported by a __________ pump. (A) Diaphragm (B) Reciprocating (C) Gear (D) Centrifugal

Description : Molten soap mass is transported by a __________ pump. (A) Diaphragm (B) Reciprocating (C) Gear (D) Centrifugal

Last Answer : (D) Centrifugal

A double acting reciprocating pump compared to a single acting pump (of almost same size working under same pressure levels) would give almost double (A) Head (B) Discharge (C) Efficiency (D) None of these

Description : A double acting reciprocating pump compared to a single acting pump (of almost same size working under same pressure levels) would give almost double (A) Head (B) Discharge (C) Efficiency (D) None of these

Last Answer : (B) Discharge

Reciprocating pumps are not able to compete with the centrifugal pump for industrial use, mainly because these pumps have (A) Very low speeds (B) Smaller discharge (C) Higher capital &maintenance cost (D) High vibrations

Description : Reciprocating pumps are not able to compete with the centrifugal pump for industrial use, mainly because these pumps have (A) Very low speeds (B) Smaller discharge (C) Higher capital &maintenance cost (D) High vibrations

Last Answer : (C) Higher capital &maintenance cost

For the transfer of solution of thick slurry, the pump used is a __________ pump(A) Reciprocating(B) Gear(C) Diaphragm(D) Centrifugal.

Description : For the transfer of solution of thick slurry, the pump used is a __________ pump. (A) Reciprocating (B) Gear (C) Diaphragm (D) Centrifugal

Last Answer : (C) Diaphragm

Pump used for the transportation of molten sodium in a fast breader reactor is a/an __________ pump. (A) Reciprocating (B) Plunger (C) Electromagnetic (D) Gear

Description : Pump used for the transportation of molten sodium in a fast breader reactor is a/an __________ pump. (A) Reciprocating (B) Plunger (C) Electromagnetic (D) Gear

Last Answer : (C) Electromagnetic

Acceleration head in a reciprocating pump (A) Increases the work done during delivery stroke (B) Decreases the work done during suction stroke (C) Does not change the work requirement of the pump (D) Increases the work done during suction stroke

Description : Acceleration head in a reciprocating pump (A) Increases the work done during delivery stroke (B) Decreases the work done during suction stroke (C) Does not change the work requirement of the pump (D) Increases the work done during suction stroke

Last Answer : (C) Does not change the work requirement of the pump

Priming is needed in a __________ pump. (A) Reciprocating (B) Gear (C) Centrifugal (D) Diaphragm

Description : Priming is needed in a __________ pump. (A) Reciprocating (B) Gear (C) Centrifugal (D) Diaphragm

Last Answer : (C) Centrifugal

Which of the following is used for pumping crude oil from oil well? (A) Single stage centrifugal pump (B) Gear pump (C) Screw pump (D) Duplex/triplex reciprocating pump

Description : Which of the following is used for pumping crude oil from oil well? (A) Single stage centrifugal pump (B) Gear pump (C) Screw pump (D) Duplex/triplex reciprocating pump

Last Answer : (D) Duplex/triplex reciprocating pump

To handle smaller quantity of fluid at higher discharge pressure, use a __________ pump. (A) Reciprocating (B) Centrifugal (C) Volute (D) Rotary vacuum

Description : To handle smaller quantity of fluid at higher discharge pressure, use a __________ pump. (A) Reciprocating (B) Centrifugal (C) Volute (D) Rotary vacuum

Last Answer : (A) Reciprocating

Which of the following is most prone to pulsating discharge flow? (A) Centrifugal pump(B) Reciprocating pump(C) Gear pump(D) Axial flow pump

Description : Which of the following is most prone to pulsating discharge flow? (A) Centrifugal pump (B) Reciprocating pump (C) Gear pump (D) Axial flow pump

Last Answer : (C) Gear pump

Slurries can be most conveniently pumped by a __________ pump. (A) Screw (B) Reciprocating (C) Gear (D) Centrifuga

Description : Slurries can be most conveniently pumped by a __________ pump. (A) Screw (B) Reciprocating (C) Gear (D) Centrifuga

Last Answer : (D) Centrifuga

What is the maximum theoretical suction lift (metres) of a reciprocating pump? (A) 5 (B) 10(C) 50 (D) 100

Description : What is the maximum theoretical suction lift (metres) of a reciprocating pump? (A) 5 (B) 10(C) 50 (D) 100

Last Answer : (B) 10

Purpose of relief valve in a reciprocating pump is to (A) Protect the pump against developing excessive pressure (B) Facilitate unidirectional flow of liquid (C) Reduce the discharge pressure (D) Control the rate of discharge

Description : Purpose of relief valve in a reciprocating pump is to (A) Protect the pump against developing excessive pressure (B) Facilitate unidirectional flow of liquid (C) Reduce the discharge pressure (D) Control the rate of discharge

Last Answer : (A) Protect the pump against developing excessive pressure

Which of the following is the most common pump for pumping either raw sewage or sludge? (A) Electromagnetic pump (B) Centrifugal pump (C) Reciprocating pump(D) Gear pump

Description : Which of the following is the most common pump for pumping either raw sewage or sludge? (A) Electromagnetic pump (B) Centrifugal pump (C) Reciprocating pump (D) Gear pump

Last Answer : (C) Reciprocating pump

The type of pump used for lifting large quantity of sewage is a __________ pump. (A) Gear (B) Centrifugal (C) Reciprocating (D) Plunger

Description : The type of pump used for lifting large quantity of sewage is a __________ pump. (A) Gear (B) Centrifugal (C) Reciprocating (D) Plunger

Last Answer : (B) Centrifugal

The __________ of a double acting reciprocating pump as compared to the single acting pump will be almost double. (A) Flow output (B) Head developed (C) Overall efficiency (D) Weight

Description : The __________ of a double acting reciprocating pump as compared to the single acting pump will be almost double. (A) Flow output (B) Head developed (C) Overall efficiency (D) Weight

Last Answer : Option A

A 10m^3 vessel initially contains 5 m^3 of liquid water and 5 m^3 of saturated water vapor at 100 kPa. Calculate the internal energy of the system using the steam table.  A. 5 x10^5 kJ  B. 8x10^5 kJ  C. 1 x10^6 kJ  D. 2 x10^6 kJ Formula: fromthe steamtable vƒ = 0.001043 m^3 / kg vg = 1.6940 m^3 / kg u ƒ= 417.3 kJ/kg ug= 2506kJ/kg formula: Mvap = V vap/vg M liq = Vliq/ vƒ u =uƒM liq + ug M vap

Description : A 10m^3 vessel initially contains 5 m^3 of liquid water and 5 m^3 of saturated water vapor at 100 kPa. Calculate the internal energy of the system using the steam table.  A. 5 x10^5 kJ  B. 8x10^5 kJ  C. 1 ... 3 kJ/kg ug= 2506kJ/kg formula: Mvap = V vap/vg M liq = Vliq/ vƒ u =uƒM liq + ug M vap

Last Answer : 2 x10^6 kJ

When a vessel containing a liquid is heated, the level of liquid initially falls and then rises up. Why does it happen so? OR Describe the irregular expansion of liquid.

Description : When a vessel containing a liquid is heated, the level of liquid initially falls and then rises up. Why does it happen so? OR Describe the irregular expansion of liquid.

Last Answer : On heating the liquid water from 0 degree C to 4 degree C, it contracts so the level of liquid initially falls. But after 4 degree C it expands so liquid rises up.

A node X on a 10 Mbps network is regulated by a token bucket. The token bucket is filled at a rate of 2 Mbps. Token bucket is initially filled with 16 megabits. The maximum duration taken by X to transmit at full rate of 10 Mbps is ............ secs. (1) 1 (2) 2 (3) 3 (4) 4

Description : A node X on a 10 Mbps network is regulated by a token bucket. The token bucket is filled at a rate of 2 Mbps. Token bucket is initially filled with 16 megabits. The maximum duration taken by X to transmit at full rate of 10 Mbps is ............ secs. (1) 1 (2) 2 (3) 3 (4) 4

Last Answer : (2) 2 

A container contains a mixture of two liquids P and Q in the ratio 7 : 5. When 9 litres of mixture are drawn off and the container is filled with Q, the ratio of P and Q becomes 7 : 9. How many litres of liquid P was contained in the container initially? a) 12 b) 21 c) 93 d)17 e) None

Description : A container contains a mixture of two liquids P and Q in the ratio 7 : 5. When 9 litres of mixture are drawn off and the container is filled with Q, the ratio of P and Q becomes 7 : 9. How many litres of liquid P was contained in the container initially? a) 12 b) 21 c) 93 d)17 e) None 

Last Answer : B Let initial quantity of P in the container be 7x and initial quantity of Q in the container be 5x Now 9 litres of mixture is drawn off from the container. Quantity of P in 9 litres of the mixture drawn off ... = 7 : 9 x=16* 21/4*28 Litres of P contained in the container initially =7x = 21

Most commonly used pump for lifting water in water supply mains, is (A) Axial flow pump (B) Reciprocating pump (C) Rotary type pump (D) Centrifugal pumps

Description : Most commonly used pump for lifting water in water supply mains, is  (A) Axial flow pump  (B) Reciprocating pump  (C) Rotary type pump  (D) Centrifugal pumps 

Last Answer : (A) Axial flow pump 

The depth of the water table at a place is 45 m below the general ground level. To lift water from a deep tube well in such a locality, the type of pump to be installed is (A) Centrifugal pump (B) Reciprocating pump (C) Deep well turbine pump (D) None of these

Description : The depth of the water table at a place is 45 m below the general ground level. To lift water from a  deep tube well in such a locality, the type of pump to be installed is  (A) Centrifugal pump  (B) Reciprocating pump  (C) Deep well turbine pump  (D) None of these 

Last Answer : (C) Deep well turbine pump

The non-clog pump which permits solid matter to pass out with the liquid sewage, is A. Centrifugal pump B. Reciprocating pump C. Pneumatic ejector D. None of these

Description : The non-clog pump which permits solid matter to pass out with the liquid sewage, is A. Centrifugal pump B. Reciprocating pump C. Pneumatic ejector D. None of these

Last Answer : ANS: A

The disintegrating pump in which solid matter is broken up before passing out, is A. Centrifugal pump B. Reciprocating pump C. Pneumatic ejector D. None of these

Description : The disintegrating pump in which solid matter is broken up before passing out, is A. Centrifugal pump B. Reciprocating pump C. Pneumatic ejector D. None of these

Last Answer : ANS: A

Which of the following pumps in used to pump sewage solids with liquid sewage without clogging the pump is? A. Centrifugal pump B. Pneumatic ejector C. Reciprocating pump D. None of these

Description : Which of the following pumps in used to pump sewage solids with liquid sewage without clogging the pump is? A. Centrifugal pump B. Pneumatic ejector C. Reciprocating pump D. None of these

Last Answer : ANS: A

Which Pump Is More Efficient Centrifugal Pump Or Reciprocating Pump?

Description : Which Pump Is More Efficient Centrifugal Pump Or Reciprocating Pump?

Last Answer : Centrifugal pump. Because flow rate is higher compared to reciprocating pump. Flow is smooth and it requires less space to install. Lower initial cost and lower maintenance cost.

A ____ pump consists of a reciprocating or rotating cavity between two lobes or gears and a rotor. a. positive c. negative b. centrifugal d. hand

Description : A ____ pump consists of a reciprocating or rotating cavity between two lobes or gears and a rotor. a. positive c. negative b. centrifugal d. hand

Last Answer : a. positive

Draw indicator diagram for reciprocating pump showing the effect of accelerating head and frictional head.

Description : Draw indicator diagram for reciprocating pump showing the effect of accelerating head and frictional head.

Last Answer : Draw indicator diagram for reciprocating pump showing the effect of accelerating head and frictional head.