In a centrifugal pump the liquid enters the pump A. The most common type of casing is called a volute and it looks similar to a snail shell. At the top B. Is used to cast symmetrical objects C. Is used to obtain high density and pure casting Greater than the vapour pressure of the liquid at that temperature C. Equal to the vapour pressure D. Equal to the developed head 250+ TOP MCQs on Centrifugal Pump and Answers. 250+ TOP MCQs on Pumps and Answers Dairy Engineering Multiple Choice Questions on "Pumps". Discharge of a centrifugal pump is proportional to A. Impeller diameter (D) B. They are applied when higher pumping pressures are required for conveying pure or slightly contaminated liquids. a) Newtons first law. Clarification: The impeller in the volute pump is surrounded by a spiral shaped casing called as volute chamber. Working Mechanism of a Centrifugal Pump A centrifugal pump is one of the simplest pieces of equipment in any process plant. Liquid enters the pump suction nozzle. Home / Chemical Engineering / Fluid Mechanics / Question Examveda A centrifugal pump designed for handling water ( = 1 cp) will deliver __________ when pumping a thicker oil ( = 30 cp). Study with Quizlet and memorize flashcards containing terms like (4-074-1.1) Wear rings in centrifugal pumps: Are non-replaceable. Enquire. Directly proportional to diameter of its impeller B. Inversely proportional to diameter of its impeller C. Directly proportional to (diameter) 2 of its impeller d) Steam engine pump. 5. maintenance, and troubleshooting of centrifugal pumps. Centrifugal pumps are the most economical and most common pumps used for pumping water in industrial applications. Reciprocating pump. Less than the vapour pressure of the liquid at that temperature B. 4.1.1 Centrifugal Pumps. It enters inside the rotating impeller vane through the eye. Centrifugal pumps are used to transport ________. b) High lift pump. In a centrifugal pump, the regulating valve is provided on the A Casing B Delivery pipe C Suction pipe D Impeller Q2. 15. The centrifugal action of the impeller accelerates the liquid to a high velocity, transferring mechanical (rotational) energy to the liquid. In addition, these pumps are often used to create a vacuum environment within a ship's hull during construction or repairs. Q1. 9. 10. In this case, the bearing can belong to the wet end. KNOWLEDGE: K1.01 [3.3/3.5] QID: P21 . Centrifugal pump requires more floor space and heavy foundation. A Centrifugal pump is a rotary machine that converts mechanical energy or kinetic energy into pressure energy or pressure head by means of centrifugal force, is known as a centrifugal pump. Q13.The basic function of the centrifugal pump impeller is to A. directly increase the pressure of the liquid being pumped B. directly increase the velocity of the liquid being pumped C. convert the potential energy of the liquid to kinetic energy D. separate air from the liquid being pumped View Answer There are two basic types of pump cavitation: Suction Cavitation Centrifugal pumps are used to discharge large quantity of water Statement (ii) alone is correct Both the statement are wrong Statement (i) alone is correct Both the statements are correct Answer 20. 1. The wet end parts of the pump include those that provide the hydraulic performance of the pump: the impeller and the casing. a) Density of the fluid b) Speed of the blower Turbines and compressors work with the gas, while centrifugal pump transfers energy. a) Axial flow b) Radial flow c) Mixed flow d) All centrifugal pumps have same specific speed Answer: a mcq on centrifugal pump, centrifugal pump mcq questions, hydraulic machines mcq in hindiRAC MCQ-https://youtube.com/playlist?list=PLbkIghvjQ7P_cHno9NE3eJ3uNQ. Centrifugal pump engineers are familiar with selecting pumps from a performance range using performance curves that map the operating range. 5 years ago multistage centrifugal pumps are used A. to produce high head B. to give static discharge C. To pump viscous liquids D. Both A and B Answer: Option A Which of the following is not a primary function of a Bank? What is supercharging Mcq? Enquire. Turbomachines work under ________. Which type of vanes is suitable for high speed runners? It delivered 1.2 m 3 /minute against a head of 25m. c) Air lift pump. Sometimes the first radial bearing can be water-filled. The centrifugal pump casing is the component of the pump that converts all of the velocity created by the rotating impeller into a controlled and stable flow and directs it out of the pump through the discharge point. The impeller in the volute pump is surrounded by _____________. 3. Standard centrifugal pumps based on ISO733 (DIN24255) Enquire. 2. Low flow rate with high discharge pressure. Home / Chemical Engineering / Fluid Mechanics / Question Examveda Cavitation occurs in a centrifugal pump when the suction pressure is A. A centrifugal pump uses a centrifugal force to pump the fluids. Solution(By Examveda Team) . A Centrifugal pump is a mechanical machine that pumps the fluids by converting the mechanical power (rotational energy) into the pressure energy of the fluid flow. At the top Which one of the following contains indications of cavitation in an operating centrifugal pump? Which of the following centrifugal pumps has higher specific speed than the others? So the liquid entering the pump receives kinetic energy from the rotating impeller. High head C. Pumping of viscous fluids D. High head and high discharge Answer: Option B The main parts of centrifugal pumps can be divided into the wet end and the mechanical end. There are three main types of supercharger; Roots-type, centrifugal, and twin screw. Discharge of a centrifugal pump is Home / Mechanical Engineering / Hydraulics And Fluid Mechanics In ME / Question Examveda Discharge of a centrifugal pump is A. In simple understanding, A pump is required to transfer liquid from an area or a place to another place. 8. Bearings constrain the relative motion of the shaft (rotor) and reduce friction between the rotating shaft and the stator. for Mechanical Engineering 2022 is part of Mechanical Engineering preparation. Centrifugal Pumps - An introduction to Centrifugal Pumps. Image 1. A. D. High motor amps with high discharge pressure. There are at least 5 common types of bearing, each of which operates on different principles: This pressure increase can be anywhere from several dozen to several hundred psid across a centrifugal pump with a single stage impeller. They are - steam engine, diesel engine and electrically driven pump. Answer: a. Clarification: Centrifugal pump is a turbomachinery. Why is multi-stage compression used? A variable-speed centrifugal fire water pump is taking a suction on an open storage tank and discharging through a 4-inch diameter fire hose and through a nozzle located 50 feet above the pump. Casting objective questions (mcq) and answers - MechanicalTutorial Casting - Casting objective questions and answers 1. Normally, a centrifugal pump produces a relatively low pressure increase in the fluid. Bearings. Low flow rate with low discharge pressure. 5. Because of fewer parts centrifugal pump have less cost than reciprocating pump. The work done by centrifugal pump on water per second per unit weight of water is given by; The manometric head Hm of a centrifugal pump is given by; The manometric efficiency (man) of a centrifugal pump is given by; Mechanical efficiency (mech) of a centrifugal . Centrifugal pumps are provided with packing rings or mechanical seal, which helps prevent the leakage of the pumped liquid. With the centrifugal pump operating at constant speed, when the head decreases the flow rate increases. a. pressure energy b. kinetic energy The operation of a centrifugal pump is based on a rotating impeller . The efficiency of a pump is generally less than that of a turbine. Therefore, it is known as a centrifugal pump. A booster pump is based on _____________. Clarification: Centrifugal blowers they rotate at a speed up to 15000 rpm. A Forward facing vanes B Radial vanes C Backward facing vanes D None of the above Q3. Pump curves are plotted with head pressure as the ordinate (Y Axis) and the flow rate as th. b) Newtons second law. The main acting force is centrifugal force 11. Major places where cavitation occurs are in pumps, on impellers or propellers. 7. Answer (1 of 6): Actually, you have stated the question backwards. Related Topics . Turbomachines are machines that transfer energy between a rotor and a fluid, including both turbines and compressors. Is used to ensure purity and density at extremities of a casting B. Whereas positive displacement blowers, they rotate at a speed of around <3600 rpm. Centrifugal pumps are used for bilge pumping, fire fighting, water supply, and fuel transfer tasks. Answer: d. Clarification: There are 3 types of pumps on the basis of type of power. Environmental Engineering Multiple Choice Questions on "Centrifugal Pump". Clarification: Centrifugal pump action is characterized by the pump performance curve upper curve of the graph on the right. All work in a slightly different way, but ultimately they all do the same thing . A. Process centrifugal pumps - single stage, based on ISO 5199, ISO 2858. The centrifugal pump claims to have following advantages over positive displacement also called reciprocating pump. Centrifugal pumps can also be used to transfer sewage and other waste materials from one location to another. A centrifugal pump has an impeller of 30cm diameter and runs at 1000 rpm giving best efficiency. CENTRIFUGAL PUMPS. The characteristic curves of a centrifugal pump, plots required by the pump. Centrifugal pump has more weight due to a given discharge. a. Axial flow b. Also because of fewer parts installation and maintenance are easier and cheaper as compared to reciprocating pump. At the bottom C. At the canter D. From sides Answer: Option C Click here to read 1000+ Related Questions on Hydraulics and Fluid Mechanics in ME (Mechanical Engineering) A flow in which the quantity of liquid flowing per second is constant, is called __________ flow. The pump preferred to be used for pumping highly viscous fluids belongs to the category ofa)screw pumpb)turbine pumpc)plunger pumpd)centrifugal pumpCorrect answer is option 'C'. The term PSID (Pounds Force Per Square Inch Differential) is equivalent to P. Examveda In a centrifugal pump, the liquid enters the pump A. Why is multistage compression used Mcq? Centrifugal pumps. Generally a globe valve C. Provided to prevent liquid from backing up through the pump when the pump is turned off or accidently stops running D. All of the above Answer: Option D Centrifugal Pump MCQ Question 1 Detailed Solution Concept: The specific speed of a centrifugal pump is defined as the speed of a geometrically similar pump that would deliver one cubic meter of liquid per second against a head of one meter. c) Newtons third law. Multistage centrifugal pumps are used within water technology, energy technology, industrial cleaning technology and in cooling technology as well as in the field of liquefied gas applications. Centrifugal pump objective questions (mcq) and answers - MechanicalTutorial Centrifugal Pump objective questions and answers 11. Whereas reciprocating pumps are suitable for less discharge with a high head. The most common pump used for hydraulic fluid power application is _____ Any comments or queries are most welcome. Granting Loans B. Dimensionless pressure rise is not dependent on which of the following? Multistage centrifugal pumps are used to obtain Multistage centrifugal pumps are used to obtain Home / Mechanical Engineering / Hydraulics And Fluid Mechanics In ME / Question Examveda Multistage centrifugal pumps are used to obtain A. Search result of "Centrifugal pumps examveda" Search By Products. Examveda Discharge (Q) of a centrifugal pump is given by (where D = Diameter of impeller at inlet, b = Width of impeller at inlet, and Vf = Velocity of flow at inlet) A. Q = .D.Vf B. Q = .b.Vf C. Q = .D.bf.V D. Q = D.b.Vf Answer: Option C A flow in which the quantity of liquid flowing per second is constant, is called __________ flow. Rewriting it is the actual answer. While the reciprocating pump has less weight of pump for a given discharge. Provided in the discharge line B. Enquire. Which one of the following will cause the pump to operate at shutoff head? More head C. More capacity D. Less head & more capacity Answer: Option A High discharge B. The article has been written keeping in mind the level and interests of students and the beginners in operation. - Impeller gets its energy from the driver (Motor, Engine, or Turbine) The rotating impeller forces liquid outward by centrifugal force. ; Condensate Pumping - High temperatures and danger of impeller cavitation is the major challenge for condensate pumping in steam systems. Pumps -1- TOPIC: 191004 . a) To improve C.O.P. The pump is a fixed volume machine. D 2 C. D 3 D. 1/D 3 E. 1/D 2 View Answer Your Comments 12. It is a mechanical device. Steady . Also, these are belt driven to facilitate changes in the speed. Can you explain this answer? a) Low lift pump. Radial flow c. Mixed flow d. All have same specific speed Answer Explanation 2) Pump transfers the mechanical energy of a motor or of an engine into _________ of a fluid. A. Semi-centrifugal casting A. The centrifugal pump uses the centrifugal force to push out the fluid. ; Related Documents . 1. 2. Their components are rotating components, an impeller coupled to a shaft, and stationary components, casing, casing cover, and bearings. The maximum pressure that could be achieved is usually sufficiently low such that a pressure relief valve is not required. Explanation: By expanding the refrigerant very close to the saturated liquid state refrigeration effect can be improved.And if the refrigerant is compressed very near to the saturated vapour line by using compression in more stages, overall work can be reduced. The inlet passage of water entry is controlled by ________. 1. Check in a centrifugal pump is Home / Chemical Engineering / Fluid Mechanics / Question Examveda Check in a centrifugal pump is A. Collecting Cheques/Drafts customers C. Facilitating import of goods D. 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