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
Description : A mono pump is a __________ pump. (A) Centrifugal (B) Piston (C) Positive acting rotary (D) A group of vacuum
Last Answer : (C) Positive acting rotary
Description : Pick out the wrong statement: (A) The capacity of an evaporator is reduced by the boiling point elevation (B) Corrosive liquid is normally passed through the tubes in a ... recompression evaporator (D) Heat sensitive materials should be concentrated in high pressure evaporators
Last Answer : (D) Heat sensitive materials should be concentrated in high pressure evaporators
Description : The separation of liquid droplets from the vapor is done by a/an __________, in the evaporators. (A) Steam ejector (B) Entrainment separator (C) Compressor (D) Vacuum pump
Last Answer : (B) Entrainment separator
Description : Medium viscosity lubricating oil can be most ideally pumped by a __________ pump. (A) Vane (B) Piston (C) Centrifugal (D) Plunger
Last Answer : (A) Vane
Description : __________ pump is the most suitable device for discharging a liquid against a pressure of ≥ 1500 kgf/cm2 . (A) Centrifugal (B) Piston (C) Plunger (D) Vane
Last Answer : (C) Plunger
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
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
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
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
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
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
Description : Which of the following vacuum pumps operates by using a very cold surface to trap the gases on the cold surface? Is it a: w) sublimation pump x) turbo pump y) cryopump z) diffusion pump.
Last Answer : ANSWER: Y -- CRYOPUMP
Description : A centrifugal pump is called a turbine pump, if it is having a (A) Turbine type impeller (B) Vaned diffusion casing (C) Rotating vaned volute (D) None of these
Last Answer : (B) Vaned diffusion casing
Description : Centrifugal pump is normally classified on the basis of the (A) rpm (B) Type of casing (C) Impeller blade angle (D) Number of blades in impeller
Last Answer : (B) Type of casing
Description : The steam ejector is used to (A) Remove condensate from the steam pipelines (B) Create vacuum (C) Superheat the steam (D) None of these
Last Answer : (B) Create vacuum
Description : Working of a __________ pump characterises mixed flow. (A) Turbine (B) Piston (C) Diaphragm (D) None of these
Last Answer : (A) Turbine
Description : Pumping of a corrosive liquid is generally preferred to be done by a __________ pump, as it can be made of a variety of materials including plastics. (A) Piston (B) Gear (C) Positive displacement (D) Sump
Last Answer : (B) Gear
Description : Which of the following options will facilitate the achievement of a very high head (say 30 metres) in case of a centrifugal pump? (A) Increasing the impeller speed and the volute area (B) Increasing the number of vanes ... or more impellers in series on a single shaft (D) Either of (A), (B) or (C)
Last Answer : (C) Mounting of two or more impellers in series on a single shaft
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
Description : High specific speed of a pump implies that, it is a/an __________ pump. (A) Centrifugal (B) Mixed flow (C) Axial flow (D) None of these
Last Answer : (C) Axial flow
Description : Operating principle of cyclone separator is based on the action of __________ dust particles. (A) Diffusion of (B) Centrifugal force on (C) Gravitational force on (D) Electrostatic force on
Last Answer : (B) Centrifugal force on
Description : To remove very small amount of tiny solid impurities from liquid, we use a (A) Pressure filter (B) Vacuum filter (C) Centrifugal filter (D) Coagulant
Last Answer : (D) Coagulant
Description : The domestic refrigerator uses following type of compressor (a) centrifugal (b) axial (c) miniature sealed unit (d) piston type reciprocating
Last Answer : Ans: d
Description : For separation of sugar solution from settled out mud, we use a __________ filter. (A) Sparkler (B) Plate and frame (C) Centrifugal (D) Rotary drum vacuum
Last Answer : (C) Centrifugal
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
Description : Crude oil is pumped by a __________ pump. (A) Gear (B) Centrifugal
Last Answer : (B) Centrifugal
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
Description : For pumping slurry, one can use a __________ pump. (A) Reciprocating (B) Diaphragm (C) Centrifugal (D) Pneumatic
Last Answer : (B) Diaphragm
Description : Liquid delivery by centrifugal pump starts, only when the head developed by it is equal to the __________ head. (A) Manometric (B) Total (C) Static (D) Friction
Last Answer : (A) Manometric
Description : Specific speed of a centrifugal pump depends upon the __________ head. (A) Suction (B) Delivery (C) Manometric (D) None of these
Last Answer : (D) None of these
Description : Boiler feed water pump is usually a __________ pump. (A) Reciprocating (B) Gear (C) Multistage centrifugal (D) Diaphragm
Last Answer : (C) Multistage centrifugal
Description : A hydraulic ram acts as a/an __________ pump. (A) Centrifugal (B) Reciprocating (C) Impulse (D) Parallel cylinder
Last Answer : (C) Impulse
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)
Description : Draining of shallow pits or sump is done by a sump pump, which is a __________ pump. (A) Single stage vertical (B) Centrifugal (C) Plunger (D) Diffuser
Last Answer : (A) Single stage vertical
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
Description : Theoretical head developed by a centrifugal pump does not depend upon the __________ the impeller. (A) Radius of (B) Speed of (C) Fluid velocity leaving (D) None of these
Description : Molten soap mass is transported by a __________ pump. (A) Diaphragm (B) Reciprocating (C) Gear (D) Centrifugal
Last Answer : (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
Description : In case of a centrifugal pump, the ratio of total delivered pressure to pressure developed with the impeller is called the __________ efficiency. (A) Manometric (B) Mechanical (C) Volumetric (D) Overall
Description : Maximum theoretical suction lift for water at 15°C by a centrifugal pump is 34 ft. The same for water at 90°C will be __________ ft. (A) 40 (B) 34 (C) 8 (D) 37
Last Answer : (C) 8
Description : In case of a __________ the energy of flow is considerably decreased downstream of the machine. (A) Blower (B) Turbine (C) Centrifugal pump (D) Centrifugal fan
Last Answer : (B) Turbine
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)
Description : Higher specific speed (200-500) of a centrifugal pump indicates that the pump is of __________ flow type. (A) Axial (B) Radial (C) Mixed (D) None of these
Last Answer : (A) Axial
Description : Priming is needed in a __________ pump. (A) Reciprocating (B) Gear (C) Centrifugal (D) Diaphragm
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)
Description : A centrifugal pump has the following specifications: Power = 4 H.P.; Speed = 800 rpm Head = 8 metres Flow = 1000 litres/minutes. If its speed is halved, the power consumed now will be __________ hp. (A) 0.5 (B) 2 (C) 4 (D) 1
Last Answer : (A) 0.5
Description : The peripheral velocity at inlet of a centrifugal pump having inlet diameter of 25 cms and rotating at 950 rpm is __________ m/sec. (A) 1.8 (B) 12.4 (C) 186.2 (D) 736.4
Last Answer : (B) 12.4
Description : A centrifugal pump has the following specifications: Power = 4 H.P.; Speed = 800 rpm Head = 8 metres Flow = 1000 litres/minutes. If its speed is halved, then the new head will be __________ metres. (A) 2 (B) 4 (C) 8 (D) 5.5
Last Answer : (A) 2
Description : A centrifugal pump has the following specifications: Power = 4 H.P.; Speed = 800 rpm Head = 8 metres Flow = 1000 litres/minutes. If its speed is halved, the new discharge will be __________ litres/minute. (A) 500 (B) 200 (C) 1000 (D) 750
Last Answer : (A) 500