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Question		Answer
The air discharge vessel of the piston pump is used for: start learning		Compensating the fluctuation of pressure and the capacity
The eductor has: start learning		No moving parts
The diffuser is necessary in: start learning		The ejector pump
The swing pump has: start learning		The semirotary motion of working device
The impeller pump should have at least: start learning		One shaft gland
The ability of suction without priming has: start learning		The circulating pump...
The elastic casing insert has: start learning		Single rotor screw pump
The swing pump should have at least: start learning		Four valves
The multipiston pump with rotating cylinders rotates in: start learning		One direction
The elastic casing insert has: start learning		Single rotor screw pump
The plunger pump is: start learning		Single action
The plunger pump has: start learning		The plunger stuffing box
The positive displacement rotary pumps are used for pumping: start learning		Liquids having lubricating properties
Which pump can be used as vacuum pump: start learning		The circulating pump with rotating liquid ring
The non-return valve is usually fitted on the discharge pipe of: start learning		Impeller pump
The safety valve is not necessary for: start learning		Swig pump
The direction of the liquid flow changes by 90o in the impeller of: start learning		Centrifugal pump
Ability of suction without priming is the feature of: start learning		Screw pump
The impeller is placed eccentrically inside the casing of: start learning		The circulating pump with rotating liquid ring
The variable displacement pump has: start learning		More than two pistons

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