A centrifugal pump can’t supply water after startingYou should check ().
相似题目
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The pumps employed on board ship can be divided into two main categories ie() pumps and centrifugal pumps.
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The purpose of the wearing rings used in a centrifugal pump is to ().
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The discharge rate or capacity of a centrifugal pump will vary directly as the ().
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Which of the following actions should be taken if during a routine maintenance inspection of a centrifugal pump, localized scoring on a pump shaft sleeve is detected?()
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The usual symptoms of cavitation in a centrifugal pump is ().
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Pitting in the suction areas of a centrifugal pump bronze impeller is usually caused by ().
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A multistage centrifugal pump can be BEST described as having ().
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A double suction centrifugal pump impeller has been installed in the reverse direction, and will ().
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What is a function of the wearing rings used in most centrifugal pumps?()
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Which features of a centrifugal pump reduce the need for renewing worn impellers and pump casings?()
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Which of the following pumps are self-priming, and can deal with liquid from a level below the pump? () (1) reciprocating (2) rotary (3) centrifugal
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The function of a centrifugal pump double volute casing is to ().
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When installed for bilge pumping or ballast duty, centrifugal pumps require a () to remove air from the suction pipe.
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The reciprocating pump can’t draw water from a tank may be caused by ().
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What is a characteristic of all centrifugal cargo pumps? ()
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When starting a centrifugal pump, the discharge valve should be ().
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The volute of centrifugal pump also acts as a diffuser converting ()into pressure head.
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On modern ships, centrifugal pump with a self-primer has replaced reciprocating pump as bilge pump because()
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A centrifugal bilge pump requires priming ().
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The amount of fluid delivered by a centrifugal pump can be regulated by ().
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Centrifugal pumps have what advantage(s) over reciprocating pumps?().
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Which of the following pumps are self-priming, and can deal with liquid from a level below the pump() (1) ejector (2) screw (3) centrifugal
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To operate a centrifugal fire pump at reduced capacity, you should ().
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If you were operating a centrifugal water service pump with worn wearing rings, the ().
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