Strainers are commonly used in hydraulic systems to （）.

A、protect the pump from fine soluble contaminants

B、prevent solid particles from entering the pump

C、prevent solid particles from entering the filter

D、protect the directional control valves

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更多“Strainers are commonly used in hydraulic systems to （）.”相关的问题

第1题

[] Lubricating oil systems are fitted with a wide variety of strainers some of which can be cleaned in site while others have replaceable cartridgesThe bold and italic word “which” means （）.

A、A.lubricating oil B、B.lubricating oil systems C、C.strainers D、D.cartridges

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第2题

[单选题] In the fire main system, quick cleaning strainers are located at the（）.

A、pump suctions B、pump discharge C、fire hydrants D、hose nozzle

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第3题

[单选题] Strainers, sometimes called （）, are devices designed to prevent the passage of unwanted solids into or further along a system.

A、dampers B、filters C、stopper circuits D、separators

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第4题

[填空题] Chomsky refers to the child’s innate endowment as（）,a set of principles which are common to all languages.

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第5题

[] Which three statements are true about the working of system privileges in a multitenant control database(CDB) that has pluggable databases (PDBs)?（）

A、A. System privileges apply only to the PDB in which they are used. B、B. Local users cannot use local system privileges on the schema of a common user. C、C. The granter of system privileges must possess the set container privilege. D、D. Common users connected to a PDB can exercise privileges across other PDBs. E、E. System privileges with the with grant option container all clause must be granted to a common user before the common user can grant privileges to other users.

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第6题

[单选题] （）are not included in the common tools.

A、Screwdrivers B、Derricks C、Chipping hammers D、Saws

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第7题

[单选题] （） are commonly used in mechanical-hydraulic governor（调速器） to sense engine speeds.

A、Bulbs B、Bulks C、Flyweights D、Flywheels

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第8题

[单选题] In many installations basket strainers consist of a cylindrical container in which a perforated metal or wire basket is suspendedThe bold and italic word “which” means （）.

A、installations B、basket strainers C、a cylindrical container D、a metal or wire basket