A sight glass is installed in the liquid line to indicate the condition of the refrigerant charge and may also indicate the （）.

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• A liquid indicator sight glass is useful in determining whether or not a refrigeration system is sufficiently chargedIt is generally located in the（）.

  A . high pressure liquid line B . low pressure liquid line C . high pressure vapor line D . low pressure vapor line

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• A vessel is “in sight” of another vessel when（）.

  A . she can be observed by radar B . she can be observed visually from the other vessel C . she can be plotted on radar well enough to determine her heading D . her fog signal can be heard

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• Some refrigeration systems have chemical moisture indicators installed in conjunction with the sight glass in the liquid lineIf excess moisture is present in the system, the indicator will （）

  A . activate the driers B . change color C . secure the compressor D . add a predetermined amount of liquid drier

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• A relief valve for a cargo pump is generally installed（）.

  A . after the discharge valve B . between the pump and discharge valve C . after the suction valve D . between the pump and suction valve

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• A vessel is proceeding downstream in a narrow channel on the Western Rivers when another vessel is sighted moving upstream. Which vessel has the right of way? （）

  A . The vessel moving upstream against the current B . The vessel moving downstream with a following current C . The vessel located more towards the channel centerline D . The vessel with the least amount of maneuverability

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• What is a consequence of installing a Cisco End-to-End Solution?（）

  A . Different Support Contracts with multiple vendors B . Difficulty implementing network services C . Solid investment protection D . Poor Investment Protectio

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• When a boiler is operating, the water level in the gauge glass reads （） when the boiler is shut down.

  A . lower than B . higher than C . as much as D . the same a

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• A liquid sight flow indicator in a refrigeration system is examined and gas bubbles are noted in motion with the fluid flowThis means （）.

  A . the system is fully charged B . there is air leaking in from the condenser C . ice crystals are forming in the refrigerant D . the system contains less than a full charge of refrigerant

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• A star is observed at lower transit. The line of position derived from this sight is（）.

  A . on the prime vertical B . a latitude line C . a longitude line D . of no special significance

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• Which of the problems listed could be indicated if a sight glass in the refrigerant liquid line is full of bubbles?（）

  A . Proper refrigerant charge B . Faulty expansion valve C . Insufficient refrigerant D . Solenoid valve stuck ope

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• In an operating refrigeration system low on refrigerant, a liquid line sight glass will（）

  A . be clear B . be blue C . be light green D . show bubble

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• If a liquid sight flow indicator in a refrigeration system shows gas bubbles in motion passing inside of the glass, there is （）.

  A . too much refrigerant in the system B . oil entrained in the refrigerant C . less than a full charge of refrigerant in the system D . ice crystals forming in the refrigerant

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• A line of position formed by sighting two charted objects in line is called a(n)（）.

  A . relative bearing B . range line C . track line D . estimated positio

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• As for an oil-fired boiler if at a normal steaming condition and water goes out of sight in gauge glasses the action you should take is: （） (1) secure oil to fires (2) increase feed pump pressure

  A . （1） B . （1）and（2） C . （2） D . neither（1）nor（2）

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• Whena pencil is partly in a glass of water, it looks as if it____

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• When a pencil is partly in a glass of water, it looks as if it ( ).

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• There is an old saying goes: “a full cup of tea is offensive to the guests, while a full glass of wine shows to them.”

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• Which indicates a man who is short-sighted in the following idioms?

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• This is a room in Joan's house. There is a bed, a table and some chairs in it. There's a glass and some books on the table. Joan is in the room. Her father and mother are at the school. They all work hard.

  What's on the table？ A．A glass. B．Some books. C．A glass and some books.

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• As for an oil-fired boiler if at a normal steaming condition and water goes out of sight in gauge glasses the action you should take is: (1) secure oil to fires; (2) increase feed pump pressure.

  A.(1) B.(1) and (2) C.(2) D.neither (1) nor (2)

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• How can a seller receive immediate payment if the draft is made at 30 days after sight？ He can

  A．send the draft to the correspondent bank for immediate payment B．present it to the bank against which it is drawn for payment C．ask the buyer to pay the money D．discount the draft at his bank and get money immediately

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• Short sight can be __________ by the use of suitable glasses. A．fixed B. improved C. reduced D. corrected

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• She was short-sighted.She has to wear____glasses.

  A．a pair of B．a couple of C．a D．two

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• Her boy friend is a tall young man _____ glasses. He likes to ______ a face.

  A．wear; make B．wears; makes C．with; make D．wearing; making

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