When retrieving the survival craft，the winch operator should stop the winch and check（）...

第1题

[单选题] The database administrator of your company created a public synonym called HR for the HUMAN_RESOURCES table of the GENERAL schema, because many users frequently use this table. As a user of the database, you created a table called HR in your schema. What happens when you execute this query?（）

A、You obtain the results retrieved from the public synonym HR created by the database administrator. B、You obtain the results retrieved from the HR table that belongs to your schema. C、You get an error message because you cannot retrieve from a table that has the same name as a public synonym. D、You obtain the results retrieved from both the public synonym HR and the HR table that belongs to your schema, as a Cartesian product. E、You obtain the results retrieved from both the public synonym HR and the HR table that belongs to your schema, as a FULL JOIN.

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第2题

[单选题] The database administrator of your company created a public synonym called HR for the HUMAN_RESOURCES table of the GENERAL schema, because many users frequently use this table. As a user of the database, you created a table called HR in your schema. What happens when you execute this query? SELECT * FROM HR; （）

A、You obtain the results retrieved from the public synonym HR created by the database administrator. B、You obtain the results retrieved from the HR table that belongs to your schema. C、You get an error message because you cannot retrieve from a table that has the same name as a public synonym. D、You obtain the results retrieved from both the public synonym HR and the HR table that belongs to your schema, as a Cartesian product. E、You obtain the results retrieved from both the public synonym HR and the HR table that belongs to your schema, as a FULL JOIN.

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第3题

[] The database administrator of your company created a public synonym called HR for the HUMAN_RESOURCES table of the GENERAL schema, because many users frequently use this table. As a user of the database, you created a table called HR in your schema. What happens when you execute this query? SELECT * FROM HR;（） The database administrator of your company created a public synonym called HR for the HUMAN_RESOURCES table of the GENERAL schema, because many users frequently use this table. As a user of the database, you created a table called HR in your schema. What happens when you execute this query? SELECT * FROM HR;（）

A、A. You obtain the results retrieved from the public synonym HR created by the database administrator. B、B. You obtain the results retrieved from the HR table that belongs to your schema. C、C. You get an error message because you cannot retrieve from a table that has the same name as a public synonym. D、D. You obtain the results retrieved from both the public synonym HR and the HR table that belongs to your schema, as a Cartesian product. E、E. You obtain the results retrieved from both the public synonym HR and the HR table that belongs to your schema, as a FULL JOIN.

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第4题

[单选题] What happens to the pulling power of a winch when retrieving wire rope?（）

A、It increases B、It decreases C、It remains the same D、It fluctuates，depending on the gearing system

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第5题

[单选题] EXHIBIT, Emp Table Exhibit A Exhibit B Examine the data from the EMP table. Evaluate this SQL statement: SELECT * FROM emp WHERE emp _ id = 3); WHERE commission = (SELECT commission FROM emp What is the result when the query is executed?（）

A、Exhibit A B、Exhibit B C、The query returns no rows D、The query fails because the outer query is retrieving more than one column E、The query fails because both the inner and outer queries are retrieving data from the same table.

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第6题

[单选题] The biggest problem encountered when towing bridle legs are too short is（）.

A、retrieval B、adjusting tension C、excessive strain D、hookup to main towline

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第7题

[单选题] If the towline parts，you should（）.

A、start towing by pushing ahead B、abandon the towing vessel C、retrieve the tow bridle D、relieve strain on the retrieving line

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第8题

[单选题] A technician is trying to retrieve a screw that fell inside a case and is just out of reach. Which of the following is the BEST procedure to retrieve the screw?（）

A、Turn the case upside down, shake gently and let the screw fall out. B、Use a shop vacuum to retrieve the screw. C、Use the hardware abstraction layer (HAL). D、Use an extension magnet.

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第9题

[单选题] The clutch band of a constant tensioning mooring winch must be set up tight enough to drive the winch drum and should slip only when （）.

A、excessive loads are placed on the winch B、minimum pull is being exerted by the winch C、automatic operation of the winch is desired D、wire is being retrieved at the maximum rate

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When retrieving the survival craft，the winch operator should stop the winch and check（）.

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