搜题

【单选题】

The bottom of the mast rests on a part of the keel called the mast（）.

A、foot

B、heel

C、step

D、sole

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更多“The bottom of the mast rests on a part of the keel called the mast（）.”相关的问题

第1题

[单选题] The clearance volume for a single stage compressor is defined as the space created between the （）.

A、top of the piston and bottom side of head, with the piston at BDC B、piston and head, including the space around the piston to the top of the upper ring and under the valves, with the piston at TDC C、bottom of the piston and bottom side of the head at TDC, regardless of upper ring location and valve placement D、top of the piston and bottom side of the head at TDC as compared to that which exists between the top of the piston and bottom side of head at BDC

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第2题

[单选题] For Vee-form engines, （） is shaped to given two slopping surface on which （） are placed at the correct relative angle to each other.

A、the bottom of the column；the cylinder blocks B、the top of the column；the cylinder heads C、the top of the column；the cylinder blocks D、the bottom of the column；the cylinder heads

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第3题

[单选题] When measuring the oxygen content of the cargo tanks prior to loading cargoes requiring vapor recovery，check it（）.

A、one meter from the tank bottom and one meter below the tank top B、one half the ullage of the tank and one meter below the tank top C、one half the ullage of the tank and one meter above the tank bottom D、at three meter intervals from the tank top to the bottom

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第4题

[单选题] The holding power of an anchor increases when the（）.

A、amount of chain lying along the bottom increases B、length of the catenary is reduced C、mooring line tension is increased D、amount of chain lying along the bottom decreases

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第5题

[单选题] The holding power of an anchor at a given scope of cable increases when the（）.

A、amount of chain lying along the bottom increases B、length of the catenary is reduced C、mooring line tension is increased D、amount of chain lying along the bottom decreases

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第6题

[] A Doppler log in the bottom return mode indicates the（）.

A、A.velocity of the current B、B.bottom characteristics C、C.depth of the water D、D.speed over the ground

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第7题

[] A Doppler log in the bottom return mode indicates the（）.

A、A.velocity of the current B、B.bottom characteristics C、C.depth of the water D、D.speed over the ground

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第8题

[单选题] Charted depth is the（）.

A、vertical distance from the tidal datum to the ocean bottom plus the height of the tide B、vertical distance from the tidal datum to the ocean bottom C、average height of water over a specified period of time D、average height of all low waters at a place

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第9题

[单选题] The inner bottom is the（）.

A、tank top B、compartment between the tank top and shell of the vessel C、inner side of the vessel's shell D、space between two transverse bottom frames

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第10题

[单选题] The inner bottom is the（）.

A、tank top B、compartment between the tank top and shell of the vessel C、inner side of the vessel's shell D、space between two transverse bottom franges

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