默认题库 - 大风浪中航行

单选题

Point Judith Harbor of Refuge（）.

A. is used mostly by towing vessels
B. has a maximum depth of 14 feet (4.3 meters) at MHW
C. West Gap has a controlling depth of 24 feet
D. is entered through the East Gap or the West Ga

查看答案

单选题

The area around Cape Charles is（）.

A. low and bare，but the land back of it is high and wooded
B. composed of low to medium rolling hills
C. well defined with rocky outcroppings
D. marked by high，barren hill

查看答案

单选题

The preferred method of controlling external bleeding is by（）.

A. direct pressure on the wound
B. elevating the wounded area
C. pressure on a pressure point
D. a tourniquet above the wound

查看答案

单选题

The vertical movement of a vessel in the water is called（）.

A. pitch
B. sway
C. heave
D. roll

查看答案

单选题

When taking soundings on a floating ship，the tape should be lowered and brought back quickly to（）.

A. reduce the time the sounding tube is open
B. avoid creating a spark
C. lessen the effect of roll or pitch on the reading
D. lessen the effect of heave on the reading

查看答案

单选题

Which statement is TRUE concerning a towing vessel which，due to the nature of her work，is unable to keep out of the way of another vessel?（）

A. By day，she shall carry a black cylinder shape
By day，she shall carry two black balls in a vertical line
C. By night，she would show the same lights as a vessel not under command
D. By day，she would show the same shapes as a vessel restricted in her ability to maneuver

查看答案

单选题

Which statement is TRUE concerning hawser towing? （）

A. The catenary in a hawser should be sufficient so that the hawser just touches the bottom
B. The hawser is of sufficient length for towing when taut between tug and tow
C. Increasing speed usually increases the catenary in the hawser
D. Shortening the tow hawser generally decreases the maneuverability of the tug

查看答案

单选题

When a deck cargo is secured with chain or wire lashings and grab (pear) links，which statement is FALSE?（）

A. The amount of take-up is limited by the length of the turnbuckle
B. At the grab (pear) link，the slack end of chain should be led back and secured to the chain above the link
C. The lashings should be inspected each day and any slack taken up
D. The turnbuckle should be secured with a stick or lock nut

查看答案

单选题

The distance that a ship moves forward with each revolutionof its propeller，if there is no slip，is called（）.

A. advance
B. head reach
C. pitch
D. transfer

查看答案

单选题

Which characteristic is a disadvantage of a controllable- pitch propeller as compared to a fixed-pitch propeller? （）

A. Slightly higher fuel consumption
B. Lack of directional control when backing
C. Inefficient at high shaft RPM
D. Some unusual handling characteristic

查看答案