航海英语试题六

试题六

一．单项选择题

1. your nessel is approaching a bend. You hear a prolonged blast from

around the bend. You should______.

A. back your engines

B. stop your engines and drift

C. answer with one prolonged blast

D. sound the danger signal

2. you hear the fog signal of another vessel forward of your beam. Risk

of collision may exist. you ______.

A. begin a radar plot

B. stop your engines

C. take all way off, if necessary

D. all of the above

3. Deep draught vessels may have to make use of the height of tide in

order to have a safe under keel clearance in areas where depths are ______.

A. sufficient

B. normal

C. abnormal

D. critical

4. Buoys are generally described in detail only when they have special

navigational ______, or where the scale of the chart is too small to show all the details clearly.

A. danger

B. aids

C. significance

D.

appropriateness

5. Your radar is set on a true motion display. Which of the following will NOT

appear to move across the PPI scope?

A.Echoes from a buoy

B.Own ship's marker

C. Echo from a ship on the same course at the same speed

D. Echo from a ship on a reciprocal course at the same speed

6. The abbreviation PPI in the Sperry Collision Avoidance System means

_______．

A. plan position indicator

B. plain position indicator

C. plane position indication

D. policy proof of interest

7. Your vessel is anchored in an open roadstead with three shackles of

chain out on the port anchor. The wind freshens considerably and the anchor begins to drag. Which action should you take FIRST?

A. Drop the starboard anchor short with about one shot of chain

B. Sheer out to starboard using the rudder，then drop the starboard

anchor with about four shots of

chain

C. Put the engines slow ahead to help the anchor

D. Veer out more chain on the port anchor

8. which vessel should not impede the navigation of a power-driven

vessel?

A. a vessel not under command

B. a vessel engaged in fishing

C. a sailing vessel

D. a seaplane

9. A plane that cuts the Earth's surface and passes through the poles

will always form ______.

A. the equator

B. a meridian

C. a small circle

D. a

loxodromic curve

10. You are attempting to locate your position with reference to a

hurricane center in the Northern Hemisphere．If the wind direction remains steady but velocity diminishes with time，you are most likely ______．

A. in the right semicircle

B. in the left

semicircle

C. on the storm track ahead of the center

D. on the storm track

behind the center

11. A coastal current ______.

A. is generated by waves striking the beach

B. flows outside the

surf zone

C. flows in a circular pattern

D. is also known as

a longshore current

12. If you must pump bilges while a vessel is in port，you should pump

only ______.

A. if discharge is led to a shore tank or barge

B. during the hours

of darkness

C. on the outgoing tide

D. as much as is

necessary

13. The mariner must be the final judge of the reliance he can place on

the information given in the Admiralty charts and other publications，since they ______．

A. may always be complete and up-to-date

B. may not always be complete and up-to-date

C. may sometimes be complete and up-to-date

D. may not sometimes be complete and up-to-date

14. On a twin-screw，twin-rudder vessel，the most effective way to turn

in your own water，with no way on，is to put ______.

A. one engine ahead and one engine astern，with full rudder

B. one engine ahead and one engine astern，with rudders amidships

C. both engines ahead，with full rudder

D. both engines astern，with full rudder

15. You must shore up the collision bulkhead due to solid flooding forward.

The bulkhead approximates a triangle. The center of pressure of the shores on the bulkhead should be located ______.

A. evenly over the surface of the bulkhead

B. approximately one-half the height of the bulkhead