An overtaking situation at night would be one in which one vessel sees which light(s) of a vessel ahead?（）

An increasing head pressure in a refrigeration system, without any corresponding change in the cooling water inlet temperature, would probably be caused by （）.

An overtaking situation would be one in which one vessel is approaching another from more than how many degrees abaft the beam? （）

A faulty injection in one cylinder of an operating diesel engine can be located by （）

When two vessels are in sight of one another and NOT in or near an area of restricted visibility，any of the following signals may be given EXCEPT（）.

When an IP packet is Layer 3-switched from a source in one VLAN to a destination in another VLAN,which field in a packet will be rewritten? （）

In(74), the only element that can be deleted or removed is the one that was inserted most recently.

● In （74） the only element that can be deleted or removed is the one that was inserted most recently.（74）

______no air or water, there would be no life in the world.

Jitter is an unwanted variation of one or more characteristics of a periodic signal in electronics and telecommunications and（）refers to call issues that cause variations in timing or time of arrival.

Two vessels are in an overtaking situation.Which of the lights on the overtaken vessel will the overtaking vessel see（）.

An “ABC” dry chemical fire extinguisher would be LEAST effective against a fire in（）.