第1题：
第一组
An automatic system usually consists of a control system and an information system. A control system is a system which measures the condition of some entity and, with the information, governs the state of a variable; i.e., speed, temperature, pressure, position, etc. The open-loop system is the simplest form. a control system may assume. It is distinguished from the closed-loop system by the lack of an input which measures the state of the controlled variable; such an input is called a feedback. In modern ships the open-loop system has practically disappeared and the closed-loop system which operates with a feed-back is extensively used. An information system serves the parallel function of monitoring system or plant performance. The monitoring function may serve a number of purposes; specifically it may indicate values of controlled variables to guide remote control operations, warn of off-limit conditions and provide record of performance. In many cases a visual and audible alarm may be provided to warn of off-limit conditions on board ship and, associated with this, the important variables will be recorded on demand. The automatic control system can be more sophisticated by incorporating digital-processing equipment, that is, a computer. This computer is usually fed with signals from all sensors. It scans the values of the sensors and generates alarm signals for off-limit conditions, acting as a super-supervisor. Sometimes, it can even make necessary and take the necessary action to optimize performance without human intervention.
The closed-loop system differs from the open-loop system by
A.the lack of a feedback
B.the presence of a feed back
C.the lack of a computer
D.the presence of a computer
第2题：
第3题：
Operation of the valve control release on a fixed CO2 system must immediately ______.
A.release CO2 to the protected space
B.secure all mechanical ventilation in the protected space
C.sound the rig’s general alarm signal for a fire
D.sound an alarm in the ballast control room
第4题：
show hadrware alarms
show system alarms
show chassis state
file list alarm
第5题：
第6题：
What alarm is NOT found on an inert gas system ________．
A.Low oxygen alarm
B.Low pressure alarm
C.Scrubber high water level alarm
D.Deck seal low water alarm
第7题：
第8题：
The CO2 flooding system is actuated by a sequence of steps which are ______.
A.break glass, pull valve, break glass, pull cylinder control
B.sound evacuation alarm, pull handle
C.open bypass valve, break glass, pull handle
D.open stop valve, open control valve, trip alarm
第9题：
Deep-fat cooking equipment shall be fitted with the following:（）
第10题：
break glass，pull valve，break glass，pull cylinder control
sound evacuation alarm，pull handle
open bypass valve，break glass，pull handle
open stop valve，open control valve，trip alarm