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Your vessel is equipped with a fixed CO2 system and a fire main system. In the event of an electrical fire in the engine room what is the correct procedure for fighting the fire?()
A . Use the CO
system and evacuate the engine room
B . Use the fire main system and evacuate the engine room
C . Evacuate the engine room and use the CO
system
D . Evacuate the engine room and use the fire main system
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When would you ground an electric hand tool?()
A . When it is a DC machine
B . When it is an AC machine
C . Any machine that operates on over 100 volts
D . Only when working on wet steel plate
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The () is a crystal which, under pressure, produces an electric current which varies with the pressure.
A . alternator
B . glass thermometer
C . burdon tube
D . piezoelectric pressure transducer
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If the electric motor driving an air compressor fails to start, the cause may be a ().
A . leaking unloader
B . tripped circuit breaker
C . control line leak
D . defective pop valve
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Electric circuits are protected against overloads and short circuits by means of a/an ().
A . circuit breaker
B . amplifier
C . diode
D . capacitor
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If a small electric motor is immersed in salt water it should be () (1) washed in fresh water (2) dried in an oven
A . (1) only
B . (2) only
C . both (1) and (2)
D . neither (1) or (2)
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Your vessel is equipped with a fixed C02 system and a fire main system. In the event of an electrical fire in the engine room what is the correct procedure for fighting the fire?().
A . Use the C0
system and evacuate the engine room
B . Use the fire main system and evacuate the engine room
C . Evacuate the engine room and use the C0
system
D . Evacuate the engine room and use the fire main system
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A casualty report of an intentional grounding of a ship is required under what condition?()
A . Under any condition
B . If the grounding lasts over 24 hours
C . If it creates a hazard to the environment
D . At the owner's discretio
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The backup system on an electric start survival craft is a().
A . hydraulic system
B . pneumatic system
C . spare battery
D . hand crank
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Accidental grounds in a shipboard electrical system must be repaired as soon as possible as they will ()
A . result in immediate power outages
B . damage circuit breakers
C . appear on the ground detection system
D . damage insulation and may cause outage
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A casualty report of an intentional grounding is required under what condition?().
A . Under any condition
B . If the grounding lasts over 24 hours
C . If it creates a hazard to the environment
D . At the owner's discretio
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A fire in an electrical generator is considered to be ().
A . Class "A"
B . Class "B"
C . Class "C"
D . Class "D"
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Aboard ship, a grounded field coil in an AC motor can be determined by using a ().
A . portable growler
B . galvanometer
C . visual inspection
D . megohmmeter
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In an alternating current electrical system, a low system power factor is a direct sign of ()
A . wasted energy
B . efficient operation
C . a short in the exciter field windings
D . an excessive number of minor system ground
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A transformer in an electric circuit serves to ()
A . generate its own electrical power
B . transform electrical energy into mechanical energy
C . increase or decrease circuit voltage as required
D . convert AC current to DC current
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The main purpose of an electric space heater installed in a large AC generator is to ()
A . prevent the windings from becoming brittle
B . prevent moisture from condensing in the windings during shutdown
C . prevent acidic pitting of the slip rings
D . keep the lube oil warm for quick starting
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An electrical device which prevents an action from occurring until all other required conditions are met is called a/an ().
A . limit
B . monitor
C . modulator
D . interlock
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When a rescuer finds an electrical burn victim in the vicinity of live electrical equipment or wiring,his first step is to().
A . flush water over any burned area of the patient
B . apply ointment to the burned areas on the patient
C . get assistance to shut down electrical power in the area
D . remove the patient from the vicinity of the live electrical equipment or wiring
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An old bus ground to a halt at the bus stop.
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The ___________(转变,改造)of nuclear radiation directly into electricity was an exciting possibility that was being explored in 1950s.
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They are going to have the serviceman ____ an electric fan in the office tomorrow.
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__________ A) In shopping centers or churches. B) In community or parking lots. C) On playgrounds or country grounds. D) In public parks or on county grounds.
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Where do cars get their energy from? For most cars, the answer is petrol. 1_____some cars use electricity. These cars have 2 _____motors that get their power from large batteries. In 3___, there are even cars that have 4_____ an electric motor and a petrol motor. These types of cars are 5_____ hybrid (混合) cars.
Most people tend to think of electric cars as a new 6 ____, but they have been around for a long time. In the 7_____ 19th and early 20th centuries electric cars were common because the technology for petrol engines was not very advanced.But 8____ the petrol engine became easier to make and more powerful, this type of engines became the most 9 ____.Interest in electric cars was high in the l970s and 1980s because 10____ became very expensive.Recently, electric cars have again become well-liked because people want cars that pollute 11_____.
Electric cars are better than petrol cars 12______ several ways. The biggest benefit is reduced pollution.In areas 13_____ there is a high percentage of electric cars, pollution is not that serious. The second benefit of electric cars is a 14 _____in the dependence on foreign oil.Several countries don’t want to 15 _____on oil from other countries. Since electric cars can run on electricity from coal or nuclear power stations, there is less need to import oil.
(15分)
(1)第1题最佳答案应选()(1分)
A. But
B. Nor
C. Or
D. And
(2)第2题最佳答案应选()(1分)
A. traditional
B. common
C. same
D. special
(3)第3题最佳答案应选()(1分)
A. summary
B. detail
C. time
D. addition
(4)第4题最佳答案应选()(1分)
A. all
B. both
C. either
D. neither
(5)第5题最佳答案应选()(1分)
A. described
B. regarded
C. called
D. known
(6)第6题最佳答案应选()(1分)
A. invention
B. influence
C. instrument
D. intention
(7)第7题最佳答案应选()(1分)
A. last
B. beginning
C. recent
D. late
(8)第8题最佳答案应选()(1分)
A. unless
B. after
C. before
D. until
(9)第9题最佳答案应选()(1分)
A. popular
B. comfortable
C. difficult
D. dangerous
(10)第10题最佳答案应选()(1分)
A. motors
B. power
C. cars
D. oil
(11)第11题最佳答案应选()(1分)
A. much
B. more
C. less
D. few
(12)第12题最佳答案应选()(1分)
A. by
B. in
C. at
D. on
(13)第13题最佳答案应选()(1分)
A. when
B. where
C. what
D. which
(14)第14题最佳答案应选()(1分)
A. start
B. need
C. reduction
D. rise
(15)第15题最佳答案应选()(1分)
A. put
B. hold
C. rely
D. keep
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Engineering students are supposed to be examples of practicality and rationality, but when it comes to my college education I am an idealist and a fool. In high school I wanted to be an electrical engineer and, of Course, any sensible student with my aims would have chosen a college with a large engineering department, famous reputation and lots of good labs and research equipment. But that's not what I did.
I chose to study engineering at a small liberal-arts university that doesn't even offer a major in electrical engineering. Obviously, this was not a practical choice; I came here for more noble reasons. I wanted a broad education that would provide me with flexibility and a value system to guide me in my career. I wanted to open my eyes and expand my vision by interacting with people who weren't studying science or engineering. My parents, teachers and other adults praised me for such a sensible choice. They told me I was wise and mature beyond my 18 years, and I believed them.
I headed off to college, feeling sure I was going to have an advantage over those students who went to big engineering "factories" where they didn't care if you had values or were flexible. I was going to be a complete engineer: technical genius and sensitive humanist all in one.
Now I'm not so sure. Somewhere along the way my noble ideals crashed into reality, as all noble ideals eventually do. After three years of struggling to balance math, physics and engineering courses with liberal arts courses, I have learned there are reasons why few engineering students try to reconcile engineering with liberal-arts courses in college.
The reality that has blocked my path to become the typical successful student is that engineering and the liberal arts simply don't mix as easily as I assumed in high school. Individually they shape a person in very different ways; together they threaten to confuse. The struggle to reconcile the two fields of study is difficult.
The author chose to study engineering at a small liberal-arts university because he ______.
A.intended to be a sensible student with noble ideals
B.wanted to be an example of practicality and rationality
C.intended to be a combination of engineer and humanist
D.wanted to coordinate engineering with liberal-arts courses in college
此题为多项选择题。