泽熙美文1 /5题 [单选题]Radiation can spread a fire by _______.
A transmitting the heat of a fire through the ship’s metal
B burning liquids flowing into another space
C heated gases flowing through ventilation systems
D the transfer of heat across an unobstructed space
正确答案: D
2 /5题 [单选题]The four basic components of a fire are chain reaction，heat，fuel，and _______.
A carbon monoxide
B oxygen
C carbon dioxide
D any gaseous substance
正确答案: B
3 /5题 [单选题]The four basic components of a fire are fuel，heat，oxygen and a chain reaction.Which of the following statements best describes what must be eliminated to extinguish a fire？
A Any one component can be eliminated to extinguish a fire.
B Any two components must be eliminated to properly extinguish a fire.
C Any three components must be eliminated to properly extinguish a fire.
D All four components must be eliminated to extinguish any fire.
正确答案: A
4 /5题 [单选题]A fuel/air mixture below the lower explosive limit is too _______.
A rich to burn
B lean to burn
C cool to burn
D dense to burn
正确答案: B
5 /5题 [单选题]Which of the following conditions is true concerning a flammable liquid with a concentration above the upper explosive limit？
A The mixture is too lean to burn.
B The mixture is too rich to burn.
C The vapor is about to explode.
D Conditions are perfect for combustion.
正确答案: B
1 /5题 [单选题]Before the seas get rough，it is a good safety practice to _______.
A secure loose gear
B move quickly about the ship
C increase lighting
D shutdown auxiliary equipment
正确答案: A
2 /5题 [单选题]Sea chest valves should never be _______.
A left partially open
B left closed
C left open
D secured with a lock
正确答案: D
3 /5题 [单选题]When maintenance personnel are working on electrical equipment，all supply switches should be secured in the open position and tagged specifically by the _______.
A watch engineer
B chief engineer or first assistant
C chief electrician
D person performing the repair
正确答案: D
4 /5题 [单选题]Which of the listed conditions can be considered as the single greatest cause of accidents？
A Speed.
B Excessive knowledge or skill.
C Human error.
D Excitement.
正确答案: C
5 /5题 [单选题]In machinery space，the valves，pipes should be _______.
A arranged as close to each other as possible to save space
B arranged far away from each other for convenient operation
C fixed or clamped to avoid vibration
D kept easy removable as to convenient operation
正确答案: C
1 /5题 [单选题]During ship maneuvering，when the diesel is stopped，which of the following items is wrong？
A Keep all systems in normally running.
B Main engine is available at any moment.
C Shut off the starting air bottle outlet valve.
D Pay attention to the charges of the system parameters.
正确答案: C
2 /5题 [单选题]After“Finished With Engine”，which of the following cannot be shut off by the duty engineer？
A Fuel oil booster pump.
B The main starting valve.
C The sea chest.
D The main cooling sea water pump.
正确答案: C
3 /5题 [单选题]When the ship，its main propulsion device equipped with clutch，arrived at the port and finished with the engine，the correct operation should be _______.
A disengaging the clutch firstly，then stopping the main engine
