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______ of the following statements is（are）correct regarding motor lifeboats on cargo vessels．① The motor of each lifeboat shall be operated in the ahead and astern position for a period of not more than 5 minutes once in each week；② The fuel tank of all motor-propelled lifeboats shall be emptied and the fuel changed at least once in every year．
A.① only
B.② only
C.Both ① and ②
D.Neither ① nor ②
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更多 “ ______ of the following statements is（are）correct regarding motor lifeboats on cargo vessels．① The motor of each lifeboat shall be operated in the ahead and astern position for a period of not more than 5 minutes once in each week；② The fuel tank of all motor-propelled lifeboats shall be emptied and the fuel changed at least once in every year．A.① onlyB.② onlyC.Both ① and ②D.Neither ① nor ② ” 相关考题
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单选题Which of the following statements is TRUE regarding crane operations（）.A
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单选题Which of the following statements is correct regarding a turbocharged four-stroke/cycle diesel generator?（）A
At zero load the intake manifold pressure is greater than the exhaust manifold pressureB
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At full load the intake manifold pressure is less than the exhaust manifold pressureD
At full load the intake manifold pressure is greater than the exhaust manifold pressure
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单选题Which of the following actions are stated in the correct order prior to loading or discharging cargo on a Ro-Ro vessel? （）A
Lower the stern ramp，raise/open the stern door，turn on ventilation for cargo holdsB
Turn on ventilation for cargo holds，raise/open the stern door，lower the stern rampC
Turn on ventilation for cargo holds，lower the stern ramp，raise/open the stern doorD
Raise/open the stern door，lower the stern ramp，turn on ventilation for cargo holds
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单选题Which of the following statements is correct regarding an oil with a high viscosity index?（）A
A large change of viscosity occurs with a minor change in temperatureB
No change in viscosity occurs with any change in temperatureC
Very little change in viscosity occurs with a significant change in temperatureD
The viscosity of the oil increases with an increase in temperature
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单选题The functioning of the radiotelegraph installations for motor lifeboats and/or the portable radio apparatus for survival craft，if provided，（）with the provisions of the regulations.A
providedB
suppliedC
compliedD
divided
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