更多"Which one is not true?（）"的相关试题:
[单项选择]Which one of following statement is not true concerning the suitable sites of the direct acting relief valve and the pilot operated relieve valve?（）
A. the direct acting relief valve is used for controlling lower flows and pressure
B. the pilot operated relief valve is used for controlling higher flows and pressure
C. the pilot operated relief valve is used for controlling lower flows and pressure
D. the controlling accuracy of direct acting relief valve is worse than that of the pilot operated relief valve
[单项选择]Which one is true as regards to the hard hat according to the passage?（）
A. It needs not to be regularly replaced
B. It is designed to protect from possible impact
C. It is required to be worn on deck at all times by all ships
D. fibreglass hardhat should not be used on board ships
[单项选择]Which one of the following is not true according to the passage?（）
A. It’s important to make clear the chain of command within the vessel
B. It is primarily your own responsibility to look after your person safety
C. The porthole is the first choice to escape when in emergency
D. all cabins are fitted with a Survival at Sea Manual
[单项选择]An overtaking situation would be one in which one vessel is approaching another from more than how many degrees abaft the beam? （）
A. 0°
B. 10°
C. 22.5°
D. None of the above
[单项选择]Which statement is TRUE concerning radiotelephones on board towing vessels?（）
A. There cannot be a radiotelephone located anywhere except in the wheelhouse
B. The officer in charge of the wheelhouse is considered to have the radiotelephone watch
C. Only distress messages may be transmitted over channel 13
D. Only the Master of the vessel is allowed to speak over the radiotelephone
[单项选择]Which is TRUE concerning immersion suits and their use?（）
A. Only a light layer of clothing may be worn underneath
B. They provide sufficient flotation to do away with the necessity of wearing a life jacket
C. They should be tight fitting
D. A puncture in the suit will not appreciably reduce its value
[单项选择]Which statement is TRUE concerning lifeboat gripes?（）
A. They must be released by freeing a safety shackle
B. They should not be released until the boat is in lowering position
C. They may be adjusted by a turnbuckle
D. They are normally used only with radial davits
[单项选择]Which statement is TRUE concerning gasoline vapors on board a vessel（）.
A. They are heavier than air and will settle in the lowest part of the vessel
B. They are lighter than air and will settle in the highest part of the vessel
C. They should be vented into the engine to improve combustion
D. They should be vented into the wheelhouse
[单项选择]Which statement is TRUE concerning the ventilation of engine and fuel tank compartments on uninspected towing vessels using fuel with a flash point of 100°F?（）
A. There shall be at least 3 ventilator ducts open to the atmosphere
B. At least one exhaust duct shall extend from the open atmosphere to the lower portion of the bilge
C. At least one intake duct shall extend from the open atmosphere to the lower portion of the bilge
D. Only vessels using fuel with a flash point above 110°F need ventilate engine and fuel compartments
[单项选择]Which statement is TRUE（）.
A. You need not keep a record of ground garbage dumped into the sea more than 25 miles offshore
B. You must keep a record of garbage discharged in port to a shore facility
C. You need not keep a record of garbage incinerated on the ship
D. You must keep a record of the approximate weight of the garbage dumped
[单项选择]Which statement is TRUE concerning equatorial tides（）.
A. They occur when the Sun is at minimum declination north or south
B. They occur when the Moon is at maximum declination north or south
C. The difference in height between consecutive high or low tides is at a minimum
D. They are used as the basis for the vulgar establishment of the port
[单项选择]Which is TRUE of a stiff vessel? （）
A. It has a small GM
B. It pitches heavily
C. It has an unusually high center of gravity
D. Its period of roll is short
[单项选择]Which statement is TRUE concerning spare charges for portable fire extinguishers on unmanned tank barges?（）.
A. Spare charges shall be carried for at least 50 percent of each size and variety required on board
B. If the unit cannot be charged by the vessel's personnel，one spare unit shall be carried in lieu of spare charges
C. Spare charges shall be stowed in watertight containers on deck
D. Regulations concerning spare charges do not apply to unmanned barges
[单项选择]Which statement is TRUE concerning the danger signal?（）.
A. When any vessel fails to understand the intentions of an approaching vessel she must sound the danger signal
B. Only the stand-on vessel can sound the danger signal
C. Distress signals may be used in place of the danger signal
D. The danger signal consists of 4 or more short blasts of the whistle
[单项选择]Which statement is TRUE concerning fuel vapors on a vessel（）.
A. Fuel vapors gather in the lowest portions of the vessel
B. Fuel vapors can only be ignited by an open flame
C. Vent outlets should be located above the level of the carburetor air intake
D. None of the above
[单项选择]Which statement is TRUE in an overtaking situation（）.
A. One vessel is approaching another vessel from more than 20° abaft the beam
B. It is the duty of the vessel being overtaken to get out of the way
C. Any later change of bearing between the two vessels shall not make the overtaking vessel a crossing vessel
D. All of the above
[单项选择]Which statement is TRUE concerning protection of double bottom tanks against excessive pressure? （）
A. Each vent for the tank must be equal to the area of the tank filling line
B. The tanks must be protected by overflows
C. The total area of the vents or the overflow shall be at least equal to the area of the fill line
D. There must be twice as much vent area as the area of the fill line
