更多"The camshaft drive is designed to m"的相关试题:
[单项选择]While on watch at sea you must maintain a proper lookout at all times. On a 700-foot cargo vessel being hand-steered during daylight hours in good visibility and clear of any navigational hazards，the lookout may be（）.
A. the helmsman
B. the mate on watch
C. Either A or B
D. Neither A nor B
[单项选择]Every vessel shall（）maintain a proper look-out by sight and hearing as well as by all available means appropriate in prevailing circumstances and conditions so as to make a full appraisal of the situation and of the risk of collision.
A. in fog
B. at night
C. in narrow fairway
D. at all times
[单项选择]An instrument designed to maintain a continuous record of atmospheric pressure is a(n)（）.
A. mercurial barometer
B. aneroid barometer
C. barograph
D. thermograph
[单项选择]In a four-stroke engines the camshaft rotates at （）.
A. half the engine rotational speed
B. twice the engine rotational speed
C. the engine rotational speed
D. four times the engine rotational speed
[单项选择]If a camshaft-less engine has a normal injection pressure at rated speed, the injection pressure will be at slow speed（）
A. too low
B. a little lower
C. a little higher
D. exactly the same
[单项选择]（） is usually driven by the engine camshaft and supplies pilot air to the cylinder air start valve.
A. An air receiver
B. An operating valve
C. An automatic valve
D. An air distributor
[单项选择]The camshaft on a four-stroke/cycle diesel engine provides a means to operate the （）.
A. fuel injectors
B. exhaust valves
C. intake valves
D. all of the above
[单项选择]（） for the camshaft gear train is taken from a spur gear which for a six cylinder engine is at the coupling end.
A. The driven gear
B. The drive
C. The grease
D. The lubricating oil
[单项选择]In a four-stroke engine the camshaft rotates at （）.
A. half the engine speed
B. twice the engine speed
C. the engine speed
D. four times the engine speed
[单项选择]In a four-stroke/cycle diesel engine, the camshaft rotates at （）
A. twice the crankshaft speed
B. half the crankshaft speed
C. the same speed as that of the crankshaft
D. a speed independent of that of the crankshaft
[单项选择]The speed of the camshaft in a two-stroke/cycle diesel engine, running at 950 RPM, is （）.
A. 475 RPM
B. 950 RPM
C. 1900 RPM
D. 2400 RPM
[单项选择]Proper GMDSS watchkeeping includes（）.
A. monitoring all required frequencies in the proper mode
B. reading all displays and/or printouts after silencing an alarm
C. notifying the Master of any distress alerts
D. All of the above
[单项选择]Two important considerations for the proper lubrication of a diesel engine include the delivery of the oil in sufficient amount and the （）.
A. cetane number
B. pour point
C. viscosity temperature
D. quality of the oil
[单项选择]The company should establish and maintain procedures to control all documents and date which are relevant to（）.
A. ISM
B. SOLAS
C. DOC
D. SMS
[单项选择]Which is the proper method of determining whether a portable CO2 fire extinguisher needs recharging?（）
A. Check the tag to see when the extinguisher was last charged
B. Release a small amount of CO2; if the CO2 discharges，the extinguisher is acceptable
C. Weigh the extinguisher and compare the weight against that stamped on the valve
D. Recharge the extinguisher at least once each year
[单项选择]Proper operation of the main engine reduction gear set requires the operation to monitor （）
A. the sump oil level
B. oil flow sight glasses
C. bearing temperatures
D. all of the above
[单项选择]Proper atomization of fuel in diesel engine combustion chambers will （）.
A. affect the injection pressure
B. improve combustion
C. reduce compression pressure
D. decrease power output
