【名词&注释】
冷却水(cooling water)、零部件(parts)、充分利用(make full use)、警告牌(warning board)
[单选题]起航时间的长短与()有关。
A. 主机冷却水加温速度
B. 主机燃油加温速度
C. 主机滑油加温速度
D. A+B+C
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学习资料:
[单选题]要充分利用排气余热而降低废气锅炉出口温度t2,同时还应保证锅炉受热面必需的温度,该温差是()。Ⅰ.排气与给水的温度t2-tw;Ⅱ.排气与蒸汽的温度t2一ts
A. 仅Ⅰ对
B. 仅Ⅱ对
C. Ⅰ或Ⅱ对
D. Ⅰ+Ⅱ
[单选题]吊缸主机检修时,应当(),以防止伤人和损坏机件。
A. 合上盘车机
B. 脱开盘车机
C. 在主机操纵部位悬挂警告牌(warning board)
D. 合上盘车机并在主机操纵部位悬挂警告牌(warning board)
[单选题]活塞运动部件失中的原因主要是()。
A. 配合件磨损
B. 发生故障
C. 装配精度低
D. 零部件制造精度低
[单选题]目前铁梨木艉轴承最好的代用材料是()。
A. 赛龙
B. 尼龙
C. 卡普龙
D. 层压胶木
[单选题]Shims of different thicknesses are inserted between the shells to enable adjustment of ().
A. the bearing clearances
B. the bearing thickness
C. the bearing strength
D. the bridge hardne
[单选题]The auxiliary engine and a cgenerator can be connected with ().
A. cam
B. crosshead
C. bulge
D. coupling
[单选题]Which of the following conditions may need to be reduced when operating a large, low speed, main propulsion, diesel engine at low loads?()
A. Injection pressures
B. Control air supply pressure
C. Cooling water flow through after-coolers
D. Lube oil temperature
[单选题]In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in ().
A. two crankshaft revolutions in a two-stroke/cycle engine
B. two power strokes in a two-stroke/cycle engine
C. one power stroke in a two-stroke/cycle engine
D. two piston strokes in a two-stroke/cycle engine
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