【名词&注释】
机械设备(mechanical equipment)、饱和度(saturation)、动力装置(power plant)、警告牌(warning board)
[单选题]总曲折是()。
A. 从曲轴输出端法兰开始平轴,在艉轴首法兰处所测得的曲折值
B. 从艉轴首法兰开始平轴,在曲轴输出端法兰处所测得的曲折值
C. A或B
D. 以曲轴输出端法兰为基准测得的曲折值
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学习资料:
[单选题]下述关于机舱饱和度ks和kv的说明,哪一项是错误的()。
A. ks和kv大表示机舱内机械设备布置得紧凑,利用程度高
B. ks和kv小表示机舱利用程度差
C. ks和kv小时,机舱的通风、散热差,管理维修不方便
D. 应保证动力装置正常工作和维修条件下,选取较大的ks和kv值
[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]Which of the following is a factor of fuel oil almost having nothing to do with the formation of combustion products?()
A. setting point
B. ash
C. sulfur content
D. carbon residue
[单选题]Fins are installed on the generating tube surfaces in waste heat boilers to ().
A. prevent soot fires in the exhaust system
B. prevent exhaust gas erosion of the tubes
C. increase the velocity of exhaust gas flow
D. increase the rate of heat transfer
[单选题]The amount of fuel injected in a particular time, or degree, of crankshaft rotation is termed ().
A. metering
B. timing
C. rate of injection
D. rate of distributio
[单选题]How would the exhaust of a properly operating diesel engine appear?().
A. Light blue haze
B. Light brown haze
C. Light gray haze
D. Perfectly clear
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