海船船员 - 三管轮

单选题

In the sentence “In some designs the cylinder oil is timed so that the oil injects only on

A. piston crown
B. piston ring groove
C. piston skirt
D. piston ring area

单选题

A. engine overload
B. low combustion temperature
C. plugged fuel nozzle holes
D. excessive compression pressure

单选题

A. misalignment or worn main bearings
B. insufficient cylinder lubrication
C. defective or poorly fitted valves
D. All of the above

单选题

A. The piston rod
B. The push rod
C. The sounding rod
D. The connecting rod

单选题

A. slightly acidic
B. slightly alkaline
C. no salty
D. slightly bitter

单选题

A. steam trap
B. check valve
C. separator
D. strainer

单选题

A. 每月应检查一次安全阀阀盘漏汽否
B. 每月应升高汽压做开启试验一次
C. 2个安全阀开启试验应逐个进行
D. 锁紧安全阀应设法顶紧阀杆顶部而不应过度压缩弹簧

单选题

A. 克服吸排管路阻力
B. 制造泵内真空C克服吸排液面压差
C. 提升液体至一定高度

单选题

A. a separator
B. oil
C. water
D. an oil collecting space

单选题

A. 四冲程柴油机排气阀在膨胀行程的上止点前打开
B. 四冲程柴油机排气阀在排气行程的上止点前关闭
C. 四冲程柴油机排气阀在膨胀行程的下止点前打开
D. 四冲程柴油机排气阀在排气行程的上止点关闭