单项选择题
If a hydraulic pump is overheating, the cause may be （）.
A.excessive internal leakage in the pump B.low discharge pressure and fluid flow C.excessive fluid level in the hydraulic reservoir D.operation of the pump at 100% efficiency
单项选择题 The motor for the fresh water pump （）.
单项选择题 I remember （）the oil separator the day before yesterday But it failed again.
单项选择题 During bunkering, the request for stoppage of pumping shall be made, as a rule, 5 minutes （）.
