网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
STEAM教育最早发源于（）
A．英国
B．德国
C．中国
D．美国
参考答案和解析
错误
更多 “STEAM教育最早发源于（）A．英国B．德国C．中国D．美国” 相关考题
考题
Paragraph4_____A.Dry steam plants
B.Binary plants
C.Origin of geothermal energy
D.Generation of electricity
E.Flash steam plants
F.Recyclable water and steam
考题
单选题Before starting a reciprocating, steam-driven pump that has been idle for a period of time, you should （）.A
open the steam line mot valveB
drain the steam cylinderC
close the steam cylinder drainsD
open the liquid cylinder drains
考题
单选题The steam boiler is part of a closed loop steam, whereby, after the energy of the steam is used up and it becomes water again, （） is collected and returned back to the boiler for heating up again to steam.A
the formerB
the firstC
the latterD
the last
考题
单选题What is NOT a function of the steam drum of a marine water-tube boiler（）.A
Receives saturated steam from the generating tubesB
Serves as a reservoir of boiler feed waterC
Holds internal fittings for separation of moisture from steamD
Collects steam exhausted from the turbines
考题
单选题Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）A
double bottom fuel oil tank temperatureB
heater supply steam flowC
pressure of the fuel supplied to the burnersD
attemperator steam flow in the heater discharge circuit
考题
单选题The boiler feed pump discharge pressure is higher than the steam drum pressure to （）.A
ensure feed water flow into the boilerB
keep the steam drum pressure highC
prevent water hammer in the feed lineD
help the feed water flash to steam
考题
单选题The water level in a steaming auxiliary boiler will always （）A
rise when the steam pressure is increasedB
remain constant as long as the feed pump operatesC
fall when the steam pressure is decreasedD
vary as the steam demand changes
热门标签
最新试卷