A: scum valve
B: soot blower
C: blow-down valve
D: vent cock
举一反三
- The()is fitted in the steam supply line and is usually of the<br/>non-return type. A: main steam stop valve B: auxiliary steam stop valve C: feed check or control valve D: blow down valve
- Valve in the heart enables it to function by opening and closing, preventing blood from passing through. A: 正确 B: 错误
- In a refrigeration system, if the cooling water to the condenser fails, the（）. A: box temperature solenoid valve will close B: expansion valve will close C: compressor will shutdown D: king valve will ope
- Washing the food down with water as a substitute______chewing is not a good habit. A: of B: for C: to D: from
- The word "valvulotome" means _______________. A: incision of a valve B: an opening of the valve C: an instrument for cutting a valve D: surgical repair of a valve
内容
- 0
Which of the following hydraulic control valves belongs to pressure control valve （ ）. A: Unloading valve B: overflow throttle valve C: Hydraulic control check valve D: Low pressure selector valve
- 1
The commonly used pressure control valve in hydraulic transmission system is ( ) A: directional valve B: relief valve C: hydraulic control check valve
- 2
A three-way thermostatic control valve regulates the diesel engine cooling water temperature by passing a portion of the water _____.
- 3
In order to ensure that the pressure difference between the front and rear of the throttle valve remains unchanged when the load changes, the flow through the throttle valve is basically unchanged. The throttle valve is often connected with ( ) to form a speed control valve, or the throttle valve and ( ) are connected in parallel to form a bypass speed control valve. A: Pressure reducing valve B: constant pressure reducing valve C: overflow valve D: differential pressure relief valve
- 4
A throttle valve is a simple flow control valve, a throttle valve is virtually equal to( ).