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单选题 Maintenance requirements for the deck machinery are usually minimal but _________should be undertaken
学科：默认课程
时间：2025-12-10 23:28:39
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题目1单选题
What type of valve is used to direct the flow of hydraulic fluidA. Stop valveB. Relief valveC. Direction control valveD. Pressure control valve
题目2单选题
Check valve isn't used to control _________A. high pressure overflowB. direction of oil flowC. bypass of filterD. back pressure of return oil
题目3单选题
Relief valves are usually used to _________A. control the direction of oil flowB. make the pressure after relief valve steadyC. control the fluid flow through itD. prevent the pressure before relief valve over the specified value
题目4单选题
Generally, the symbol (GB786. 1-93) of overflow valve is _________A. 图像DB. 图像AC. 图像BD. 图像C
题目5单选题
Generally, the symbol (GB786. 1-93) of pressure reducing valve is _________A. 图像AB. 图像CC. 图像DD. 图像B
题目6单选题
The symbol (GB786. 1-93) represents _________A. overflow valveB. sequence valveC. reducing valveD. relief valve
题目7单选题
_________is/are used to limit the pressure in any particular portion and mainly control the pressure after the valveA. Check valvesB. Safety valvesC. Relief valvesD. Reducing valve
题目8单选题
Delivery lines and discharge lines to and from the pump are often fitted with_________ to prevent the liquid from flowing backA. non-return valvesB. pressure reduce valvesC. butterfly valvesD. three-way valves
题目9单选题
_________are used to protect the system from over pressureA. stop valvesB. relief valvesC. reducing valvesD. direction control valves
题目10单选题
Maintenance requirements for the deck machinery are usually minimal but _________should be undertakenA. regular observationB. regular operationC. regular inspection and servicingD. regular testing
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