Deciding the method of control by:
A. The purpose of valve
B. Type of fluid
C. Design and purpose of the system
D. All of the mentioned
Answer:D
Deciding the method of control by:
A. The purpose of valve B. Type of fluid C. Design and purpose of the system D. All of the mentioned
Explanation: Valves may be controlled manually, electrically, mechanically, pneumatically, hydraulically or by combination of these methods and they are used to control the flow of liquid by onstructing the flow.