【Daily Question 20090311】
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1. The fuel gas system of the heating furnace should use (air-open) type control valves, while its feed system should use (air-close) type control valves. 2. In interlock systems, if it is required that the field self-protection solenoid remain energized under normal conditions and lose power during self-protection, the (normally closed) contacts of a relay should be used. 3. The lower the operating power of a relay, the higher its sensitivity. 4. In the field of automation, a state in which the parameters being regulated do not change over time (a steady state) is referred to as the static state of the system. Comment: It’s a simple question; one can get it wrong if not careful ； I hope that when answering, everyone can take some time to think carefully. Mistakes in answers can still be corrected, but if mistakes occur in practice, there may not be a chance to fix them. Additionally: I don’t want the “One Question per Day” feature to become a place where people cheat to get high scores. This post was last edited by chmyh on 2009-3-12 08:43]
1. The fuel gas system of the heating furnace should use (air-shut) type control valves, while its feed system should use (air-open) type control valves. 2. In an interlock system, if it is required that the on-site self-protection solenoid valve remain energized under normal conditions and lose power during self-protection, the (normally open) contacts of a relay should be used. 3. The lower the operating power of a relay, the higher its sensitivity. 4. In the field of automation, the fact that the parameters being regulated do not change over time (the deviation) is referred to as the static nature of the system.
1. The fuel gas system of the heating furnace should use (air-open) type control valves, while its feed system should use (air-close) type control valves. 2. In an interlock system, if it is required that the on-site self-protection solenoid valve remain energized under normal conditions and lose power during self-protection, the (normally closed) contacts of a relay should be used. 3. The lower the operating power of a relay, the higher its sensitivity. 4. In the field of automation, a state in which the parameters being regulated do not change over time (a steady state) is referred to as the static state of the system.
1. The fuel gas system of the heating furnace should use (air-shut) type control valves, while its feed system should use (air-open) type control valves. 2. In interlock systems, if it is required that the on-site self-protection solenoid valve remain energized under normal conditions and lose power during self-protection, the (normally open) contacts of a relay should be used. 3. The lower the operating power of a relay, the higher its sensitivity. 4. In the field of automation, the (deviation) in which the parameter being regulated does not change over time is referred to as the staticity of the system.
1. The fuel gas system of the heating furnace should use (air-shut) type control valves, while its feed system should use (air-open) type control valves. 2. In an interlock system, if it is required that the on-site self-protection solenoid valve remain energized under normal conditions and lose power during self-protection, the (normally open) contacts of a relay should be used. 3. The lower the operating power of a relay, the higher its sensitivity. 4. In the field of automation, the fact that the parameters being regulated do not change over time (the deviation) is referred to as the static nature of the system.
1. Air off, Air on 2. Normally open 3. High 4. Balanced state
1. The fuel gas system of the heating furnace should use (air-shut) type control valves, while its feed system should use (air-open) type control valves. 2. In an interlock system, if it is required that the on-site self-protection solenoid valve remain energized under normal conditions and lose power during self-protection, the (normally open) contacts of a relay should be used. 3. The lower the operating power of a relay, the higher its sensitivity. 4. In the field of automation, the fact that the parameters being regulated do not change over time (the deviation) is referred to as the static nature of the system.
1. The fuel gas system of the heating furnace should use (air-open) type control valves, while its feed system should use (air-close) type control valves. 2. In interlock systems, if it is required that the field self-protection solenoid remain energized under normal conditions and lose power during self-protection, the (normally closed) contacts of a relay should be used. 3. The lower the operating power of a relay, the higher its sensitivity. 4. In the field of automation, a state in which the parameters being regulated do not change over time (a steady state) is referred to as the static state of the system.
1. The fuel gas system of the heating furnace should use (air-shut) type control valves, while its feed system should use (air-open) type control valves. 2. In an interlock system, if it is required that the on-site self-protection solenoid valve remain energized under normal conditions and lose power during self-protection, the (normally open) contacts of a relay should be used. 3. The lower the operating power of a relay, the higher its sensitivity. 4. In the field of automation, the fact that the parameters being regulated do not change over time (the deviation) is referred to as the static nature of the system.
1. The fuel gas system of the heating furnace should use (air-open) type control valves, while its feed system should use (air-close) type control valves. 2. In interlock systems, if it is required that the field self-protection solenoid remain energized under normal conditions and lose power during self-protection, the (normally closed) contacts of a relay should be used. 3. The lower the operating power of a relay, the higher its sensitivity. 4. In the field of automation, a state in which the parameters being regulated do not change over time (a steady state) is referred to as the static state of the system.
Answer: 1. Wind on, Wind off. 2. Normally closed. 3. High. 4. Equilibrium state.
1. The fuel gas system of the heating furnace should use (air-open) type control valves, while its feed system should use (air-close) type control valves. 2. In an interlock system, if it is required that the on-site self-protection solenoid valve remain energized under normal conditions and lose power during self-protection, the (normally closed) contacts of a relay should be used. 3. The lower the operating power of a relay, the higher its sensitivity. 4. In the field of automation, a state in which the parameters being regulated do not change over time (a steady state) is referred to as the static state of the system.
1. Air off, Air on 2. Normally open 3. High 4. Balanced state
1. The fuel gas system of the heating furnace should use (air-open) type control valves, while its feed system should use (air-close) type control valves. 2. In an interlock system, if it is required that the on-site self-protection solenoid valve remain energized under normal conditions and lose power during self-protection, the (normally closed) contacts of a relay should be used. 3. The lower the operating power of a relay, the higher its sensitivity. 4. In the field of automation, a state in which the parameters being regulated do not change over time (a steady state) is referred to as the static state of the system.
1. The fuel gas system of the heating furnace should use (air-shut) type control valves, while its feed system should use (air-open) type control valves. 2. In an interlock system, if it is required that the on-site self-protection solenoid valve remain energized under normal conditions and lose power during self-protection, the (normally open) contacts of a relay should be used. 3. The lower the operating power of a relay, the higher its sensitivity. 4. In the field of automation, the fact that the parameters being regulated do not change over time (the deviation) is referred to as the static nature of the system.
1. The fuel gas system of the heating furnace should use (air-shut) type control valves, while its feed system should use (air-open) type control valves. 2. In an interlock system, if it is required that the on-site self-protection solenoid valve remain energized under normal conditions and lose power during self-protection, the (normally open) contacts of a relay should be used. 3. The lower the operating power of a relay, the higher its sensitivity. 4. In the field of automation, a situation in which the parameters being regulated do not change over time (a steady state) is referred to as the static state of the system.
1. The fuel gas system of the heating furnace should use (flow-on (FC)) type control valves, while its feed system should use (flow-off (FO)) type control valves. 2. In an interlock system, if it is required that the on-site self-protection solenoid valve remain energized under normal conditions and lose power during self-protection, the (normally open) contacts of a relay should be used. 3. The lower the operating power of a relay, the higher its sensitivity. 4. In the field of automation, a state in which the parameters being regulated do not change over time (a steady state) is referred to as the static state of the system.
1. The fuel gas system of the heating furnace should use (air-shut) type control valves, while its feed system should use (air-open) type control valves. 2. In an interlock system, if it is required that the on-site self-protection solenoid valve remain energized under normal conditions and lose power during self-protection, the (normally open) contacts of a relay should be used. 3. The lower the operating power of a relay, the higher its sensitivity. 4. In the field of automation, the fact that the parameters being regulated do not change over time (the deviation) is referred to as the static nature of the system.
1. Wind on, Wind off 2. Normally closed 3. High 4. Balanced state