Review Unit 7 part 2

Refer to the sequential control simulator schematic diagram, what happen when tank 2 reaches high level and LS2 opened?

• CR8 energized and CR9,CR2 de-energized and starting pump 2

• CR8 de-energized and CR9,CR2 energized and starting pump 2

• CR6 de-energized and CR4 and C1 stop the pump 1

• SV2 stop the pump 2

Refer to the schematic diagram of sequential control simulator, what happen when pushing PB5c?

• LS21a opens, de-energizing CR6, CR4 & C1 and stop pump 1

• CR4 energizes, SV1 operate, C1 energizes and pump 1 start

• CR9 energizes, SV1 operate, C1 energizes and pump 1 start

• CR1 energizes, SV1 operate, C1 energizes and pump 1 start

Refer to the schematic diagram of sequential control simulator. The sequence is started, what happen when tank 2 reaches HI level?

• LS21a opens, de-energizing CR6, CR4 & C1 and stop pump 1

• CR4 energizes, SV1 operate, C1 energizes and pump 1 start

• TS2 opens, CR8 de-energizes, then CR9 & C2 energize and pump 2 start

• CHTR energizes and heats the product in tank 2

Refer to the schematic diagram of sequential control simulator .The sequence is started, what happen when timer TDE1 energized?

• LS21a opens, de-energizing CR6, CR4 & C1 and stop pump 1

• CR4 energizes, SV1 operate, C1 energizes and pump 1 start

• CHTR energizes and heats the product in tank 2

• TS2 opens, CR8 de-energizes, then CR9 & C2 energize and pump 2 start

Refer to the schematic diagram of sequential control simulator. The sequence is started, what happen when the product heated?

• LS21a opens, de-energizing CR6, CR4 & C1 and stop pump 1

• CR4 energizes, SV1 operate, C1 energizes and pump 1 start

• CHTR energizes and heats the product in tank 2

• TS2 opens, CR8 de-energizes, then CR9 & C2 energize and pump 2 start

Refer to the schematic diagram of sequential control simulator, what is the function of LS31a?

• To stop pump 1

• To start pump 2

• To stop pump 2

• To stop pump 3

In the sequenced control simulator, when the system will give abnormal alarms during the process?

• Presser Switch (PS )activated

• Solenoid valve control the product

• The product transferred to other tank

• Shut down

In the sequenced control simulator, when the system will give abnormal alarms during the process?

• Solenoid valve control the product

• The product transferred to other tank

• Shut down

• LO-LO level activated

In the sequenced control simulator, when the system will give abnormal alarms during the process?

• HI-HI level activated

• Solenoid valve control the product

• The product transferred to other tank

• Shut down

What is fitted in the system as safety devices that will shut down the process in case of pump overpressure?

• Emergency shutdown switch

• Overload trip

• Fuses one circuit

• Magnetic contactor