LOT110.05 Objective Review

Match the following

• CURRENT TO PNEUMATIC CONVERTER

• 
• WHEN AN INPUT IS PRESENT THE OUTPUT WILL BE PRESENT AFTER A TIME DELAY.

• 
• AN OUTPUT WILL BE PRESENT ONLY WHEN THE INPUT IS NOT PRESENT.

• 
• INTEGRATED OR STAND-ALONE ISOLATOR FOR SEPARATING 1E SIGNALS FROM NON 1E SIGNALS.

• 
• AN OUTPUT WILL BE PRESENT ONLY WHEN ALL INPUTS ARE PRESENT.

• 

Answer explanation

Enabling Objective 1: Provided with the symbols used in logic and process control diagrams, RECOGNIZE and IDENTIFY each symbol.

Enabling Objective 2:

DESCRIBE the electrical function of each control and logic component used in the logic and process control diagrams.

Reference Drawings:

9-Z-40418, Standard Logic Symbols

9-Z-40419, Standard Logic Symbols

Match the following

• A DEVICE WHICH PRODUCES AN OUTPUT FOLLOWING A TIME DELAY WHICH IS EQUAL TO THE ANALOG INPUT

• 
• A DEVICE HAVING RETENTIVE MEMORY AND ACTUATION SIGNAL BLOCK LOGIC FUNCTIONS

• 
• A DEVICE WHICH PRODUCES AN OUTPUT FOLLOWING DEFINITE INTENTIONAL TIME DELAY AFTER RECEIVING AN INPUT

• 
• WHEN AN INPUT IS PRESENT THE OUTPUT WILL BE PRESENT AFTER A TIME DELAY

• 
• A DEVICE WHICH RETAINS THE CONDITION OF OUTPUT CORRESPONDING TO THE LAST ENERGIZED INPUT.

• 

Answer explanation

Enabling Objective 1: Provided with the symbols used in logic and process control diagrams, RECOGNIZE and IDENTIFY each symbol.

Enabling Objective 2:

DESCRIBE the electrical function of each control and logic component used in the logic and process control diagrams.

Reference Drawings:

8758D22 sht. 1

The process variable is normally (1) than the setpoint,

and the comparator (2) when the process variable reaches the setpoint.

• (1) greater

  (2) de-energizes

• 
• (1) less

  (2) energizes

• 
• (1) greater

  (2) energizes

• 
• (1) less

  (2) de-energizes

• 

Answer explanation

Enabling Objective 1: Provided with the symbols used in logic and process control diagrams, RECOGNIZE and IDENTIFY each symbol.

Enabling Objective 2:

DESCRIBE the electrical function of each control and logic component used in the logic and process control diagrams.

Reference Drawings:

5Z121Z50001 sht. 1

Match the following

• Underfrequency Relay

• 
• Electric Operated Valve (solenoid)

• 
• AC Circuit Breaker

• 
• Undervoltage Relay

• 

Answer explanation

Enabling Objective 1: Provided with the symbols used in logic and process control diagrams, RECOGNIZE and IDENTIFY each symbol.

Enabling Objective 2:

DESCRIBE the electrical function of each control and logic component used in the logic and process control diagrams.

Reference Drawings:

8758D22 sht. 1

Consider the excerpt from STP Precautions Limitations and Setpoints and the logic in the graphic.

What signal is required for RCP Seal Injection MOVs to close.

1. PB-204A less than 560 psig

2. PB-204A greater than 560 psig

3. Containment Isolation Phase A

• 1 OR 3

• 1 AND 3

• 2 OR 3

• 2 AND 3

Answer explanation

Objective 3: INTERPRET and USE the symbols and acronyms used in logic and process control diagrams.

Objective 4: Provided with the appropriate diagram, PREDICT circuit response to various input signals.