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WorksheetsReview Unit 7 part 2
Total questions: 45
Worksheet time: 11hrs 15mins
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
What will happen if a Hi pressure condition develops at a pump during sequence of operation?
The system continues run
The system will interrupt
The system Shut down
The system damage
When manually operating a pump it must never be run if there is a condition in the tank that shows……………………………..
LO-LO
HI-HI
Both LO-LO & HI-HI
Over presser
What should you do to Isolate the load and keep the control supply energized .this eliminate any outside voltage that may cause problems?
Reset all safety devices
Power to the motor
Power to the control circuit
Use Safety Clothing
What should you do to isolate the Power to motor and keep the control supply energized .this that may cause problems?
Reset all safety devices
eliminate any outside voltage
Power to the control circuit
Use Safety Clothing
What should you do to take resistance measurements in any part of the control circuit?
Energize only control circuit
De-energize control circuit
power to the load
Use Safety Clothing
When troubleshooting control circuits, what is personal protective equipment must wear?
Safety glasses
Safety shoes
Insolated gloves
PPE require to task
When troubleshooting control circuits, what is personal protective equipment must wear safety shoes and ____________
Safety glasses
Sun glasses
gloves
Face shield
For safety, always use............................................to touch energized equipment to determine abnormal temperature condition.
PPE require
The back of your hand
Vender manual
Work permit and tag out
What safety rules you will follow when troubleshooting motor control circuits?
Energize only the control circuit.
Energize only the power circuit.
De-energize only the control circuit.
De-energize only the control circuit.
What is the first step to identify a logical troubleshooting Sequence?
Understand normal circuit operation
Eliminate the problem
Locate the problem
Talk to the operator
When troubleshooting, why you talk to the operator?
Understand normal circuit operation
Eliminate the problem
Locate the problem quickly
Clear the problem
When troubleshooting, what should you do to knows the circuit and how to operate?
Understand normal circuit operation
Eliminate the problem
Locate the problem
Talk to the operator
What sequence of troubleshooting you must follow to identify the effect of the problem and its cause?
Understand normal circuit operation
Eliminate the problem
Locate the problem quickly
Logical sequence
Which troubleshooting technique you must how to circuit operates when there is no fault?
Understand normal circuit operation
Eliminate the problem
Locate the problem
Talk to the operator
Which troubleshooting technique that removes something that is definitely broken first?
Understand normal circuit operation
Eliminate the obvious
Locate the problem
Be observant
Which troubleshooting technique will often show you abnormal operation or trouble with the circuit?
Understand normal circuit operation
Eliminate the problem
Locate the problem
Be observant
Which troubleshooting technique will help you to find the discolored areas, noise and smell in the circuit?
Understand normal circuit operation
Eliminate the problem
Locate the problem
be observant
When troubleshooting technique, what is signs of abnormal operation or faults?
Overheating warm or discolored area
Short circuit
Ground faults
Electric shock
Which troubleshooting technique. Easy ways to locate the problem include using the avertible material?
Understand normal circuit operation
Eliminate the problem
Locate the problem
be observant
Which method makes the troubleshooting easier, by dividing the circuit?
Flow chart
be observant
vender manual
Half check test
Which troubleshooting technique means fixing the fault by replacing/repairing and making adjustments the defective part?
Understand normal circuit operation
Eliminate the problem
Clear the problem.
Locate the problem
Where you should check/inspect the tightness and fraying or other signs of heat damage?
Contacts
Conductors
Holding coil
Overload relay
What is visual inspection sign of heat damage conductor?
Overheating
Fraying
Arcing
Noise
Where you should check/inspect for burns, arcing splatters, or molten metal spurs?
Contacts
Conductors
Holding coil
Overload relay
What is visual inspection sign of contacts for burns?
Overheating
Fraying
Arcing splatters
Discolorations
What is visual inspection sign of contacts for burns?
Overheating
Fraying
Molten metal spurs
discolorations
What is visual inspection sign of overheating?
Fraying
Molten metal spurs
Discolorations
Tightness
What is Faulty Holding coil?
Fraying
Molten metal spurs
Discolorations
Leaks
What should you do if found a relays contacts burned and pitted or discolored?
Repair
Replaced
Check vendor manual
Talk the operator
The limit switch must be checked visually for __________________
The correct actuator operation
actuator mechanism
damage contacts and broken or discolored parts
overheating
The level switch must be checked visually for______________
The correct actuator operation
Actuator mechanism
damage contacts and broken or discolored parts
overheating
The temperature switch must be checked visually for _____________
The correct actuator operation
Actuator mechanism
damage contacts and broken or discolored parts
overheating
What is the basic senses you can use when troubleshooting?
Sight
hearing and touch
Sight, hearing and touch
touch
What is the mechanical problem which means there is a Jerkiness of the moving parts?
Discoloration
Fraying
misalignment
Overheating
Which possible cause If the fuse blown the link?
Open circuit
Overload
Ground and Short circuit
Hold coil
