Podcast
Questions and Answers
What is the primary responsibility of a person fixing a fault, according to the basic philosophy of fault finding?
What is the primary responsibility of a person fixing a fault, according to the basic philosophy of fault finding?
- To document the fault and delegate responsibility to another technician.
- To immediately replace the faulty component without further analysis.
- To consider the fault and the problems arising from the existence of the fault. (correct)
- To only address the immediate fault without considering its secondary effects.
In the nine-point plan for fault finding, which step directly precedes taking corrective action?
In the nine-point plan for fault finding, which step directly precedes taking corrective action?
- Identifying the actual cause/problem.
- Archiving the results.
- Determining possible causes.
- Deciding on the best action to take. (correct)
What is the main purpose of preventative maintenance?
What is the main purpose of preventative maintenance?
- To repair machines after they have already broken down.
- To increase uptime by running machines at maximum capacity.
- To upgrade the outdated parts of a machine.
- To check the working condition of all machine components. (correct)
Which of the following best describes 'uptime'?
Which of the following best describes 'uptime'?
What characterizes 'downtime' in a system?
What characterizes 'downtime' in a system?
Which of the following is NOT a factor affecting the reliability of a system?
Which of the following is NOT a factor affecting the reliability of a system?
When collecting facts as part of the nine-point rule, what is one method to ensure success?
When collecting facts as part of the nine-point rule, what is one method to ensure success?
When determining 'what are the facts' during fault finding, which factor relates to how the fault's location influenced what happened?
When determining 'what are the facts' during fault finding, which factor relates to how the fault's location influenced what happened?
Which of the following questions is addressed by 'the time factor' when investigating a fault?
Which of the following questions is addressed by 'the time factor' when investigating a fault?
What aspect of a fault does 'the casual factor' primarily address?
What aspect of a fault does 'the casual factor' primarily address?
Which of the following is a useful aid for documenting the process of fault finding?
Which of the following is a useful aid for documenting the process of fault finding?
According to the ten basic rules of fault finding, what should one do if the existing circuit diagram is too complex?
According to the ten basic rules of fault finding, what should one do if the existing circuit diagram is too complex?
Which of the following is emphasized as part of the ten basic rules of fault finding?
Which of the following is emphasized as part of the ten basic rules of fault finding?
In fault finding, what is the correct approach toward facts?
In fault finding, what is the correct approach toward facts?
What should be done with the results obtained during fault finding?
What should be done with the results obtained during fault finding?
What is the primary function of deflection plates in an oscilloscope?
What is the primary function of deflection plates in an oscilloscope?
What is the main purpose of a luminous spot on an oscilloscope screen?
What is the main purpose of a luminous spot on an oscilloscope screen?
What is a limitation of using a moving-coil meter?
What is a limitation of using a moving-coil meter?
What is the primary function of dielectric materials?
What is the primary function of dielectric materials?
Which of the following is a factor that can influence the dielectric properties of a material?
Which of the following is a factor that can influence the dielectric properties of a material?
Flashcards
Fault Finding Philosophy
Fault Finding Philosophy
The person fixing a fault must consider the fault and problems arising from it.
Nine Point Plan
Nine Point Plan
A structured approach to fault finding, encompassing problem definition to archiving.
Preventative maintenance
Preventative maintenance
Service to check machine components are capable of working conditions.
Uptime
Uptime
Signup and view all the flashcards
Downtime
Downtime
Signup and view all the flashcards
Reliability Factors
Reliability Factors
Signup and view all the flashcards
Collecting Facts for the Nine Point Rule
Collecting Facts for the Nine Point Rule
Signup and view all the flashcards
Factors Influencing Facts
Factors Influencing Facts
Signup and view all the flashcards
Fault Finding Documentation
Fault Finding Documentation
Signup and view all the flashcards
Basic Rules of Fault Finding
Basic Rules of Fault Finding
Signup and view all the flashcards
Uses of Simple Inching Circuit
Uses of Simple Inching Circuit
Signup and view all the flashcards
Polarized Capacitor Types
Polarized Capacitor Types
Signup and view all the flashcards
Non-Polarized Capacitor Types
Non-Polarized Capacitor Types
Signup and view all the flashcards
Overload Protection Types
Overload Protection Types
Signup and view all the flashcards
Diode in AC Purpose
Diode in AC Purpose
Signup and view all the flashcards
Methods in Systematic Fault Finding
Methods in Systematic Fault Finding
Signup and view all the flashcards
Ammeter vs. Voltmeter
Ammeter vs. Voltmeter
Signup and view all the flashcards
Capacitor vs. Inductor
Capacitor vs. Inductor
Signup and view all the flashcards
Advantages of Metal Oxide Resistors
Advantages of Metal Oxide Resistors
Signup and view all the flashcards
Core Loss Types
Core Loss Types
Signup and view all the flashcards
Study Notes
- When a fault occurs, the person fixing it must consider the fault and related problems.
The Nine Point Plan for Fault Finding
- Determine what the problem is.
- Define the objective.
- Identify possible causes.
- Gather the facts.
- Determine the actual cause/problem.
- Identify possible steps to take.
- Decide on the best action to take.
- Take action.
- Archive the results.
Preventative Maintenance
- Service to check a machine's components' working condition.
Uptime
- Maximum use of equipment or system, working according to plan.
Downtime
- When system failure occurs and repairs are needed.
Factors Affecting Reliability
- Power dissipation.
- Mechanical stress.
- Environmental conditions.
- Temperature variations.
- Shock or vibration.
- Pressure radiation.
Methods for Collecting Facts (Nine Point Rule)
- Examine records.
- Determine applicable rules.
- Communicate with involved people.
Factors Influencing Decisions ("What are the Facts?")
- Situation factor: What happened and how.
- Human factor: Who was involved and influences the fault identification.
- Place factor: How the location impacts what happened.
- Time factor: When the fault occurred and its importance.
- Casual factor: Why the fault happened and if it's a recurring issue.
Aids for Fault Finding Documentation
- Functional block diagrams.
- Test data charts.
- Layout diagrams.
- Test flowcharts.
- Symptom analysis charts.
Ten Basic Rules of Fault Finding
- Understand basic component operation.
- Learn typical circuits.
- Know how to use equipment.
- Redraw complex circuits.
- Use a logical, systematic process to eliminate possible faults.
- Facts must be tested.
- Record results.
- Avoid indiscriminate adjustments.
- Test after completing repairs for proper operation.
Uses of a Simple Inching Circuit
- Accurate hoisting/lowering.
- Setting up machines.
- Positioning of work pieces.
Types of Polarized Capacitors
- Electrolytic capacitors.
- Tantalum capacitors.
Types of Non-Polarized Capacitors
- Ceramic.
- Paper dielectric.
- Silver-mica.
- Polystyrene.
- Polyester film.
- Paloycarbonate.
Two Types of Overload Protection
- Electromagnetic overload.
- Thermal overload.
Purpose of a Diode in AC Circuits
- Blocks DC circuits.
- Used as a rectifier.
Methods Used in Systematic Fault Finding
- Basic approach.
- Scientific approach.
- Half-cut method.
- Systematic approach.
Difference Between Ammeters and Voltmeters
- Ammeters have low resistance; voltmeters have high resistance.
Difference Between Capacitors and Inductors
- A capacitor stores electrical charge.
- An inductor produces a magnetic field.
Advantages of a Metal Oxide Resistor
- High stability.
- High power rating.
- High-temperature stability.
- Low noise level.
- Low production cost.
- Heat resistor accuracy.
Types of Core Losses
- Eddy current.
- Hysteresis.
- Iron core.
- Copper.
Deflection Plates of an Oscilloscope
- Plates inside that deflect the electron beam.
Purpose of a Luminous Spot
- Converts accelerated electrons into light to appear on the screen.
Disadvantage of a Moving-Coil Meter
- Measures only direct currents.
Functions of Dielectric Materials
- Supports electrical components.
- Used as a dielectric capacitor.
Factors That Influence Dielectric Properties
- Temperature.
- Moisture.
- Frequency.
- Field strength.
Decoupling Capacitor in a Transistor Circuit
- Shorts circuit spikes.
- Shorts AC voltage on the emitter to ground.
Three Types of Basic Amplifier Circuits
- Common collector: Current amplification.
- Common base: Voltage amplification.
- Common emitter: Current or Voltage amplification.
Holding Current in SCR
- Minimum current to keep an SCR in conduction.
Force Commutation
- Switching off an SCR to stop conduction.
Types of Moving Iron Instruments
- Attraction type.
- Repulsion type.
Three Operating Areas of a Transistor
- Cut-off region.
- Active region.
- Saturation region.
Three Methods to Cause an SCR to Conduct
- Positive gate current.
- Anode positive voltage.
- Transient on the gate.
De Morgan's First Theorem
- The AND of inverted inputs is equivalent to the OR function of inverted inputs.
De Morgan's Second Theorem
- The OR of inverted inputs is equivalent to the AND function of the inverted inputs.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
