Industrial Power Systems and Safety Quiz

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Questions and Answers

What is the primary function of a PSU (Power Supply Unit) within the YANPET complex?

To distribute power at the same voltage level from the main substation to the operating units.

To act as a backup power source in case of complete power failures from the utility company.

To generate all the necessary electrical power for the entire complex.

To step down the voltage from the main 34.5KV substation to levels required by the operating unit equipment. (correct)

What is the main difference between 'UEC' and 'PSU' terminology in the YANPET complex?

PSU refers to the general term for any electrical building; UEC only refers to specific builds at YEP.

There is no difference; both terms are used interchangeably throughout all YANPET locations.

UEC handles only normal power, while PSU handles essential and normal power as a combined unit.

UEC is primarily used in the old YPT section, while PSU is common in the YEP section. (correct)

What generally is located in a PSU's Transformer Yard?

All transformers, including those for lighting, which are located centrally.

All essential transformers, with normal power transformers situated indoors within the air-conditioned building.

Just the SF6 Switches used to distribute power to the individual transformers within the yard.

Only the main power transformers, with lighting transformers located near their respective service areas. (correct)

In YPT, where is the power transferred to from the 34.5 KV Sub-station, before going to the power transformers?

It goes directly to the transformers through two or more sets of normal power cables. Signup and view all the answers

What is the purpose of the SF6 Switches in a YEP PSU?

To distribute the 34.5 KV power supply to each power transformer in the yard. Signup and view all the answers

How is the essential power transferred to the PSU transformer yard?

Via one set of power cables at the 5kv level to an essential transformer in the yard. Signup and view all the answers

Besides the transformers, what is another major component located within the PSU or UEC?

An air-conditioned building, which houses other equipment and controls. Signup and view all the answers

Which of the following is NOT mentioned as a potential hazard associated with hand and power tools?

Insufficient Power Signup and view all the answers

What is the primary purpose of using hand and power tools in various industries?

To perform tasks that would be difficult or impossible otherwise Signup and view all the answers

What is the starting page number for the section titled 'Basic Safety Rules for Tools'?

28 Signup and view all the answers

Which of the following is NOT considered a 'Basic Safety Rule' when working with hand and power tools?

Ensure proper ventilation in the workspace Signup and view all the answers

What is the primary objective of studying 'Hand and Power Tools' in an industrial context?

To gain a basic understanding of hand and power tools and their use in industry. Signup and view all the answers

The table of contents indicates that 'Basic Manual Hand Tools Best Practices' are discussed on which page?

32 Signup and view all the answers

Based on the text, is the statement 'All hand and power tools are inherently dangerous' accurate?

False Signup and view all the answers

What is implied by the statement 'These tools help us to easily perform tasks that otherwise would be difficult or impossible'?

These tools are designed to simplify complex tasks Signup and view all the answers

Where is the definition of 'Hand and Power Tools' mentioned in the content provided?

Definitions section Signup and view all the answers

What is the starting page for the section dedicated to 'Basic Power Hand Tools Best Practices'?

34 Signup and view all the answers

Where is a P.S.U/U.E.C typically located within a plant?

At the edge of the battery limit or nearest to the serviced equipment. Signup and view all the answers

In what type of area are all U.E.C's located?

Non-classified areas. Signup and view all the answers

What does the term 'battery limit' refer to in relation to U.E.C location?

The designated perimeter of a process unit within a plant. Signup and view all the answers

If a plant has multiple polyethylene units, how many U.E.C's would you expect to see?

One U.E.C per polyethylene unit, determined by the size of the plant. Signup and view all the answers

According to the list, which unit is associated with UEC-2001?

Ethylene-Glycol Signup and view all the answers

How many U.E.C's are located in the Polyethylene unit (U30)?

Four Signup and view all the answers

Which of the following locations is NOT associated with an offsite U.E.C according to the provided list?

U30 Signup and view all the answers

If a U.E.C located in the Ethylene unit requires maintenance, where is the U.E.C located?

U10 Signup and view all the answers

What is the primary factor determining the total number of U.E.C's in a plant?

The size and complexity of the plant. Signup and view all the answers

What is the primary purpose of a strap pipe wrench?

To provide a grip on the pipe without causing scratches Signup and view all the answers

What material is commonly used in the head of a sledgehammer?

High-carbon steel Signup and view all the answers

Which type of hammer is primarily designed to avoid damaging softer materials?

Soft-faced hammer Signup and view all the answers

What is a defining feature of a strap pipe wrench?

It utilizes a leather or canvas strap for gripping Signup and view all the answers

What is the weight range of a typical sledgehammer?

2 to 20 pounds Signup and view all the answers

Why should you avoid carrying a tool by the cord or hose?

It can lead to accidents by tripping. Signup and view all the answers

What is the purpose of a Ground Fault Circuit Interrupter (GFCI) when using portable power tools?

To protect against electrical shocks. Signup and view all the answers

Which of the following should you do before removing a defective tool from use?

Tag it with 'Do Not Use'. Signup and view all the answers

What should be done to maintain tools for optimal performance?

Keep them sharp and clean. Signup and view all the answers

What type of clothing is recommended when working around machinery?

Non-tangled clothing free from loose ends. Signup and view all the answers

When using power tools, what is important to remember regarding your footing?

Maintain good footing and balance. Signup and view all the answers

What materials are commonly used in the construction of toolboxes?

Steel, wood, or plastic. Signup and view all the answers

What type of tools are most likely to be found in a chest-type toolbox?

Larger specialized tools. Signup and view all the answers

How should you disconnect a cord or hose from its receptacle?

Pull it gently without twisting. Signup and view all the answers

What is a key reason for keeping cords and hoses away from certain materials?

To avoid wear and damage. Signup and view all the answers

What is the purpose of the separate copper ground busses in the RIE?

All of the above. Signup and view all the answers

How are the DC power supplies protected to ensure fault isolation?

By using properly coordinated protection that isolates faults to specific loads or branches. Signup and view all the answers

Which of the following is a key feature of the redundant DC power supply configuration?

It ensures that the load will continue to be supplied if one power supply fails. Signup and view all the answers

What is the purpose of the transformer mentioned in the text?

To distribute utility power to the lighting and convenience outlets. Signup and view all the answers

What is the purpose of the signal ground bus in the RIE?

To provide a dedicated ground for signal references and cable screens including incoming field cable screens. Signup and view all the answers

Which of the following is NOT a factor contributing to the increased danger of low-frequency AC compared to DC?

Low-frequency AC has a higher voltage and amperage. Signup and view all the answers

What is the primary reason why DC is used in defibrillators?

DC is more effective at halting fibrillation in the heart. Signup and view all the answers

Based on the provided information, what is the approximate body resistance of a female with wet skin?

0.5 M Ohms Signup and view all the answers

Which of the following is a TRUE statement about the danger of AC and DC currents?

DC current is generally considered safer than AC current due to its non-alternating nature. Signup and view all the answers

Which of the following factors does NOT directly contribute to the severity of electrical burns?

The type of material the current passes through. Signup and view all the answers

What is the primary reason why low-frequency AC is more likely to cause muscle tetany than DC?

Low-frequency AC currents cause sustained muscle contractions. Signup and view all the answers

What is the main difference between the effects of low-frequency AC and DC currents on the heart?

AC currents are more likely to cause fibrillation, while DC currents are more likely to stop the heart completely. Signup and view all the answers

Why is the risk of electrical shock greater when a person has wet skin?

Wet skin reduces the body's resistance to electricity. Signup and view all the answers

What is important to remember regarding your footing when using power tools?

Always stand on a flat, solid surface Signup and view all the answers

What is the primary advantage of using wire rope slings over fiber line slings?

Wire rope slings offer greater strength. Signup and view all the answers

For which application are chain slings most appropriately used?

Hoisting heavy steel items and hot loads. Signup and view all the answers

What is a notable disadvantage of fiber line slings compared to wire rope or chain slings?

They are more likely to experience damage from sharp edges. Signup and view all the answers

What is the main function of hooks and shackles in hoisting operations?

To provide a way to move loads without tying directly to the object. Signup and view all the answers

What material are screwdrivers typically made of?

Steel that is hardened and tempered. Signup and view all the answers

Which of the following statements about fiber line slings is accurate?

They offer better protection for finished materials. Signup and view all the answers

When are chain slings particularly recommended?

For hot loads and items with sharp edges. Signup and view all the answers

What should be done if a hook or shackle is found to have abnormalities such as cracks?

Stop using it and report the issue. Signup and view all the answers

What is the approximate current flow when a person with a resistance of 1000-ohms is exposed to a voltage of 120-volts?

0.12 amperes Signup and view all the answers

Which of the following statements regarding shock duration and its effects is correct?

Longer shock durations increase the likelihood of death. Signup and view all the answers

What is a significant risk factor that increases during an electric shock when a person cannot release their grip?

Extended shock duration Signup and view all the answers

What is the primary reason most fatalities from electric shock occur?

Ventricular fibrillation of the heart Signup and view all the answers

How does thermal heat generation relate to electric shock duration?

Heat production is directly proportional to the duration of the shock. Signup and view all the answers

What happens to the current needed to induce heart fibrillation as shock duration increases?

Less current is required over time. Signup and view all the answers

During what conditions is a person more likely to receive a fatal electric shock?

When perspiring and having low body resistance Signup and view all the answers

What is the average current level at which a person is likely to experience ventricular fibrillation?

120 mA Signup and view all the answers

Which of the following factors influences the perception of electric shock?

Current Signup and view all the answers

What is the approximate threshold of perception for DC current entering the hand?

5 to 10 mA Signup and view all the answers

Above what frequency does shock perception tend to disappear?

15-20 kHz Signup and view all the answers

What is the primary danger associated with electric shock, besides the psychological effects?

Burns Signup and view all the answers

What is the term used to describe a fatal electric shock?

Electrocution Signup and view all the answers

What is the minimum current that can seize the heart muscle?

80 mA Signup and view all the answers

Which of the following is NOT a psychological effect of electric shock?

Muscle contractions Signup and view all the answers

What is the primary reason why electricity at any voltage can be dangerous?

It can cause sufficient current flow to affect muscles and nerves Signup and view all the answers

Study Notes

Jadeer Learning Manual - Electrical Area 1

This manual is for Electrical Technicians, covering Basic Plant Electrical & Safety.
The document revision is 2024.01, with a next review date of October 1, 2027.
Key personnel involved in development and review are Marwan Owaidhah (Electrical Trainer), Ali Fallatah (Electrical Specialist), Bandar Al-Mesawi (Electrical Specialist), and Ahmed Haresi (Electrical Specialist).
The job area is Area 1.

UEC/PSU Layout and Functional Location

UEC/PSU stands for Unitized Electrical Center/Power Supply Unit.
The P.S.U is an electrical building receiving normal and essential power supply from a 34.5KV substation.
It receives normal and essential power supply to provide required voltages for designated units.
The layout contains a transformers yard and an air-conditioned building, the former housing transformers and the latter housing control and protection equipment.
Normal power cables originate from the 34.5 KV substation.
In YEP, essential power runs to the essential transformer yard components. This is different than the component in the YPT complex.

The manual includes topics like Introduction, Function of P.S.U., Layout of P.S.U., Location of P.S.U.
The PSU/UEC's in YPT have designated page numbers for different functions and locations.
There are pages dedicated to objectives related to the YANPET Electrical Substation.
There are pages dedicated to PSU/UEC functions and location in the YPT complex.

PSU Layout & Functional Location

Introduction provides a brief overview of PSU functions and location in YANPET complex.
The P.S.U. receives power both normal (utility company) and essential (essential generators) from the 34.5Kv substation.
The transformers yard handles normal power cables, originating from the substation to the individual yard components.
In YEP the essential power travels via a separate 5kv cable to an essential transformer within the yard.
The air-conditioned building houses critical control and protection equipment ensuring an orderly plant shutdown.

SIH/RIE Layout and Functional Location

This topic covers the layout and function of SIH/RIEs in the YANPET complex.
SIH/RIEs are prefabricated enclosures housing instrumentation and control systems, vital for orderly plant shutdown.
These enclosures are equipped with a dual power supply (for DCS, PLC, and TMR PLC systems). A dedicated DC supply for the emergency loads in the enclosure is also provided.
A DC/DC Converter system also provides power for relevant field loads, such as compressor panels.

Hand and Power Tools - Learning Objectives, Definitions, Safety Rules

The manual's focus is on learning objectives, definitions, and safety rules related to hand and power tools.
The different types of tools and their uses are explored and practical considerations in employing them are detailed.

Other Sections (from the provided text)

The remaining sections in the original study notes are restated, with no changes.

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Description

Test your knowledge on the functioning of Power Supply Units (PSU) within the YANPET complex and the safety rules associated with hand and power tools. This quiz covers terminology differences, components, and operational safety in industrial settings.