1. Service Water Freshwater System as Utility Piping

What is the source of service water (as Utility Piping), and where should it be taken from?

A) Seawater supply main
B) Upstream of all block valves within the unit battery limit
C) Downstream of all block valves
D) From the top of the header

Show Answer

Explanation: Service water should be taken from upstream of all block valves within the unit battery limit.

2. Service Water Header Usage

What equipment may the service water header supply cooling water to?

A) Pumps only
B) Compressors only
C) Pumps, compressors, or other equipment requiring small amounts of cooling water
D) Emergency showers only

Show Answer

Explanation: The service water header may supply cooling water to pumps, compressors, or other equipment requiring small amounts of cooling water.

3. Service Water Take-off Lines in Utility Piping

Where should take-off lines from the service water header preferably be taken?

A) From the top of the header
B) From the bottom of the header
C) At any location
D) Downstream of block valves

Show Answer

Explanation: Take-off lines from the service water header should preferably be taken from the bottom of the header.

4. Service Water Utility Piping Location

According to Utility System Practices, where should service water be piped?

A) Aboveground piping
B) Underground piping
C) Below utility stations at grade
D) To utility stations at grade only

Show Answer

Explanation: Service water should be piped to utility stations at grade only.

5. Service Water for Emergency Showers

What is the water source for emergency showers and eye-wash fountains?

A) Cooling water supply main
B) Service water header
C) Seawater supply main
D) Plant air header

Show Answer

Explanation: Emergency showers and eye-wash fountains will be supplied from the service water header.

6. Plant Air Supply

Where should the air supply for plant air enter the unit?

A) Inside the unit
B) From an outside source with a block valve at the unit battery limit
C) From the bottom of the unit
D) Through a cooling water system

Show Answer

Explanation: The air supply for plant air should enter the unit from an outside source with a block valve at the unit battery limit.

7. Instrument Air Supply

According to Utility System Practices, where should the instrument air supply enter the unit?

A) From inside the unit
B) Through a cooling water system
C) From an outside source with a block valve at the unit battery limit
D) At any location

Show Answer

Explanation: Unless otherwise specified, the instrument air supply should enter the unit from an outside source with a block valve at the unit battery limit.

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Recommended courses (Published on EPCLand)

1. Complete Course on Piping Engineering
2. Basics of Piping Engineering
3. Piping Layout Engineering
4. Piping Material Engineering 
5. Piping Stress Analysis
6. Material Requisitions 
7. Piping Material Specifications
8. Valve Material Specifications
9. Plant Design & Layouts-OISD 118
10. Isometric Management

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Don’t miss out the collection of 15+ articles on following topics:

• Basics of Oil and Gas Industry
• Valves
• Testing
• Tank
• Piping Bulk Items
• Pipe
• Metallurgy
• Piping Materials
• Layout
• Instrumentation
• Heat Exchanger
• Type of Contracts
• Codes and Standards
• ASTM Standards
• Articles on Piping Specialty Items

Video details of Complete Course on Piping Engineering

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• Codes & Standards of the Energy Sector
• Piping Material Engineering
• Piping Layout Engineering
• Stress Analysis

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