FDC - FIRE DEPARTMENT CONNECTION

? WHAT IS AN FDC AND HOW DOES IT WORK IN A FIRE PROTECTION SYSTEM?

An FDC (Fire Department Connection) is an external connection that allows the fire department to connect a fire hose and supplement the building's fire protection water supply during an emergency

AIR VELOCITY CALCULATION - HVAC

Air velocity is the speed at which air moves through a duct, grille, diffuser, or opening.

FORMULA:

V=Q÷A

Where:

V = Air velocity (m/s)

Q = Airflow (m³/s)

A = Cross-sectional area (m²)

Can you complete this equation without using a pen?

What is the value you found for x?

Electrical engineering

FLANGE ALIGNMENT & FLANGE TILT INSPECTION

| Piping QC

Proper flange alignment is an important part of achieving a reliable and leak-free piping joint.

During flange inspection, some of the key points, I focus on include:

Flange face alignment: Confirming the mating faces are properly aligned and suitable for assembly.

Bolt-hole alignment: Ensuring bolt holes line up

correctly and bolts can pass through without excessive force.

You are not allowed to use any pen or paper,

Can you solve it in 5 seconds....!!!!

Types of Expansion Joints in Piping Systems

Thermal expansion is an important consideration in piping design and QA/QC inspection. As temperature changes, piping systems experience thermal movement that can lead to stress, deformation, or excessive loads on connected equipment.

Common types of expansion arrangements include:

1. Thermal Expansion Loop - Absorbs thermal movement through the flexibility of the pipe.

2. Bellows Expansion Joint - Accommodates axial, lateral, and angular movement.

QWELD VISUAL INSPECTION (VT) - 60 POINTS CHECKLIST

A weld that looks good is not automatically an acceptable weld.

Effective Visual Inspection (VT) is a systematic process that starts before welding, continues during welding, and finishes with final verification and documentation.

◆ 1. BEFORE WELDING - PREPARATION

Before striking the arc, verify:

Latest approved drawing and applicable specification

Approved WPS is available and applicable to the joint

Welder qualification and identification are valid

Material grade, thickness and heat-number traceability

Comment Ur Answer ❓

SEWAGE TREATMENT -TECHNOLOGIES

Hydraulic Calculation for Fire Protection System

Hydraulic calculation is the backbone of a properly designed fire protection system. It verifies that the required flow and pressure reach the most hydraulically remote sprinkler while selecting a suitable fire pump.

Key Features:

Design flow calculation - Q = Area × Density

Hazen-Williams friction-loss calculation

Considers pipe length, diameter & fittings

Calculates Total Dynamic Head (TDH)

Fire pump flow & head selection

Checks required residual pressure at the remote sprinkler