---
title: "Glazing and its function"
subject: "Civil Engineering Materials"
chapter: 3
key: "semester_3/civil_engineering_materials:glazing-function"
source: https://www.bctengineer.com/q/semester_3/civil_engineering_materials/glazing-function
site: BCT Engineering
---

# Glazing and its function

Civil Engineering Materials · Chapter 3: Clay Products

- Asked in: 2076 Chaitra, 2 marks; 2078 Kartik, 1 marks; 2074 Asoj, 1 marks; 2081 Kartik (new course), 1 marks (asked 4 times)
- Answer checked by Claude Opus 5.5 (high effort) on 2026-10-14
- Page: https://www.bctengineer.com/q/semester_3/civil_engineering_materials/glazing-function
- Whole chapter: https://www.bctengineer.com/md/semester_3/civil_engineering_materials/chapter-3

## Question

Define glazing of ceramic/clay materials with its objectives (function).

## Short answer

Glazing is applying a thin glassy coating on ceramics and firing it to fuse, creating an impervious, glossy, hygienic surface that is easy to clean and increases strength and abrasion resistance.

## Answer

**Glazing** is the process of applying a thin glassy (vitreous) coating on the surface of ceramic or clay products and firing them so that the coating melts and fuses.

#### Objectives (functions)
- Makes the surface **impervious** to water and gases.
- Gives a smooth, **glossy and attractive** finish in various colours.
- Makes the surface easy to clean and hygienic.
- Increases strength and resistance to abrasion and chemicals.

Used on tiles, sanitary ware, pipes and pottery.

## Check yourself

The answer's key points as multiple-choice questions, with the correct option and why.

1. Glazing is:
   A. Applying a thin glassy coating and firing it so it fuses
   B. Painting with oil paint
   C. Cutting the surface
   D. Soaking in water
   Answer: A. The coating melts and fuses on firing. (Key point: Definition)

2. A major function of glazing is to make the surface:
   A. Porous
   B. Impervious to water and gases
   C. Rough
   D. Brittle
   Answer: B. Glaze seals the surface and makes it hygienic. (Key point: Impervious)

3. Glazing is used on:
   A. Concrete blocks
   B. Steel bars
   C. Tiles, sanitary ware, pipes and pottery
   D. Timber
   Answer: C. These ceramic products are glazed. (Key point: Use)

## Related in Civil Engineering Materials

- [Heat treatment, objectives, isothermal annealing](https://www.bctengineer.com/question.md?key=semester_3%2Fcivil_engineering_materials%3Aheat-treatment-isothermal-annealing-s) — Civil Engineering Materials, chapter 8
- [Preparation of clay for bricks](https://www.bctengineer.com/question.md?key=semester_3%2Fcivil_engineering_materials%3Aclay-preparation-for-bricks) — Civil Engineering Materials, chapter 3
- [Function of carbon in steel](https://www.bctengineer.com/question.md?key=semester_3%2Fcivil_engineering_materials%3Acarbon-function-in-steel) — Civil Engineering Materials, chapter 8, asked 2×
- [Function of varnishes](https://www.bctengineer.com/question.md?key=semester_3%2Fcivil_engineering_materials%3Afunction-of-varnish) — Civil Engineering Materials, chapter 9

## Related in other subjects

- [Cutting tool materials and carbon steels](https://www.bctengineer.com/question.md?key=semester_2%2Fworkshop_technology%3Acutting-tool-materials-carbon-steels) — Workshop Technology, chapter 7