Civil war Day 4(Sep 18)-LSGD

Polished terracotta is also known as .....

• Porcelain
• Tile
• Stoneware
• Faience

Answer explanation

Polished terracotta is also known as Faience

The process in which a thin protective coating is applied on the surface an item by burning at high temperature

• Screeding

• Glazing

• Plastering

• Varnishing

Answer explanation

The process in which a thin protective coating is applied on the surface of an item by burning at high temperature is called Glazing

Percentage of clay in cermet

• 20%
• 60%
• 80%
• 40%

Answer explanation

percentage of clay in cermet is 80% clay, 20% metal

Tiles are burnt in

• Muffle furnace
• Rotary kiln
• Sialkot kiln
• None

Answer explanation

• Tiles are burnt in Sialkot kilns.

A refractory material containing a combination of clay and metal

• Refractories
• Earthenware
• Faience
• Cermet

Answer explanation

Cermet is a composite material made from ceramic (clay) and metallic materials.

When percentage of mica present in sand is high

• increase the strength of mortar
• decrease the strength of mortar
• no effect on mortar
• Slightly enhance the properties of mortar

Answer explanation

High mica content reduces bonding, hence decreases the strength of mortar.

Bulking of sand is caused due to

• surface moisture
• air voids
• viscosity
• clay content

Answer explanation

Bulking of sand occurs due to surface moisture forming a film around sand particles.

Aggregate used for making sound absorbing mortar is

• Pumice
• Cinders
• Quartz
• Both a and b

Answer explanation

Lightweight aggregates like pumice and cinders are used for sound absorbing mortars.

Sand passing through a screen with clear openings of 3.175 mm is known as

• Fine aggregate
• Fine sand
• Coarse sand
• Gravelly sand

Answer explanation

Sand passing 3.175 mm sieve is classified as coarse sand

Lime cement mortar is also known as

• Gauged mortar
• Compo mortar
• Both A and B
• None of these

Answer explanation

When lime is mixed with cement, the mortar is called Gauged or Compo mortar.