TasDia Network
TasDia Network

MCQs 1: ‘Spinel’, a refractory mineral is chemically represented as____________________?

MgAl2O4 MgAl2O3 MgSO4 MgAl2O3.2H2O
Answer Explanation

MCQs 2: With increase in the density of silica refractories, its_______________?

Resistance to slag attack increases Spalling resistance reduces Both A. and B. Neither A. nor B.
Answer Explanation

MCQs 3: Mixing of ground refractory material and water is done in a ______________ mill?

Pug Ball Tube Rod
Answer Explanation

MCQs 4: Silicon carbide refractories are used in the _____________?

Muffle furnace Zinc smelting furnace Ceramic recuperators All A., B. and C.
Answer Explanation

MCQs 5: Firing temperature of magnesite bricks is about _____________ °C?

800-1000 1000-1200 1600-1800 2400-2600
Answer Explanation

MCQs 6: Which of the following is not an acidic refractory?

Silica bricks Fireclay bricks Bauxite bricks Magnesia bricks
Answer Explanation

MCQs 7: Grog__________________?

Contains both alumina and silica Is crushed firebrick Is a non-plastic material All A., B. and C.
Answer Explanation

MCQs 8: Except _____________, all other refractories are bad conductors of electricity (i.e, have low electrical conductivity)?

Fireclay Carborundum Graphite Chromite
Answer Explanation

MCQs 9: Refractoriness of a typical silica brick corresponds to Segar cone number, ’32’, which is equivalent to a temperature of _____________ °C?

1380 1520 1710 1915
Answer Explanation

MCQs 10: With increase in the alumina content in firebricks, its fusion point (refractoriness) ?

Decreases linearly Remains unchanged Increases Decreases
Answer Explanation

MCQs 11: Insulating refractories should have_______________?

High porosity Low thermal conductivity Both A. and B. Neither A. not B.
Answer Explanation

MCQs 12: Which is the stable form of silica below 870°C ?

Tridymite Cristobalite Quartz None of these
Answer Explanation

MCQs 13: Which of the following is not a neutral refractory ?

Silicon carbide Magnesite Chromite Graphite
Answer Explanation

MCQs 14: Firing temperature is minimum (1250-1400 °C) for _______________ bricks?

Fireclay Direct bonded basic Silica Magnesite
Answer Explanation

MCQs 15: Electrical resistor bars are made of _______________?

Silicon carbide Alumina Zirconia Graphite
Answer Explanation

MCQs 16: Refractories are dried in the _______________?

Rotary kilns Tunnel kilns Sun None of these
Answer Explanation

MCQs 17: Which refractory must have controlled atmosphere (temperature and humidity) for its safe storage ?

Tar bonded dolomite bricks Fireclay bricks Mullite bricks Magnesite bricks
Answer Explanation

MCQs 18: An indication of degree of firing in silica brick is its____________________?

Specific gravity Fusion point RUL None of these
Answer Explanation

MCQs 19: Which is not an alumino-silicate refractory ?

Fireclay bricks Mullite bricks Tar dolomite bricks High alumina bricks
Answer Explanation

MCQs 20: Resistance to slag attack of a refractory _____________________?

Depends on the nature of slag & refractory Decreases at higher temperature Decreases, if defective joints & cracks exist in the refractory All A., B. and C.
Answer Explanation

Related Topics

About Us | Contact Us | Privacy Policy
ABOUT US
Category
Who We Are

TasDia Network, this platform not only provides you the best educational stuff but besides this, we are creating thousands of new ideas to making your signature and planning much more on a single platform.

© 2020-2023, TasDia Network

All rights of the publication are reserved by tasdia.com.