IndiaBIX

Chemical Engineering - Refractory Technology

Exercise : Refractory Technology - Section 2
41.
Cold crushing strength of ordinary fireclay brick is about 950 kg/cm2 . On exposure to a temperature of about 1500°C, its crushing strength may come down to as low as __________ kg/cm2 .
450
250
150
65
Answer: Option
Explanation:
No answer description is available. Let's discuss.
42.
Zirconia refractory
does not react with basic slags.
is produced from baddeleyite.
can not be used as an insulator.
has poor electrical conductivity at high temperature.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
43.
Which one contains maximum percentage of Al2O3 ?
Firebrick
Sillimanite
Magnesite
Aluminous firebrick
Answer: Option
Explanation:
No answer description is available. Let's discuss.
44.
Which of the following does not occur during firing/burning of refractories ?
Removal of water of hydration.
Vitrification.
Decrease in crushing strength.
Development of stable mineral form.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
45.
Silicon carbide refractories are used in the
muffle furnace
zinc smelting furnace
ceramic recuperators
all (a), (b) and (c)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers