CuriousTab
Search
CuriousTab
Home
Aptitude
Computer
C Programming
C# Programming
C++ Programming
Database
Java Programming
Networking
Engineering
Biochemical Engineering
Biochemistry
Biotechnology
Chemical Engineering
Civil Engineering
Computer Science
Digital Electronics
Electrical Engineering
Electronics
Electronics and Communication Engineering
Mechanical Engineering
Microbiology
Technical Drawing
GK
Current Affairs
General Knowledge
Reasoning
Data Interpretation
Logical Reasoning
Non Verbal Reasoning
Verbal Ability
Verbal Reasoning
Exams
AIEEE
Bank Exams
CAT
GATE
IIT JEE
TOEFL
Jobs
Analyst
Bank PO
Database Administrator
IT Trainer
Network Engineer
Project Manager
Software Architect
Discussion
Home
‣
Chemical Engineering
‣
Refractory Technology
Comments
Question
Spalling resistance of a refractory can not be increased by
Options
A. increasing its porosity.
B. using a coarser grog during its manufacture.
C. decreasing its thermal co-efficient of expansion.
D. making it denser.
Correct Answer
making it denser.
Refractory Technology problems
Search Results
1. Chromite refractories are
Options
A. acidic refractory.
B. neutral refractory.
C. basic refractory.
D. fired at a temperature of 600°C only.
Show Answer
Scratch Pad
Discuss
Correct Answer: neutral refractory.
2. 'Super refractories' are made from pure
Options
A. carbides
B. oxides
C. borides
D. nitrides
Show Answer
Scratch Pad
Discuss
Correct Answer: oxides
3. Fireclay refractories have
Options
A. low co-efficient of thermal expansion.
B. poor thermal spalling resistance.
C. tendency to expand unduly high during firing.
D. very high cost.
Show Answer
Scratch Pad
Discuss
Correct Answer: low co-efficient of thermal expansion.
4. Which of the following is not an acidic refractory?
Options
A. Silica bricks
B. Fireclay bricks
C. Bauxite bricks
D. Magnesia bricks
Show Answer
Scratch Pad
Discuss
Correct Answer: Magnesia bricks
5. Which is the most stable crystalline form of silica at room temperature?
Options
A. Quartz
B. Cristobalite
C. Tridymite
D. None of these
Show Answer
Scratch Pad
Discuss
Correct Answer: Quartz
6. Alumina-graphite bricks are used for lining the
Options
A. slide gate in teeming laddies.
B. continuous casting systems.
C. both (a) and (b).
D. neither (a) nor (b).
Show Answer
Scratch Pad
Discuss
Correct Answer: both (a) and (b).
7. Zirconia refractory
Options
A. does not react with basic slags.
B. is produced from baddeleyite.
C. can not be used as an insulator.
D. has poor electrical conductivity at high temperature.
Show Answer
Scratch Pad
Discuss
Correct Answer: is produced from baddeleyite.
8. With increasing alumina content, the fusion point of high alumina refractories
Options
A. increases.
B. decreases.
C. remains constant.
D. may increase or decrease ; depends on its alumina content.
Show Answer
Scratch Pad
Discuss
Correct Answer: increases.
9. Which of the following does not occur during firing/burning of refractories?
Options
A. Removal of water of hydration.
B. Vitrification.
C. Decrease in crushing strength.
D. Development of stable mineral form.
Show Answer
Scratch Pad
Discuss
Correct Answer: Decrease in crushing strength.
10. Cermets are
Options
A. composite material containing both ceramic & metallic constituents.
B. having high strength & resistance to high temperature.
C. used in space vehicles, missiles & nuclear energy plants.
D. all (a), (b) and (c).
Show Answer
Scratch Pad
Discuss
Correct Answer: all (a), (b) and (c).
Comments
There are no comments.
Enter a new Comment
Save
More in Chemical Engineering:
Chemical Engineering Basics
Chemical Engineering Plant Economics
Chemical Engineering Thermodynamics
Chemical Process
Chemical Reaction Engineering
Environmental Engineering
Fertiliser Technology
Fluid Mechanics
Fuels and Combustion
Furnace Technology
Heat Transfer
Mass Transfer
Materials and Construction
Mechanical Operations
Nuclear Power Engineering
Petroleum Refinery Engineering
Polymer Technology
Process Control and Instrumentation
Process Equipment and Plant Design
Refractory Technology
Stoichiometry