APPSC Ceramic Technology 15 March 2020 Question paper with Answers Key- APPSC conducted Lecturers in Government Polytechnic Colleges (Engineering and Non-Engineering) in A.P Technical Education Service exam on 15 March 2020 FN from 10.00 AM to 12.30 PM. Here we are providing some of the questions asked in APPSC Ceramic Technology Paper.
The enamels are refractory and have a viscous character when they are?
High in feldspar content
The use of must be avoided in any white ground coat?
Tin oxide and Titanium oxide
The enamels are difficult to smelt and fire if the?
Quartz content is high
In case ground coats, borax causes?
Short firing range
Which is used for pickling?
Acid proof Stoneware tank
The neutralizing solutions consists of?
Which oxide may not be present on the iron to be pickled?
The adhering property is improved by the addition of?
Which is used for making of jewellery enamel frits?
The blistering of enamels in the furnance atmosphere may be caused by the presence of?
APPSC Ceramic Technology 15 March 2020 Paper
The processs of Scaling is closely related to?
In ground coats, quartz causes?
Long firing range
The pyrometric cones have a?
Triangular base and defined dimension and size
Theoretically, the MgO Percentage in magnetise is?
In general, the fireclay refractories contains?
25-45 wt% of alumina
The bulk density of silicon carbide refractories is?
Less than 3.0 g/cc
The operation that promotes adherence is called?
Silica refractories are those materials that contain SiO2 that is?
Greater than 93%
In de-enameling by the alkalin solution method, the material used is?
The mill additions for enamels can be classified into …….. groups?
APPSC Ceramic Technology 15 March 2020 Questions and answers
Zircon is a silicate of Ziroconium, containing?
67% Zirconia and 33% silica
The specific gravity value of Zirconia refractory is?
The most common ceramic fiber system are?
Aluminia, Aluminia – Silica and Zirconia
The specific load maintained for the RUL test is?
The hydrogen reactions are …….. in nature?
The percentage of gypsum usually interground with clinker is?
Which refractory materials shows high RUL value, close to its PCE?
Which refractories has a wide gap between its RUL and PCE values?
The Oxidation of MgO-C refractory by gaseous components is mainly due to?
Oxygen and carbon dioxide
The lowest temperature of liquid formation for pure fireclay is approximately?
1587 degree C
APPSC Ceramic Technology 15 March 2020 paper with Key
The clinkers are ……….?
5 – 25 diameter nodules
Pure calcite contains…..?
100% calcium carbonates
The argillaceous material in manufacturing of portland cement is?
The fineness of the cement is determined with the help of the ……… test?
The final setting time for Portland cement should be about?
The soundness of the cement is the result of?
Which applications is not based on ionic conditions?
The soundness of the cement is determined with the help of?
Le chatelier apparatus
The oxide in the least percentage of a typical Portland cement is?
The grey colour of the ordinary Portland cement is generally due to the presence of?
APPSC Ceramic Technology Answers Key 15 March 2020
Which is not a secomdary fuel?
Which is not a fossil fuel found in the crust of earth?
Rotary Kilns are used for calcinations of?
Limestone and Dolomite
Which materials exhibits the Meissner effect?
Which materials is not a Pyroelectric crystal?
A super conducting material is a superconducting state is?
The spark plug insulators for automobiles are fabricated from?
………. Is not application of the ion conducting ceramics?
The materials that produce heat by combustion are termed as?
The degree of polarisability as a material is identified by the term?
Relative dielectric constant
APPSC Ceramic Technology 15 March 2020 Full Question Paper & Key