Bihar SBTE Polytechnic Diploma Civil 3rd SEM Dec 2019 Paper on Enamel Technology
| Sr. No. | Questions with options |
| 1 | Glass lined steel is
(a) Glassware (b) Pottery ware (c) Enamel ware (d) PCB |
| 2 | Frit used in enamel is
(a) 30% (b) 50% (c) 80% (d) 100% |
| 3 | Chemical attack is in affective on
(a) Wood (b) Paper (c) Grass (d) Enamel |
| 4 | Most important characteristic of enamel ware is resistant to
(a) Corrosion (b) 1600 degree Celsius (c) Mechanical abuses (d) None of these |
| 5 | Enamel is applied on
(a) Wood (b) Plastic (c) Steel (d) Pottery |
| 6 | Enamel is
(a) Porous (b) Impervious (c) Crystalline (d) Cryprocrystalline |
| 7 | Second coat on enamel ware is
(a) Cover coat (b) Ground coat (c) Alkali wash (d) Acid wash |
| 8 | Enamel is fired usually
(a) 1000 – 1100 degree Celsius (b) 750 – 850 degree Celsius (c) 100 degree Celsius (d) 400 degree Celsius |
| 9 | Enamel is
(a) Organic point (b) Glass (c) Plastic (d) Hardered pottery |
| 10 | Cobalt oxide is used in
(a) 2nd cover coat (b) First cover coat (c) Ground coat (d) All coats |
| 11 | Aging of Enamel slip is done for the time
(a) 48 hours (b) 24 hours (c) 10 hours (d) 5 hours |
| 12 | Most enamel frit is made at temperature
(a) 500 – 600 degree Celsius (b) 1150 – 1300 degree Celsius (c) 1500 degree Celsius (d) Blow 500 degree Celsius |
| 13 | For keeping enamel slip in suspension the material used is
(a) Deflocculant (b) Flocculant (c) Opacifier (d) Refractory |
| 14 | Enamel frit almost passes through
(a) 50 mesh (b) 100 mesh (c) 150 mesh (d) 200 mesh |
| 15 | Process adopted for steel plate cleaning for enamelling is
(a) Water washing (b) Alkali washing (c) Cloth rubbing (d) Pickling |
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| 16 | Enamel frit is made in
(a) Smelter (b) Tank furnace (c) Electric are furnace (d) Muffle furnace |
| 17 | Drying of enameled wares are done at
(a) 500 degree Celsius (b) 100 degree Celsius (c) 800 degree Celsius (d) 300 degree Celsius |
| 18 | Spraying method of enamel application is carried out on
(a) Cold steel plate only (b) Hot steel plate only (c) On both cold and hot steel plate (d) None of these |
| 19 | Firing of enameled ware is done in
(a) Down chaft kiln (b) Updraft kiln (c) Muffle kiln (d) Any kiln |
| 20 | Index of refraction for enamel glass is
(a) 1.5 (b) 2.7 (c) 2.1 (d) 1.0 |
| Data Collected By – Rashmi | |
| Published On – 9th June 2022 | |
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