- UPSC Civil Service Exam Questions - Section 1
- UPSC Civil Service Exam Questions - Section 2
- UPSC Civil Service Exam Questions - Section 3
- UPSC Civil Service Exam Questions - Section 4
- UPSC Civil Service Exam Questions - Section 5
- UPSC Civil Service Exam Questions - Section 6
- UPSC Civil Service Exam Questions - Section 7
- UPSC Civil Service Exam Questions - Section 8
- UPSC Civil Service Exam Questions - Section 9
- UPSC Civil Service Exam Questions - Section 10
- UPSC Civil Service Exam Questions - Section 11
- UPSC Civil Service Exam Questions - Section 12
- UPSC Civil Service Exam Questions - Section 13
- UPSC Civil Service Exam Questions - Section 14
- UPSC Civil Service Exam Questions - Section 15
- UPSC Civil Service Exam Questions - Section 16
- UPSC Civil Service Exam Questions - Section 17
- UPSC Civil Service Exam Questions - Section 18
- UPSC Civil Service Exam Questions - Section 19
- UPSC Civil Service Exam Questions - Section 20
- UPSC Civil Service Exam Questions - Section 21
- UPSC Civil Service Exam Questions - Section 22
- UPSC Civil Service Exam Questions - Section 23
- UPSC Civil Service Exam Questions - Section 24
- UPSC Civil Service Exam Questions - Section 25
- UPSC Civil Service Exam Questions - Section 26
- UPSC Civil Service Exam Questions - Section 27


UPSC Civil Service Exam Questions - Engineering
Q1: Timber can be made reasonably fire-resistant byA
soaking it in Ammonium Sulphate
B
coating with Tar paint
C
pumping creosote oil into timber under high pressure
D
seasoning process
ANS:D - seasoning process Wood is highly combustible but not inflammable i.e, in favourable circumstances, any wood may burn to ash timber is not readily ignited except in small thickness. Timber above a particular thickness, about 12mm can't support self - sustained combustion and continuous to burn only when external heat help in supplied efficient fire retardant chemicals under heat help in the production of more charcoal and water vapour some of the chemical that can be used heat help in the production of more charcoal and water vapour. Some of the chemicals that can be used are ammonium phosphate, boric acid, borax, Zinc chloride, sodium arsenate, etc. These can be applied to get a penetration of 2.5 to 4.0 by pressure treatment or soaking. |


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