2314. The thermal efficiency of a steel slab reheating furnace (walking beam type) may be about __________ percent.
15
40
70
85
✅ The correct answer is option B.
2319. Functional depreciation of an equipment is the measure of decrease in its value due to its
ageing
wear and tear
obsolescence
breakdown or accident
✅ The correct answer is option C.
2324. Regenerators are installed in
Coke ovens
Open hearth furnace
Both A & B
Neither A nor B
✅ The correct answer is option C.
2328. __________ of depreciation calculation does not take into account the interest on investments.
Present worth method
Sinking fund method
Sum of the years-digits method
all (a), (b) and (c)
✅ The correct answer is option C.
2333. Regenerators as compared to recuperators for the same duty
Store smaller quantity of waste heat
Are lighter & compact
Involve higher initial cost
All of the above
✅ The correct answer is option C.
2262. Tunnel kilns are usually used for
Roasting of pyrites
Drying/tempering of refractories
Reheating of slabs
Melting of glass
✅ The correct answer is option B.
2267. Equipment installation cost in a chemical process plant ranges from __________ percent of the purchased equipment cost.
10 to 20
35 to 45
55 to 65
70 to 80
✅ The correct answer is option B.
2271. Fuel economy in furnaces can be achieved by
Using oxygen enriched combustion air
Preheating the combustion air
Reducing the heat loss through furnace openings & doors
All of the above
✅ The correct answer is option D.
2275. The inventory of raw materials included in the working capital is usually about __________ months supply of raw materials valued at delivery prices.
one
three
six
twelve
✅ The correct answer is option A.
2280. Thermal efficiency of furnaces can be improved by
Waste heat recovery from flue gas
Minimising heat losses from furnace walls
Maintaining proper draught
All of the above
✅ The correct answer is option D.