Thickness of plastic layer
Caking index
Swelling index
Gray-king index
✅ The correct answer is option B.
Engineering
Boost your preparation with the latest Engineering MCQs with answers and explanations. Our collection covers civil engineering, electrical engineering, mechanical engineering, electronics, software engineering, and other core subjects. These multiple-choice questions are designed for students, competitive exam aspirants, and professionals preparing for NTS, PPSC, FPSC, CSS, PMS, PEC exams, university entry tests, and job interviews. Practice online with updated Engineering MCQs to strengthen concepts, improve technical knowledge, and perform better in exams and recruitment tests.
3252. Which of the following constituents of coal is the most important in the production of coke?
Moisture
Ash
Volatiles
Carbon
✅ The correct answer is option D.
3253. A travelling grate stoker is meant for the efficient burning of __________ coal.
Caking
Pulverised
Non-caking
High ash
✅ The correct answer is option C.
3254. Fossil fuels mean
Solid fuels
Liquid fuels
Those fuels which are found in the crust of earth
Premature fuels with low calorific value
✅ The correct answer is option C.
3255. Lurgi gasifier (high pressure gasifier) as compared to Kopper Totzek gasifier (atmospheric pressure gasifier) produces
Higher amount of methane
Lower amount of hydrogen
Both A & B
Higher amount of both methane and hydrogen
✅ The correct answer is option C.
3256. Overfire burning in a furnace is a phenomenon characterised by the
Supply of excess fuel
Supply of excess air
Burning of carbon monoxide and other incombustibles in upper zone of furnace by supplying more air
None of these
✅ The correct answer is option C.
3257. Tar dolomite bricks are used in the
basic Bessemer converter
basic open hearth furnace
electric furnaces
all (a), (b) and (c)
✅ The correct answer is option D.
3258. With decrease in porosity, the __________ of the refractories decreases.
strength
thermal conductivity
spalling resistance
none of these
✅ The correct answer is option C.
3259. Out of the following fuels, the difference between the net and gross calorific value is maximum in case of
Pitch
Fuel oil
Blast furnace gas
Bituminous coal
✅ The correct answer is option B.
3260. Water content in ground refractory material to be shaped into bricks by hand moulding is about __________ percent.
5
20
40
55
✅ The correct answer is option B.