100-120
230-250
450-550
600-850
✅ 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.
2652. Octane number of 2, 2, 4 – trimethyl pen-tane is
0
100
In between 0 and 100
More than 100
✅ The correct answer is option B.
2653. The best method of determining sulphur in crude oil is by the __________ method.
Kjeldah
Duma
Bomb calorimeter
Junkar’s calorimeter
✅ The correct answer is option C.
2654. Quantity of coke oven gas produced by high temperature carbonisation of one ton of dry coal may be around __________ Nm³.
30
300
3000
30, 000
✅ The correct answer is option B.
2655. In low temperature carbonisation of coal, the
Yield of coke oven gas is 290 Nm³ /ton dry coal
Volatile matter in coke is zero
Temperature maintained is 700°C
Yield of tar is about 3% of dry coal
✅ The correct answer is option C.
2656. Which of the following is not increased by using preheated combustion air in place of ordinary air at room temperature?
Calorific value of the fuel
Flame temperature achieved
Speed of combustion of fuel
Heat transfer rate to the stock in the furnace
✅ The correct answer is option A.
2657. In petroleum refining, the process used for conversion of hydrocarbons to aromatics is
catalytic cracking
catalytic reforming
hydrotreating
alkylation
✅ The correct answer is option B.
2658. Which of the following fuels is the best for burning on chain grate stoker?
Non-caking coal
Caking coal
Coking coal
Pulverised coal
✅ The correct answer is option A.
2659. With increase in density, the viscosity of petroleum products
increases
decreases
remains same
either (a) or (b)
✅ The correct answer is option A.
2660. Name the hydrocarbon having the poorest oxidation stability.
naphthene
olefin
paraffin
aromatics
✅ The correct answer is option D.