1. The mass of flue gas per kg of fuel is the ratio of the ?

mass of oxygen in 1 kg of flue gas to the mass of oxygen in 1 kg of fuel

mass of oxygen in 1 kg of fuel to the mass of oxygen in 1 kg of flue gas

mass of carbon in 1 kg of flue gas to the mass of carbon in 1 kg of fuel

mass of carbon in 1 kg of fuel to the mass of carbon in 1 kg of flue gas

Answer: mass of carbon in 1 kg of flue gas to the mass of carbon in 1 kg of fuel

Explanation:


2. Which of the following gas is mostly used in town for street and domestic lighting and heating ?

Producer gas

Coal gas

Mond gas

Coke oven gas

Answer: Coal gas

Explanation:


3. Which of the following is a reversible non-flow process ?

Isochoric process

Isobaric process

Hyperbolic process

all of these

Answer: all of these

Explanation:


4. The main cause for the irreversibility is ?

mechanical and fluid friction

unrestricted expansion

heat transfer with a finite temperature difference

all of the above

Answer: all of the above

Explanation:


5. The smallest quantity of a substance, which can exist by itself in a chemically recognizable form is known as ?

element

compound

atom

molecule

Answer: molecule

Explanation:


6. A process of heating crude oil to a high temperature under a very high pressure to increase the yield of lighter distillates, is known as ?

cracking

carbonisation

fractional distillation

full distillation

Answer: cracking

Explanation:


7. Producer gas is obtained by ?

partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast

carbonisation of bituminous coal

passing steam over incandescent coke

passing air and a large amount of steam over waste coal at about 650° C

Answer: partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast

Explanation:


8. Which of the following gas has the highest calorific value ?

Coal gas

Producer gas

Mond gas

Blast furnace gas

Answer: Coal gas

Explanation:


9. The total energy of a molecule is shared equally by the various degrees of freedom possessed by it. This law is known as ?

law of equipartition of energy

law of conservation of energy

law of degradation of energy

none of these

Answer: law of equipartition of energy

Explanation:


10. Reheating in a gas turbine ?

increases the thermal efficiency

increases the compressor work

increases the turbine work

decreases the thermal efficiency

Answer: increases the thermal efficiency

Explanation: