The conditions necessary for combustion are the presence of combustible mixture and some means of initiating the process.

The following question has three statements. Study the question and the statements and decide which of the statement(s) is necessary to answer the question. 6 litres of mixture A and 4 litres of mixture B are mixed to form a new mixture C. Find the amount of water in the new mixture. I) The new mixture had alcohol and water in the ratio 7 ∶ 5. II) Mixture A had alcohol and water in the ratio 5 ∶ 4. III) Mixture B had alcohol and water in the ratio 5 ∶ 3.

A

Either I or II and III

B

Either III or I

C

Either III or I and II

D

Any two

E

All three

oil and kerosene are present in ratio of 5 : 7 in a liquid. Few litres of mixture of mixture are replaced with petrol. Ratio of oil : kerosene: petrol is 35 : 49 : 18 respectively. Amount of oil removed from mixture is 21 litres less than that of petrol added to the mixture. And amount of oil removed is 6 litres less than that of difference mentioned. Petrol is replacing the mixture removed hence; quantity of mixture is not changing. What is the difference between quantity of kerosene in old mixture and amount of oil in new mixture?

A

53 litres

B

31 litres

C

49 litres

D

30 litres

E

27 litres

Biomass gasification is considered to be one of the sustainable solutions to the power crisis in India, In this context, which of the following statements is/are correct? 1. Coconut shells, groundnut shells and rice husk can be used in biomass gasification. 2. The combustible gases generated from biomass gasification consist of hydrogen and carbon dioxide only. 3. The combustible gases generated from biomass gasification can be used for direct heat generation but not in internal combustion engines. Select the correct answer using the codes given below:

A

1 only

B

2 and 3 only

C

1 and 3 only

D

1, 2 and 3

Consider the following statements: Combustion chamber is 1. the volume between TDC and BDC during the combustion process 2. the space enclosed between the upper part of the cylinder and the top of the piston during the combustion process 3. the space enclosed between TDC and the top of the piston during the combustion process Which of the above statements is/are CORRECT?

A

1 only

B

2 only

C

3 only

D

1, 2 and 3

In a mixture, there is 63 litres of water and 77 litres of milk. Some quantity of mixture is taken out. After that 16 litres of water and 4 litres of milk are added in to the mixture, so that quantity of water and milk are same in the mixture. Find the total quantity of mixture when some amount of mixture taken out.

A

90 litres

B

130 litres

C

120 litres

D

100 litres

E

110 litres

Mixture A and Mixture B contain consist of 40 liters and 60 liters of mixtures of liquids X and Y in different proportions. Quantity of liquid X in mixture A is 10 liter less than the quantity of liquid X in mixture B. The total quantity of liquid Y in both the mixtures is 40 liters. If 30% of liquid is taken from mixture A and put into mixture B, then what will be the ratio of liquid X to liquid Y in mixture B?

A

59 : 85

B

85 : 59

C

61 : 83

D

83 : 61

In the following passage, some of the words have been left out. Read the passage carefully and select the correct answer for the given blank out of the four alternatives. A century later, the philosophy community needs to take __________ the new challenge of moral deliberation on the most pressing issues of our difficult times. We have to revoke the suspension of ethics and morality ____________ our lives by initiating a dialogue on it. Foregrounding ethics, however, ___________ means undermining the epistemological or ontological questions that are inevitably there. One such beginning can be made by anchoring moral ________________ in fairness and justice —one founded on obligatory fairness towards the people and the planet, towards the earth and the environment, and above all justice towards one_________. ethics and morality ____________ our lives by initiating

A

form

B

of

C

for

D

from

In a mixture of ghee and dalda, the ratio of ghee to dalda is 5 : a. When 5 litres of ghee were added in the mixture then, the concentration of dalda becomes 50% but when 2 litres of dalda were added in the mixture then the concentration of ghee becomes 40%. Quantity I : ghee will be what part of the mixture when, 10 litres of ghee were added in the original mixture? Quantity II : Dalda will be what part of the mixture when 3 litres of dalda were added in the original mixture?

A

Quantity 1 > Quantity 2

B

Quantity 1 ≥ Quantity 2

C

Quantity 1 < Quantity 2

D

Quantity 1 ≤ Quantity 2

E

Quantity 1 = Quantity 2

Which of the following are essential for a good combustion chamber of turbojet engine? 1. It should allow complete combustion of fuel. 2. It should maintain sufficiently high temperature in the zone of combustion in addition to proper atomization of fuel thus leading to continuous combustion. 3. It should not have high rate of combustion. 4. The pressure drop should be as small as possible

A

1, 2 and 4 only

B

1, 2 and 3 only

C

1, 3 and 4 only

D

2, 3 and 4 only

What is the quantity of mixture A in the final mixture when mixed with mixture B in ratio 3 : 2. l. The mixture A is 25% more than the total quantity mixture of B ll. The total quantity of mixture B in the original mixture is 20 kg

A

If the data in statement l alone are sufficient to answer the question

B

If the data in statement ll alone are sufficient to answer the question

C

If the data in statement l alone and statement ll alone are sufficient to answer the question

D

If the data in both the statements together are not sufficient to answer the question

E

If the data in both the statement l and ll together are necessary to answer the question

The conditions necessary for combustion are the presence of combustible mixture and some means of initiating the process.

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