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Energy Engineering Mcqs

Q:

Which nuclear fuel is usually used in thermal nuclear reactor to create fission?

A) U²³? B) U²³?
C) U²³? D) U²³?
 
Answer & Explanation Answer: B) U²³?

Explanation: In a thermal nuclear reactor the fission induced by neutrons using a fuel isotope U²³? is one of the several isotopes used in nuclear power generation. Fuel isotopes which are capable of being fissioned by thermal neutrons are called fissile’s.

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258
Q:

How pressure in the furnace is maintained below atmospheric pressure in balanced draught system?

A) By forced draught fan B) By induced fan
C) Depends on the height of chimney D) By installing Natural draught
 
Answer & Explanation Answer: B) By induced fan

Explanation: In balanced draught system, a forced draught fan is installed near the boiler which helps in overcoming the resistance of fuel bed by supplying sufficient air for combustion. An induced draught fan is installed near the chimney base removes the flue gases coming from the furnace and maintains pressure in the furnace slightly below the atmospheric pressure.

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242
Q:

What is ‘n’ in the following solar intensity formula?
I = Isc {1 + 0.033cos (360n/365)}

A) Day of the year B) Month of the year
C) The year D) Week of the year
 
Answer & Explanation Answer: A) Day of the year

Explanation: The following ‘n’ denotes day of the year in the formula. Since the distance between sun and earth varies, extra-terrestrial flux also varies. Earth is closest to the sun in the summer and farthest away in the winter.

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225
Q:

What is the main source for the formation of wind?

A) Uneven land B) Sun
C) Vegetation D) Seasons
 
Answer & Explanation Answer: B) Sun

Explanation: Wind is free and renewable form of energy, which throughout history has been used to grind grain, power ships, and pump water. Wind is created when the sun unevenly heat the earth surface.

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213
Q:

Which is the recent difficulty added to the starting systems?

A) Fuel flow B) Gear transmissions
C) Electronic controls D) Fuel consumption
 
Answer & Explanation Answer: C) Electronic controls

Explanation: The recent difficulty added to the stating system is electronic controls in engines. Some electronic control machines may need some minimum number of revolutions at a minimum speed before energizing the fuel system.

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175
Q:

Which fuel is partially carbonized and is considered as a primary stage in coal formation?

A) Coal bitumen B) Anthracite
C) Peat D) Lignite
 
Answer & Explanation Answer: C) Peat

Explanation: Peat is partially carbonized and decomposed material formed mainly due the transformation of buried vegetation. It is considered as the primary stage in the formation of the coal. It is spongy substance with high moisture content (upto 80%). Hence it has to be dried before use. In dry form, it has a calorific value of about 14560 KJ/kg. It consists of 58% C; 6.3% H?; 30.8% O?; 0.9% N? and 4% ash.

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169
Q:

Which of the following element is readily available in the ordinary water?

A) Cesium B) Thorium
C) Deuterium D) Astatine
 
Answer & Explanation Answer: C) Deuterium

Explanation: Deuterium used in fusion reaction is readily available in ordinary water (Out of 6500 molecules). Deuterium is also known as heavy hydrogen. The nucleus of deuterium is called as deuteron, Contains one proton and one neutron.

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163
Q:

What accounts for the presence of water in the exhaust leaving as vapor?

A) Gross calorific value B) Flash point value
C) Ignition temperature value D) Net calorific value
 
Answer & Explanation Answer: A) Gross calorific value

Explanation: Gross heating value accounts for water in the exhaust leaving as vapor, and includes liquid water in the fuel prior to combustion. This value is important for fuels like wood and coal, which will usually contain some amount of water prior to burning.

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