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The question below, there is a statement followed by two conclusions numbered I and II. You have to assume everything in the statement to be true. Then consider the 2 conclusion together and decide which of them follows beyond a reasonable doubt from the information given in the statement. Statement: High pressure boilers are hazardous pieces of equipment, which are strictly regulated with special laws. Conclusions: I. If not regulated, high pressure boilers will be easily available in the market II. High pressure boilers are rare.
Which type of boilers is preferred cost wise when the boilers are required to raise less than 30 tonnes of steam?
The color preferences of a group of girls were mapped and the results were as follows: 20 preferred pink, 16 preferred red and 14 preferred green. 5 preferred all the three colours. 9 of them chose Pink and Green. 7 of them chose Pink and Red. 8 of them chose Red and Green. How many girls chose only one colour?
Very high pressure boilers are usually __________ boilers.
A single pass shell and tube heat exchanger, consisting of a bundle of 100 tubes (inner diameter 25 mm and thickness 2 mm) is used for heating 28 kg/s of water from 25 degree Celsius to 75 degree Celsius with the help of a steam condensing at atmospheric pressure on the shell side with condensing heat transfer coefficient 5000 W/m2 degree. Make calculation for overall heat transfer coefficient based on the inner area. Take fouling factor on the water side to be 0.002 m2 degree/W per tube and neglect effect of fouling factor on the shell side and thermal resistance of the tube wall
A thin spherical shell of internal diameter d is subjected to an internal pressure p. If $${\sigma _{\text{t}}}$$ is the tensile stress for the shell material, then thickness of shell is equal to
Wages of the workers are normally, the proportionality derived from their efficiency. But the concept of efficiency of labour is itself vague such as amount of physical output, output per man hour or output per man shift. But output is not the function of man alone. There are other factors which affect the output. Which among the following is/are not the factor(s) that would affect the output directly?
1. Physical condition of work
2. Nature of machinery
3. Technical process
4. Quality of raw material
5. System of management
6. Role of fellow workers
7. Competitors in the market
Consider the following statements for fluidized bed boilers: 1. Fluidized bed boilers produce steam from fossil and waste fuels by using a technique called fluidized bed combustion. 2. Cyclone separators are gas cleaning devices that utilize the centrifugal force created by a spinning gas stream to separate particles from a gas. 3. In a pressurized fluidized bed boiler, the combustion process takes place in a pressurized environment resulting in a compact furnace and improved combustion efficiency. Which of the above statements are correct?
Water tube boilers are further classified into horizontal straight tube and bent tube boilers.
In case of a shell and tube heat exchanger, the minimum shell thickness for carbon steel (inclusive of corrosion allowance) depends on shell diameter and is in the range of __________ mm.