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Ratio of chemical A and B in boiler Y is 3 : 2 and Boiler X has ratio of chemical A to chemical B as 1 : 7, 16 litres of mixture is removed transferred from boiler X to boiler Y. What is the total capacity of boiler Y if capacity of boiler X is 144 litres and difference between chemical A and B in boiler Y after transfer is 25 litres? Assume that after transferring 16 litres from boiler X, boiler Y is running at full capacity
In comparing the operation of the half-controlled 2-pulse circuit with that of the fully-controlled circuit, which of the following statements are evident? 1. Since half the thyristors are replaced by diodes, a half-controlled converter costs less than a fully-controlled converter. 2. Due to the freewheeling action with a half-controlled bridge-circuit power factor is improved in half-controlled converters. 3. The AC supply current is more distorted due to its zero periods with the half-controlled circuit, compared to a fully-controlled bridge circuit. Select the correct answer using the code given below :
In natural circulation boilers, water circulation takes place due to natural convection current produced by the application of heat.
In a shell and tube heat exchanger for a given heat transfer surface area, smaller diameter tubes are favoured as compared to larger diameter ones ; because the smaller diameter tubes
Which of the following statements regarding steam boilers are correct? 1. The boiler must be capable of quick starting and loading. 2. The boiler should have no joints exposed to flames. 3. The boiler must be capable of burning low ash content coal efficiently.
Read the following statement about boilers. I. Water tube boiler is capable of generating steam of pressure more than 50 kg/cm2 . II. Fire tube boiler is suitable for generating steam of pressure less than 17.5 kg/cm2 . III. Water tube boiler occupy comparatively less space.
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.
A boiler accessory that is used to put off the fire in the furnace of the boiler when the water level in the boiler falls below a safe level and prevent overheating of tubes
Natural water circulation, by convection in water tube boilers, with increase in pressure of boiler
In a vertical thermosyphon re-boiler, it is due to the __________ difference that the circulation in the liquid occurs, between vapour-liquid mixture from the re-boiler and the liquid through the down-comer to the re-boiler.