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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
Water (CP = 4 kJ/kg K) is fed to a boiler at 30°C, the enthalpy of vaporization at atmospheric pressure in the boiler is 2400 kJ/kg; the steam coming from the boiler is 0.9 dry. What is the net heat supplied in the boiler?
Which of the following statements are correct regarding the Rankine cycle? For a given set of operating pressure limits of a Rankine cycle, superheating the steam beyond the saturation temperature at the boiler pressure will result in: a. an increase in the moisture content of steam leaving the turbine b. an increase in thermal efficiency of the Rankine cycle c. an increase in the mean temperature of heat addition d. a decrease in the amount of heat rejected in the condenser
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.
Which one of the following sets is incorrect to show the inter-relationships among price elasticity coefficient, change in price and change in total revenue ? Price elasticity coefficient Change in price Change in Total Revenue 1) Zero Increase Decrease Increase Decrease (2) Less than 1 Increase Decrease Decrease Increase (3) Equal to 1 Increase Decrease No change No change (4) More than 1 Increase Decrease Decrease Increase  
Which of the following statement(s) are true with respect to the concept of ‘EFFICIENCY’ as used in mainstream economics? 1. Efficiency occurs when no possible organization of production can make anyone better off without making someone else worse off. 2. An economy is clearly inefficient if it is inside the Production Possibility Frontier (PPF). 3. At a minimum, an efficient economy is on its Production Possibility Frontier (PPF). 4. The terms such as ‘Pareto Efficiency’, ‘Pareto Optimality’ and ‘Allocative Efficiency’ are all essentially one and the same which denote ‘efficiency in resource allocation’. Select the correct answer using the code given below:
Tap A can fill 1/4th of tank in D hours and the remaining tank can be filled by tap B in (D + 16) hours. A is 40% more efficient than B. Both the taps are opened to fill the tank, but A was working with 2/7th of its efficiency and B was working with 2/5th of its efficiency, after few hours, they started working with their full efficiency, and remaining tank is filled in 10 hours. Find the time for which taps didn’t work with their full efficiency?
The size of a boiler drum in pulverized fuel fired boiler, as its size and capacity, (steam pressure and flow ratings) increase
According to Griffith theory, which of the following are true for the fracture stress in a brittle material?
P. Increases with increasing surface energy
Q. Decreases with increasing elastic modulus
R. Decreases with increasing length of pre-existing crack
S. Decreases with increasing number of pre-existing cracks of same size
Which one of the following animals front teeth keep on growing throughout its life? It has to keep gnawing on things to keep its teeth from becoming too long?