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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:
Pavan and Sravan are two persons. If Pavan works with his actual efficiency and Sravan twice of his actual efficiency then it takes 25 days to complete the work. But If Pavan works twice of his actual efficiency and Sravan with his normal efficiency then the work is completed in 20 days. How many days would it take if Sravan alone works with his actual efficiency (in Days)?
State whether the following statement is true or false about electrolyte in ECM. “Machinability in ECM is enhanced, when electrolyte is heated.”
State whether the following statement is true or false regarding the limitations of ECM. “In ECM, cleaning and oiling of work piece need not be done after machining.”
State whether the following statement is true or false regarding the environmental impacts of ECM. “In ECM, accumulation of toxic compounds is due to nitrate reduction at tool cathode.”
Below stated are some of the statements about the Alternating current. You need to identify which of the following is incorrect, 1. DC power is far more powerful than AC power. The efficiency and power to size characteristics of DC motors and apparatuses are increased. Lighting by DC (LED) is 75% more efficient than lighting from incandescence. 2. A comparatively high voltage alternating current may be generated and easily raised and dropped by the static equipment known as the transformer, which makes electrical energy transmission and distribution economical, 3. Initial costs and maintenance of the AC motor are less expensive since it has no switch and is less powerful than the DC motor for constant working speed, hence it is desired to create power as alternating current. 4. The great efficiency of transmission in ac makes electric power generation cost-effective, Produced in huge quantities in one station and distributed throughout a vast area.
When an electric current coil of a wattmeter is connected to the electric current path R and the voltage coil is connected between the electric current R path and the neutral side of the balanced three phase supply, it shows 10 kW. The line voltage along the phase sequence RYB is 400 V. The current drawn by the current path is 54 A. What is the new reading of the wattmeter if the voltage coil is connected between the lines B and the Y paths, even if the electric current coil is continuously present in the line R?
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?
Efficiency of A is ¾ of the efficiency of B and efficiency of B is 80% of the efficiency of C. If A takes 120 days more than that of (B + C) working together to finish a work. In how many days; (A + B + C) can finish the whole work?
A and B can complete a work in 10 days and 15 days respectively. The efficiency of C is equal to the sum of efficiency of A and B. The efficiency of D is equal to the efficiency of A, B and C together. If A, B, C and D work together, they will complete the whole work in