A heat pump (H.P.) is driven by the work output of a heat engine (H.E.) as shown in the figure. The heat engine extracts 150 kJ of heat from the source at 1000 K. The heat pump absorbs heat from the ambient at 280 K and delivers heat to the room which is maintained at 300 K. Considering the combined system to be ideal, the total amount of heat delivered to the room together by the heat engine and heat pump is _______kJ (answer in integer).
![GATE ME 2024 Thermodynamics - Second Law of Thermodynamics Question 4 English](https://app-content.cdn.examgoal.net/fly/@width/image/6y3zli1lx71zg04/c707a276-103a-432b-a03a-b49c95afae93/00d1a840-261a-11ef-8bac-53b8a98dcde0/file-6y3zli1lx71zg05.png?format=png)
Consider an air-standard Brayton cycle with adiabatic compressor and turbine, and a regenerator, as shown in the figure. Air enters the compressor at 100 kPa and 300 K and exits the compressor at 600 kPa and 550 K. The air exits the combustion chamber at 1250 K and exits the adiabatic turbine at 100 kPa and 800 K. The exhaust air from the turbine is used to preheat the air in the regenerator. The exhaust air exits the regenerator (state 6) at 600 K. There is no pressure drop across the regenerator and the combustion chamber. Also, there is no heat loss from the regenerator to the surroundings. The ratio of specific heats at constant pressure and volume is $c_p/c_v$= 1.4. The thermal efficiency of the cycle is ________% (answer in integer).
![GATE ME 2024 Turbo Machinery - Turbo Machinery Question 1 English](https://app-content.cdn.examgoal.net/fly/@width/image/6y3zli1lx6snj91/f0616fec-2ec9-462e-ba61-db57e4008c06/8374a650-25f5-11ef-92df-019965141651/file-6y3zli1lx6snj92.png?format=png)
If ‘→’ denotes increasing order of intensity, then the meaning of the words
[smile → giggle → laugh] is analogous to [disapprove → _______ → chide].
Which one of the given options is appropriate to fill the blank?
Find the odd one out in the set: {19, 37, 21, 17, 23, 29, 31, 11}