Mechanical kida

  SUBJECT :- POWER ENGINEERING & REFRIGERATION.           Sample question paper  . 1. Attempt any five of the following :                                              marks 10 (a)  List diagnostic tools used in fault finding of MPFI engines.  (b)  Define SEER & EER.  (C) state purpose of selective catalytic reduction (SCR).  (d)  Define Pressure Ratio in air compressor.  (e)  List at least six components of a jet engine. (f) list different liquid propellant used in rocket engines. (g) state four objectives of supercharging. 2. Attempt any Three of the following:                    Marks 12 (a)  draw actual indicator diagram for 4 Stroke Petrol engine. (b) draw a typical graph indicating changes in pollutants level ( Hc,Co2&...

  Type : high pressure ,water tube, forced circulation steam boiler. Working principle : - its principle of working is “ two pressure can be used to effect and interchange of heat energy”. Construction and working: - In the primary circuit, the steam at 100 bar is produced from distilled water. - This is generated steam is passed through a submerged heating coil, which is located in an evaporator drum. -The high pressure steam in this cool possesses Sufficient thermal potential ,due to which, a steam at 60 bar with the heat transfer rate of 10,000 KJ/ metre square-hr degree Celsius  is generated in the evaporation drum.  -The steam produce in the evaporator drum from impure water is further passed through the superheater and then supplied to the prime mover. -The high-pressure condensate formed in the submerged heating coil is circulated through a low pressure feed heater on its way to raise the feed water temperature to its saturation temperature. Therefore, only latent...

  Type :- High pressure, water tube, forced circulation steam boiler.  Working principle : It's principle of working is “when the gas velocity exceed sonic velocity, the heat is transferred from the gas at a much higher rate than rates achieved with sub-sonic flow. The advantage of this theory is taken to effect the large heat transfer from a smaller surface area in this boiler ”. Construction & working : - VELOX boiler makes use of pressurised combustion . - The gas turbine drives the axial flow compressor, which raises the incoming air from atmosphere pressure to furnace pressure.  - The combustion gases after heating the water and steam, flow through the gas turbine to the atmosphere . - The feed water after passing through the economiser is pumped by a water circulating pump to the tube evaporating section.  - Steam separated in steam separating section flow through the superheater and form superheater its move to prime mover. Advantage of VELOX boiler ...