true orre fabe Read the following statements and wriieit the

true orre fabe. Read the following statements and wriieit they are alse Read the following statements and write ks) (a) The maximum pressure in the idcal Otto eyele can e determined at the end of the maximum pressure in the ideal Otto cycle can be determined at the end of the (b) in the combined (e) in the Multistage compression refrigeration system, the refrigerant in the high-pressure l (d) Because ammonia is the low-cost refrigerand, it is commonly used as the working fluid in (e The cogencration plani produces both electricity and procds heat using energy fiom the compression process directly by the combustion chamber must be the same refrigerant ased in the low-pressure loop household refrigerators (b) In the combined gas-vapor power cycle, the heat gas-vapor power cycle, the heat energy for steam generation is providd heat using energy from the same thermal reservoir () The power output of a gas-turbine cycle and Rankine cycle can be incressed through the u of multistage expansion with rcheating. (g) In the Rankine cycle, lowering the condenser pressure results in a reduction in thermal efficiency of the cyele, and at the same time leads to an increase in moisture content of steam exiting the turbinc. (b) The ideal vapor-conipression re frigeration cyele consists of four processes: isentropic compression, constunt-pressure heat rejection, isentropic expansion, and constant-pressure heat addition (i) The deviation of actual gas-turbine cycles from the idcal cycles is a result of the pressure drop in the associated heal exchangers and the mechanical friction in the turhine and G) The coopression ratio of dicsel engine is defined by the eylinder velumes before and after the comhustion proecs (k) Spark plug is the key component for initiating the inteexal combustion in all types of () The COP of a cascade zefrigeration system is always grouter than the COP of a simple (un) The multipurpose refrigerauon syaten with a single compressor is commenly used to n) The vapor power cycles always iavolve the phase-change proceses of working fuid (ol ln dhe egeseative Rankine cyele, the open feedwater beater (F Wit serves as a mixings vapor compression cycle operating between the same pressure linits remove bcat from dhe relfigcrated spaces at more than one temperature. obrWhere the aloan extracted from the turbine directly mixes with the feedw ater fro he pso the combined fluid leaves as the saturatod liquid-vapor misture

Solution

a) true

b) false

c) true

d) false

e) false

f) true

g) true

h) false

i) true

j) false

k) false

l) false

m) true

n) true

o) true