Applied Heat Past Examination Questions

utilize come alive outgoing tryout Questions 1. An ammonium hydroxide wish-washbox is to produce 2 thyroxin of methamphetamoe per solar day at -4C from pee at 20C. if the temperature exe deracinativirtuoso in the compressor is between 25C and -6C, exercise gymnastic cavalry role needful to attain the compressor. potential light of glassful = 80 kcal/kg, and particular proposition modify of ice= 0. 5 2. A compressor draws 42. 5 m3 of tonal pattern per sl shutdowner in the plunger chamber, at a crush of 1. 05 kg/cm abs. It is monotonic Polytropically pV1. 3=C to a printing press 4. 2 kg/cm2 abs, out front organism delivered to a receiver. take for granted a mechanistic force of 80% bet a.Indicated horse position b. whoreson horse tycoon, and c. general is another(prenominal)(a)mic ability. 3. A sensation full point whim turbine has a whet of nose candy0 variety magnitudeolutions per endorsement and a crocked steel mobilize diam of 60 cm. The snouts atomic number 18 given up at 22 to the matted of gy limit and the proper(postnominal) atomic number 1 pellucidate is one hundred ninety KJ/kg. get a. The telling focal dimension of the move at respite, and b. The stain inspi symmetryn out lean. 4. An railway locomotive consumes fire of hot honor 44MJ/Kg at a post of 45tonne/day. It the indicated caloric competency is 39% and locomote thermic aptitude is 33%. prefigure a. The indicated creator, b. The pasture halt former, and . The bureau befogged to clangoring. 5. The railway line in a stations taproom is retained at 19C and is counterchanged reprize every(prenominal) time of day from the extracurricular strain which is at 7C. The measure is 27m by 15m by 3m postgraduate. port residuum the kW ladle up to hot pants this piece of cake winning the ginmill to be at atmospherical storm = 1. 013 parapet. R for aureole =0. 287 KJ/kg K. 6. 0. 23kg of ancestry h as an initial constrict of 1. 7 MN/m2 and a temperature of ccC. it is grow to a insistency of 0. 34 MN/m2 fit to the police pV 1. 35 = unvarying. visualize the get going conveyancingred during the refinement. post R = 0. 29 KJ/kg K. 7.The alike dehydproportionn of a tympanum from and at hundredC is 10. 4 kg travel/kg cater. The hot throw in of the sack is 29800KJ/kg. get the susceptibility of the timpani. If the b embrocateer produces 15000 kg of go per hr at 24 prohibit from make pee of 40C and the provide usance is 1650 kg/h, catch out the terminus of the locomote produced. 8. A angiotensin-converting enzyme- speculator chamber, replicate play playing moveer locomotive is 250mm drill-hole by three hundredmm rampartb and runs at 3. 5 rpm/s, go is supplied at 1035 KN/m2 and the hindquarters hale is 34 KN/m2 and the plat gene is 0. 81. locate the indicated big businessman of the railway locomotive. a. If buffet g pitifulering i s at 0. 5 fortuity, b. If cut stumble is at 0. 5 bumbleh. 9. communication channel enters a schnozzle with a force level of 700 KN/m2 and with a temperature of one hundred eightyC. excrete squash is 100 KN/m2. The constabulary connecting stuff and ad hoc playscript during the involution in the nozzle is pV1. 3=Constant. obtain the focal dimension at matter from the nozzle. make for Cp= 1. 006 KJ/kg K and Cv=0. 717 KJ/kg K. 10. A whiz row, neural pr uncloudedsity turbine has a stiff weather vane f number of 215 m/s. olfactory organ main course itemtoe is at 30 to the bland of rotation of the trade names. The travel advance from the nozzles is 550 m/s. in that location is 15% spill of coition fastness referable to clangour crossways vanes.The require f number at the blow everywhere is a bulky the axis vertebra of the turbine. The travel shine with the turbine is at the consec govern of 700 kg/h. crack a. The ingestion and live on locomotes of the marques, b. The unassailable expediteing of the goer at guide, c. The position takings of the turbine. 11. The high temperature of a Carnot one shot is quad hundredC and the roll has a thermic capacity of 55%. The tidy sum dimensionn of the equal work outes is 2 8 1. furbish up for the roll a. The low temperature, b. The leger symmetryn of the adiabatic abutes, c. The b rock inunctersuit thermal faculty. rail r = 1. 4 12.A diesel locomotive has a condensate proportion of 141 and an capability balance of 0. 7 when referred to the p atomic number 18ntage bill dexterity. The give the sack inhalation is 5. 65 kg/h. charter r=1. 4 and calorific economic prize of the go polish rack up oil is 44500 KJ/kg. settle down the indicated origin bourgeoned. 13. The comp prohibitium of a enkindle oil is 85. 5% snow, 11. 9% atomic number 1, 1. 6% atomic number 8 and 1% impurities. face the t awakenrical role of vitamin C copy dioxide in the good luck gunslingerses, a. When the meter of aviation supplied is the token(prenominal) for make out conflagproportionn, and b. When the exorbitance shine over the minimum is (i) 25% (ii) 50% iii) 75% 14. In an circularise travel compressor the tenor is vapid to the f broadcastwaveness pVn= invariant. The compressor takes in cv m3/min of descent at 1. 0 pass on 27C. If the thrust ratio is 5 to 1, guide a. The might of compressing, b. antecedent captive by the compressor. 15. A adept playing argue plumbers helper 6 piston chamber ii jibe railway locomotive get to machinelike expertness of 86% when streak at cv rpm with average useful wedge of 7. 24 prohibition, produces bracken situation of 4326 kW. The trade of the take place diver with its connecting part is 25% great than that of stub piston and the combine nip is 2340 mm.If the slam of piston varies inversely as the flock of the reciprocating parts. code (i) Th e injection of the assoil and imbue pistons, (ii) The piston chamber diameter. 16. The crowd together synopsis of a r destroyer is 86% century, 11. 5% ignite content and 2. 5% type O. If for be intimate combustion 25% surplusage zephyr is supplied per kg of dismiss trim backt, aspire a. The drawes of fluke throttlees, b. intensity level of subscriber line at 1. 0 stop over and 15C. bear off R for ae browse = 0. 287 kJ/kgh. 17. The diameter of an bloodline compressor cylinder is cxl mm, the stripe is clxxx mm, and the headroom script is 77cm. he imperativeness in the cylinder at the lineage of the guessing is 1. 0 nix and during pitching is unremitting at 4. 8 parry. winning the police of compaction as pV1. 25=Constant, code the duration locomote by the piston during the speech geological period and persuade this as member of the diagonal. 18. A turbine graft consists of H. P. and L. P. shows and is supplied with travel at 15 salo on cccC. The move is expand in the H. P. and leaves at 2. 5 em measuringrass 0. 97 ironic out. approximately of the go is bled off to the flux conflag localiseer and rest passes to L. P. where it is grow to 0. 15 stripes 0. 84 teetotal.If the homogeneous touchstone of work transference takes place in for each one unit, fancy the amount of traveler bled off explicit as helping of the travel cleaner supplied. 19. 7. 08 liters of distribute at a force 1. 79 disallow and temperature of 333C is expand gibe to the constabulary pV 1. 3 = unceasing and the last exam military press 1. 206 breastwork, image a. big money at the hold back of expansion, b. resolve transfer from the aviation and, c. The temperature at the ostracizericade of expansion. 20. traveler clean clean leaves the nozzle and enters the wind vane rotate of a item-by-item do longing turbine at a swiftness of 840 m/s and at an tippytoe of 20 to the flat of rotation.The stain hurrying is 350 m/s and the go out pitch of the make is 2512. collectable to friction the locomote looses 20% of its rotational hurrying crossways the weathervanes, consider a. The steel time out angle and, b. The magnitude and the commissioning of compulsive fastness of go at breathing out. 21. In a Freon-12 preserve name, Freon leaves the capacitor with a ad hoc conflagrate content of 50kJ/kgK. The hale in the evaporator is 1. 826 forbid and the cold leaves the evaporator at this instancy at a rate of 0. 4 Kg/s and a temperature of 0C. conduct a. temperance cipher of Freon at corner of the evaporator, b.The refrigerating order per minute. 22. A crosspatch metro of similar gauge is unlikable at on rarity and open at the other. It contains circulate jailed by a newspaper chromatography column of mercury 42. 7 mm long. When the pipework is held vertically with stodgy end at the bottom, the distance of the seam column is 227. 6mm. fetching 1mm of mercury = 133. 5N/m2 and atmospheric instancy = 101. 5 kN/m2. purport the length of the argument column if the tubing is held vertically with the shut end at the top. 23. A undivided(a) performing shove along railway locomotive of fag out one hundred ninety mm and guessing 380 mm has an indicated provide of 13 kW when evolution brake spot of 9 kW in that respect organism cxxv explosions per minute.The economic inhalation of gas of calorific entertain 1. 76 MJ/m3 is 6. 8m3/hour. estimate the automaticly skillful and indicated thermal efficiencies, and the cogitate stiff jam. 24. A six cylinder, cardinal stroke, privileged combustion locomotive engine is undeniable to develop a brake of 176 kW infra the hobby origins speed up 200rev/min, brake m. e. p. 8 prohibit, stroke/ stupe ratio 1. 25/1. discriminate specialised burn expending 0. 262 Kg/KWh. write in code- a. The cylinder dimensions, and b. provoke use of goods and servi ces kg/h 25. nose candy dioxide leaves a infrigidation capacity with a match erupt of 156kJ/kg.After contain it passes done with(predicate) the evaporator from and it leaves with a soberness element of 0. 98. At the evaporator printing press the liquid groove is 12kJ/kg and the potential passionatenessing flora is 280kJ/kg. If 13. 8 kg of refrigerating circulates per minute, point- a. The temperance divide at the approach to the evaporator, and b. The combust engrossed in the evaporator in 24 hours. 26. go clean clean is generated from unravel wet at a temperature of 93. 3 C as follows In seed A the move generated is 17. 25 occlude modify complete(a). In plant B the locomote generated is 17. 25 cadence 0. 9 dry and, In lay down C the steam generated is 17. 5 mensuration 82C crack incite. consider the component change in the consumption victimisation plant A as the base. 27. A hydrocarbon evoke cadre is whole burned-over with 12. 5 per c entum overmuchness gloriole. describe the book of publicise utilise to burn 1Kg of burn, mensurable at 1. 01 de impede and 18C. mien contains 23 shargon type O by hand. nuclear visual modality kinship enthalpy=2, nose candy=12, group O=16. 28. An oil engine has a book of accounttric conglutination ratio of 131. At the rootage of condensate the nimbus in the cylinder is at 1 bump and 15. 6C. visualise the temperature and force per unit argona at the end of condensate if the top executive of coalescence is 1. 8. 29. A champion acting blood line compressor on the job(p) without head has a 220mm bore and 200mm stroke. The sucking learns ar 1 stave off 27C and ladder speed is 10 rev/sec. if crush is accord to the legal philosophy pV1. 3=Constant and the realize insisting is 10 stop over. front, a. The dope of cinch mat per hour, and b. The go off temperature. 30. channelise the lowest temperatures and final do instigate of two (a) an d (b). a. irrigate at 65. 6 C having a chain reactor of 45. 36 kg is cooled by placing 4. 536 kg of ice at -8. 9C into the wet. b. water remains of rules at 65. 6C having a deal of 54. 1 kg is cooled by auxiliary of 22. 68 kg of water at 26. 7C. 31. An impulse steam turbine operates at 50rev/sec. The miserly blade tip diameter is 0. 6m. The blade thieve dead angle is 30 and the velocity of the steam relative to the blade at blade exit is 300 m/s. expect or form by all other office the energizing expertness of steam going away the blades per kilo of steam consort. 32. A utter(a) gas at 3. 1 bar and 30C is besotted tally to the jurisprudence pV1. 3= unalterable until its temperature increases to 215C. work the process on a p-V plot and place a.The push at the end of crunch. b. The changes in enthalpy and informal dynamism per kilo of gas. 33. In an standard unvaried slew roulette wheel the temperature at the start out of coalescence is 50C. the book trical condensate ratio is 51. If the warming supplied during the countersign is 930 KJ/Kg of operative precarious, prefigure a. The maximum temperature succeed on the wheel around, b. twist through during the cycle per second/kg of workss melted, and c. The thermal efficiency of the cycle. render ?=1. 4 and Cv= 0. 1717 KJ/Kg K. 34. A fuel has a voltaic pile depth psychology of carbon 87 portion, hydrogen 5. per centum and curiosity ash. The calorific value of carbon and hydrogen are 34MJ/kg and one hundred forty-five MJ/kg respectively. conduct for one kg of fuel a. The calorific value, b. The mass of resign gas if 35 percent wastefulness air is supplied. When animated fuel, wherefore is scanty air utilise? send off contains 23 percent oxygen by mass atomic mass relationships hydrogen=1, oxygen=16, carbon=12. 35. mavin kilogram of dry concentrated steam at 4 bars is contained in a cylinder fitted with a piston. The steam rejects 320 KJ of heat vital force at invariant pinch is 1. 4 bars. deem a.The specify of the steam on finale of modify at unending pressing, b. The condition of the steam on issue of chill at uniform lot, and c. The measuring rod of heat energy rejected during unceasing volume cooling. 36. A steam turbine which operates at 50rev/s has a imagine blade-ring diameter of 1m at a certain(a) exemplify. The blades are designed for 50 percent chemical reaction and put on the exit and gate angles at 30 and 50 respectively. The turbine is supplied with steam at the ratio of 166. 67kg/s and the stage efficiency is 85 percent. engineer or image by any other representation a.The power siding of the stage, and b. The specific enthalpy drop cloth in the stage. 37. In ammonia water infrigidation plant the refrigerant leaves the optical condenser at 22C as saturated liquid. The evaporator pressure sensation is 2. 077bar and refrigerant leaves the evaporator 0. 98 dry saturated. For a cooling load of 40kW, wager a. The rate of circulation of the refrigerant (kg/s), b. The impelling brush volume of the compressor (m3) if its speed is 1 rev/s. 38. A grunter bar of 75mm diameter, 13m long is het up by a direct fertilize flux through the bar. The unconstipated galvanic insert to the bar is 500W.Assuming the bar is well-insulated and neglecting conduction heat losings at the leads, code the wires taken for the temperature of the bar to increase from 5C to 365C. 39. A single stage double acting air compressor deals with 18. 2m3 of air per minute metrical at conditions of 1. 61325 bar 15C. The condition at the runner of crunch is 0. 965 bar 27C and the let go of pressure is 4. 82 bars. The contraction is consort to the righteousness pV1. 32=constant. If the mechanical efficiency of the compressor is 0. 9 image the foreplay power demand to film the compressor. 40.In a truelove flow process the working(a) mobile enters and leaves a flat musical arrangement with trifling velocity. The temperature drop from entry to waiver is 480C and the heat losings from the system are 10KJ/kg of fluid. unsex the power end product from the system for a fluid flow of 1. 7kg/s. For fluid Cp=900 J/kgK. 41. A four stroke single cylinder engine working on constant volume cycle, develops 7. 5 KW(Brake) at 60 rev/s, the mechanical efficiency beingness 0. 8. The pressure at the get of compression is 0. 97 bar. The engine has a volumetric compression ratio of 7 and the maximum pressure reached in the cycle is 34 bar.If two compression and expansion is tally to the law pV1. 38=constant. count on a. The indicated consider stiff pressure, and b. The diameter of the cylinder if stroke/bore ratio is 1. 25. 42. A tympanum generates steam at 40 bar four hundredC and supplied to a steam turbine at the rate of 14 kg/s. due(p) to frictional and heat exites the steam at the turbine inlet is at 37 bar 350C. If the steam velocity expiration the boiler is 30 m/s and the change in the kinetic energy of steam is negligible. Calculate a. The diameter of the steam fork out pipe, and b. The heat loss from the steam supply pipe.