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Which instruments is used to measure humidity of the atmosphere continuously?Barographb. Thermographc. Hydrographd. Thermo-hydrograph1Entrance losses between tank and pipe or losses through elbows, fittings and valves are generally expresses as a functions of:Kinetic energyb. Pipe diameterc. Friction factord. Volume flow rate2The air that contains no water vapor is called:Zero airb. Saturated airc. Dry aird. Humid air3In psychrometric chart, the constant-enthalpy lines coincide with constant-temperature lines at temperatureAbove 50Cb. Below 40 Cc. Below 50 Cd. Above 10 C4The amount of moisture in air depends on itspressureb. volumec. temperatured. humidity5The deep body temperature of healthy person is maintained constant at27 deg Cb. 37 deg C47 deg C48 deg C6By increasing the condenser pressure in vapor compression cycle, which of the following will increase? (use per unit mass analysis)Refrigerating effectb. COPSpecific volume at suctionCompressor work7By increasing the condenser pressure in vapor compression cycle, which of the following will decrease? (use per unit mass analysis)Moisture content after expansionb. Compressor powerHeat rejected from condenserMass flow rate8If the pressure drop in the condenser increases in a vapor compression cycle, which of the following will increase? (use per unit mass analysis)Mass flow rateb. Compressor powerHeat rejected in the condenserSpecific volume at suction9If the pressure drop in the condenser increases in a vapor compression cycle, which of the following will decrease? (use per unit mass analysis)Refrigerating effectb. Mass flow rateHeat rejected in the condenserCompressor work10If the pressure drop in the condenser increases in a vapor compression cycle, which of the following will not be affected? (use per unit mass analysis)Compressor powerb. Mass flow rateHeat rejected in the condenserCOP11If the pressure drop in the evaporator increases in a vapor compression cycle, which of the following will increase? (use per unit mass analysis)Refrigerating effectb. Vaporizing temperatureHeat rejected in the condenserCOP12If the pressure drop in the evaporator increases in a vapor compression cycle, which of the following will decrease? (use per unit mass analysis)Specific volume at suctionb. Compressor powerHeat rejected in the condenserCOP13By lowering the condenser pressure in Rankine cycle, which of the following will decrease? (use per unit mass analysis)Pump workb. Turbine workHeat rejectedCycle efficiency14By increasing the Boiler pressure in Rankine cycle, which of the following will decrease? (use per unit mass analysis)Heat rejectedb. Pump workCycle efficiencyMoisture content15By superheating the steam to a higher temperature in Rankine cycle, which of the following will decrease? (use per unit mass analysis)Moisture content at the turbine exhaustb. Turbine workHeat addedHeat rejected16By superheating the steam to a higher temperature in Rankine cycle, which of the following will increase? (use per unit mass analysis)Moisture content at the turbine exhaustb. Pump workCondenser pressureCycle efficiency17By superheating the steam to a higher temperature in Rankine cycle, which of the following will increase? (use per unit mass analysis)Moisture content at the turbine exhaustb. Pump workCondenser pressureCycle efficiency18By reheating the steam before entering the second stage in Rankine cycle, which of the following will decrease?Turbine workb. Moisture content after expansionHeat addedHeat rejected19When Rankine cycle is modified with regeneration, which of the following will increase?Turbine workb. Heat addedHeat rejectedCycle efficiency20Is the combination of base load and peaking load.Rated loadb. Intermmediate loadCombine loadOver-all load21Sum of the maximum demand over the simultaneous maximum demand.Use factorb. Capacity factorDemand factorDiversity factor22Regenerative with feed heating cycle with infinite number of feedwater heaters thus efficiency is equal to:Otto cycleb. Stirling cycleErricson cycleCarnot cycle23A type of turbine used in desalination of sea water.Back pressure turbineb. Passout turbinePeaking turbineReaction turbine24States that when conductor and a magnetic field move relatively to each other, an electric voltage is induced in the conductor.Maxwells lawb. Kirchoffs lawFaradays lawNewtons law25Transfers heat directly to electrical energy by utilizing thermoionic emissions.Thermoionic motorb. Thermoionic generatorThermoionic convertorThermoionic cell26Is the largest group of coal containing 46-86% of fixed carbon and 20 to 40% volatile matter.anthraciteb. Sub anthraciteBituminousSub-bituminous27When 1 gram of coal is subjected to a temperature of about 105C for a period of 1 hour, the loss in weight of the sample gives the:Volatile matter and moistureb. ashFixed carbonMoisture content28When 1 gram of sample coal is placed in a crucible and heated 950oC and maintained at that temperature for 7 minutes, there is a loss in weight due to elimination of:Volatile matter and moistureb. ashFixed carbonMoisture content29Consist of hydrogen and certain hydrogen carbon compounds which can be removed from coal by heating.Moisture contentb. Product of combustionashVolatile matter30By heating 1 gram of coal in an uncovered crucible until the coal is completely burned, the _______ will formed.Volatile matter and moistureb. ashFixed carbonMoisture content31Caking coal are used to produce coke by heating in a coke oven in the absence of ___ with volatile matter driven off. airOiloxygennitrogen32Gindability of standard coal is:80b. 9010011033Major constituent of all natural gases is:ethaneb. methanepropanecethane34Two types of fans are:Centrifugal and axialb. Tangential and rotaryReciprocating and axialCentrifugal and rotary35Enthalpy of substance at specified state due to chemical composition.Enthalpy of reactionEnthalpy of combustionEnthalphy of formationd. Enthalpy of product36A type of boiler used for super critical pressure operation:La Mont boilerOnce-through circulation boilerForce Circulation boilerNatural circulation boiler37Economizer in a water tube boiler is heated by:Electric furnaceb. Electric currentIncoming flue gasOutgoing flue gas38Receives heat partly by convection and partly by radiation.Radiant superheaterb. DesuperheaterConvective SuperheaterPendant superheater39Regenerative superheater is a storage type of heat exchangers have an energy storage medium called:matrixb. regeneratorboilerrecuperator40Stirling cycle uses a _______ as working fluids.Incompressible gasb. Incompressible fluidsCompressible refrigerantCompressible fluids41In stirling process, the heat is added duringIsobaric processb. Isentropic processIsothermal processHeat process42Brayton cycle is also known as:Carnot cycleb. Joule cycleDiesel cycleRankine cycle43Is applied to propulsion of vehicles because of certain practical characteristics.Diesel cycleb. Otto cycleCarnot cycleBrayton cycle44Heat exchangers typically involve:a. No work interactionsb. No heat interactionsNo energy interactionsNone of these45A device that is used to convert the heat to work is called:adiabatierb. regeneratorHeat enginesNone of these46The objective of a heat pump is to maintain a heated space at:Low temperatureb. High temperatureMedium temperatureNone of these47A process is called _____________ if no irreversibilities occur outside the system boundaries during the process.Externally reversibleb. Internally reversiblereversibleNone of these48An energy interaction which is not accompanied by entropy transfer isenergyb. heatworkNone of these49The only devices where the changes in kinetic energy are significant are the compressorb. pumpsNozzles and diffusersNone of these50The distance between the TDC and BDC in which the piston can travel is theRight extreme positionb. Displacement strokeStroke of the EngineSwept Stroke51In compression-engine, the combustion of air-fuel mixture is self-ignited as a result of compressing the mixture above itsSelf developed temperatureb. Mixing temperatureSelf feed temperatureSelf ignition temperature52The superheated vapor enters the turbine and expands isentropically and produces work by the rotating shaft. The _________ may drop during the process.densityb. viscosityTemperature and pressureNone of these53Only _______ of the turbine work output is required to operate the pump.01%.02%.03%.04%54Superheating the steam to higher temperatures decreases the moisture content of the steam at the ____________.Turbine inletCompressor inletCompressor exitd. Turbine exit55Regeneration also provides a convenient means of dearating the feedwater to preventBoiler explosionb. Boiler scale productionBoiler corrosion Compressor damage56Can be applied in Steam turbine cycle (rankine), Gas turbine cycle (Brayton) and Combined cycle.Hydroelectric plantb. Nuclear power plantCogeneration plantTidal power plant57In a rankine cycle with fixed turbine inlet conditions. What is the effect of lowering the condenser pressure, the heat rejected will:increaseb. decreaseRemains the sameNone of these58How do the following quantities change when the simple ideal Rankine cycle is modified with regeneration? The heat rejected will:Increase b. decreaseRemains the sameNone of these59It is an obvious reason for incomplete combustion.Insufficient carbonb. Insufficient airInsufficient nitrogenInsufficient oxygen60A rule of thumb is that the COP improves by ____ for each oC the evaporating temperature is raised or the condensing temperature is lowered2-4% b. 6-7%1-5%6-10%61Are generally more expensive to purchase and install than other heating systems, but they

refrigerator b. AdiabatorHeat pumpshumidifier62The most widely used absorption system is the ammonia-water system, where ammonia is served as refrigerant and water as the cooling b. heatingHeating and coolingTransport medium63