POWER PLANT DESIGN EXAM:3. Consider a tall man standing in a breezy room at 20 deg C. Determine the total rate of heat transfer from this tall man if the exposed surface area and the average outer surface temperature of the tall man are 1.6 m2 and 29 deg C, respectively and the convection heat transfer coefficient is 6 W/m2 with emissivity factor of 0.95.

a. 168.1 Watts

b. 198.1 Wattsc. 186.4 Watts

d. 181.7 Watts

Consider a person standing in a breezy room @ 20 C. Determine the total rate transfer from this person of the exposed surface area and the average outer surface temperature of the person are 1.6m2 and 29 deg C. And the convection heat transfer coefficient is 6 W/HR with emmisivity of 0.95. A. 86.40 watts B. 81.70 wattsC. 198.1 wattsD. 168.1 watts4. A type of boiler used for super critical pressure operation.

a. Natural circulation boiler

b. Once through circulation boiler

c. Force circulation boiler

4. La Mont boiler

http://wiki.answers.com/Q/What_is_difference_between_subcritical_supercritical_boiler5. A solid 50 kg block of iron casting at 500 K is submerged into a large lake of water which has a temperature of 265 deg K. The solid block iron eventually reached its thermal equilibrium with the lake water. Assuming its average specific heat of 0.45 kJ/kg-K for the block iron. Find the entropy generated during this process.

a. 4.12 kJ/K

b. -12.65 kJ/K

c. 16.32 kJ/K

d. 13.97 kJ/K

A 500 kg block of iron casting at 500 deg K is thrown into a large lake that is at a temperature of 258 deg K. The iron block eventually reaches thermal equilibrium with the lake water. Assuming average specific heat of 0.45 KJ/kg-K for the iron. Determine the entropy generated during the process.A. -12.65 KJ/KB. 16.97 KJ/KC. 4.32 KJ/KD. 6.32 KJ/K 6. A large mining company in Banquet was provided with a 3 m3 of compressed air tank. Air pressure in the steel tank drops from 700 kPa to 150 kPa while the temperature remains constant at 25 deg C. Determine percentage has the mass of air in the tank been reduced.

A. 78.57%

A large mining company was provided with a 3 m3 of compressed air tank. Air pressure in the tank drops from 700 Kpa to 150Kpa while the temperature remains constant at 28 deg C. What percentage has the mass at air in the tank been reduced.A. 74.00B. 72.45C. 78.56D. 78.578. How do you call the ice formation on a refrigeration system at the expansion valve device, making the said device inoperative?

a. Freezing

b. Ice formation

c. Pump-down

d. Freeze up

9. A 600 New power nuclear plant uses 4 percent enriched Uranium fuel has a thermal efficiency of 36 percent. The burn up allowed of the fissionable portion of the fuel is 20%. Compute how many million tons of natural uranium is placed in the reactor vessel for one year continuous operation?

a. 79.35 mt/yr

b. 68.56 mt/yr

c. 56.77 mt/yr

d. 69.34 mt/yr

A 600 MWe PWR nuclear plants uses 4% enriched Uranium fuel has a thermal efficiency of 36%. The burn up allowed of the fissionable portion of the fuel is 20%. Calculate how many metric tons of natural Uranium is placed in the reactor vessel for one year continuous operation?

A. 69.34

B. 79.35

C. 88.56

D. 56.77

10. Which dam is best for weak foundation?

a. earth

b. gravity

c. buttress

d. archhttp://osp.mans.edu.eg/tahany/dams1.htm11. A cubical shape tank of 2 m sides is constructed of metal steel plate 12 mm thick which contains water at 75 deg C. The surrounding air temperature is 16 deg C. Determine the heat loss through each side of tank per minute. Take the coefficient of thermal conductivity of the metal as 48 W/m-K, the coefficient of heat transfer of the water 2.5 kW/m2-K, and the coefficient of hear transfer of the air 16 W/m2-K.

a. 124.3 kJ/min

b. 214.3 kJ/min

c. 224.3 kJ/min

d. 229.3 kJ/minA cubical tank of 2 m sides is constructed of metal plate 12 mm and contains water at 75C. The surrounding air temperature is 16C. Calculate the over all heat transfer coefficient fro water to air. Take the coefficient of thermal conductivity of the metal as 48 W/m-k, the coefficient of the thermal conductivity of the metal as 48 W/m-k, the coefficient of heat transfer of water is 2.5 KW/m2k and the coefficient of heat transfer of the air is 16 W/m2-k.

A. 15.84 W/m2-k

B. 14.84 W/m2-k

C. 16.84 W/m2-k

D. 13.84 W/m2-k

12. A newly built power plant has a stream operation header pressure of 150 psig dry and saturated with engine exhaust at atmospheric pressure. Initial feedwater temperature is 65 deg F and the enthalpy of team at header h = 1195.6 Btu/lb. What will be the fuel saving in percent if a feed water heater is installed using exhaust steam and heating the water to a temperature of 205 deg. F.a. 12.15%

b. 12.04%

c. 21.21%

d. 15.12%

13. A gas furnace burns coal with the following ultimate analysis: C= 80.17%, H = 4.34%, O = 2.69%, N = 1.45%, S = 0.84%, A = 7.09%, W = 3.42%. For a 15% excess air and complete combustion. Determine the actual air needed per kg if water is to be included and air is at a temperature of 28 deg. C and 0% RH (w = 0.0143 kgv/kgda).

a. 15.43

b. 9.78

c. 10.32

d. 12.43

14. In an experiment to determine the calorific value of an oil fuel by means of a bomb calorimeter, the mass of the sample of fuel is 0.75 gram, mass of water surrounding the bomb calorimeter 1.8 kg, water equivalent of bomb and fittings 470 grams and the rise in temperature is 3.3 deg C. What is the calorific value of this oil in MJ/kg assuming a specific heat of water = 4.2 kJ/kg-K.

a. 25.63 MJ/kg

b. 32.15 MJ/kg

c. 41.94 MJ/kg

d. 65.63 MJ/kg

15. Is used as working fluid in high-temperature application of vapor cycles?

a. Water

b. Deuterium

c. Heliumd. Mercuryhttp://josiah.berkeley.edu/2007Fall/ER200N/Readings/Cengel_2001_Cycles.pdf16. What process steam is basic need in its operation and power is a by-product, this cycle is known as ________.

a. by-product cycleb. short cycle

c. cascading cycle

d. refrigeration cycle

17. In a lithium bromide solution absorption refrigeration system, which of the following is the function of water?

a. coolant

b. refrigerant

c. absorbent

d. analyzer

18. The total head of a forward curve fan is 187 m and has a static pressure of 210 mm of water gage. What is the velocity of air flowing if density of air is 1.15 kg/m3.

a. 9.28 m/sec

b. 6.75 m/sec

c. 5.45 m/sec

d. 7.69 m/secThe fan has a total head of 190 m and a static pressure of 20 cm WG. If the air density is 1.2 kg/m3, what is the velocity of air flowing?

A. 16.21 m/s

B. 17.21 m/s

C. 16.66 m/s

D. 17.766 m/s19. What do you call the mixtures or substances that are used in laboratory methods of producing a drop in temperature? The usual example is mixture of ice and salt?

a. Hygroscopic mixture

b. Frigorific mixture

c. water-ammonia mixture

d. calorific mixture

20. Find the temperature for which a thermometer with degrees Fahrenheit numerically twice the reading of the temperature in degrees centigrade.a. 18.3 deg F

b. 320 deg F

c. -34.6 deg Fd. 160 deg F

21. Consider a refrigeration room whose 40 watts incandescent light by remains on the on position continuously as a result of a defected switch. If the refrigeration has a COP of 1.3 and the costs of electricity is 8 cents per kW-hr. Determine the increase in the power consumption of the refrigeration and its cost per year if the defect switch is not fixed or charge.

a. P 86.59

b. P 59.59

c. P 48.59

d. P 49.59

22. What is the intercooler pressure between first and second stage of compressor if a 10 stage air compressor compresses air from 100 to 800 kPa?

a. 113.21 kPa

b. 333.11 kPa

c. 123.11 kPa

d. 282.11 kPa

23. By heating 1 gram of coal is an uncovered crucible until the coal is completely burned, the _______ will formed.

a. Moisture

b. volatile matter and moisture

c. fixed carbond. ash 24. Newly installed single acting air compressor which has a clearance of 6% takes in air at an atmosphere pressure and temperature of 85 deg F. Discharges it at a pressure of 85 psia. The air handled is 0.25 ft3/cycle which is measured at the discharge. What is the air hp of compressor if its rpm is 750 and its compression is isentropic?a. 61 hp

b. 16 hp

c. 96 hp

d. 69 hp.25. By superheating the refrigerant in a refrigeration system without useful cooling, the refrigerating effect per unit mass will __________.

a. negative

b. positive

c. remains the same

d. decrease

26. A diesel cycle has an expansion ratio of 4 and a cut off ratio of 2.5. What is the clearance of the diesel cycle?

a. 10.55%

b. 15.11%

c. 10.11%

d. 11.11%A diesel cycle has a cut off ratio of 2.5 and expansion ratio of 4. Find the clearance of the cycle.A. 9.11%B. 5.55%C. 11.11%D. 15.15% 27. If a constant supply of heat at 1.25 kW is supplied to the aluminum kettle, how many hours would it take to boil down 1.2 kg of water?

a. 0.6 hrs

b. 18 hrs

c. 52 hrs

d. 36 hrs

28. In the absorption refrigeration system, a pressure vessel is mounted above the generator through which the vapor leaving the generator pass. How do you call this component?

a. analyzerb. rectifier

c. reflux

d. absorber

29. A double purpose tank 18 ft wide, 24 ft long and 4 ft depth is filled with water. What is the weight of water in the tank in long tons?

a. 48 tons

b.

c. 49 tons

d. 50 tons

30. Which if the following _______ does not belong to the group?

a. flow energy

b. potential energy

c. heat energy

d. kinetic energy31. A newly constructed power plant in the Visayas has a steam operating header pressure of 150 psig dry and saturated with engine exhaust at atmospheric pressure. Initial feed-water temperature is 65 deg F. How much fuel will be save in percent, if a feedwater heater is installed using an exhaust steam and heating the water to a temperature of 205 deg F? Enthalpy of steam at header is h = 1195.6 Btu/lb.

a. 11.05%

b. 12.04%

c. 21.04 % - not sure!!!d. 13.04%32. An ideal gas at 0.80 atmospheres and with a temperature of 87 deg C occupies 0.45 liter. How many moles are in the sample? (R = 0.0821 liter-atm/mole-K).

a. 0.0122 mole

b. 0.0378 mole

c. 0.0191 mole

d. 0.0012 mole

33. A 3.0 liter, 5-cylinder, 4-stroke cycle SI engine, with a volumetric efficiency of 87%, operating at 3000 rpm using gasoline with a n = 0.91 bore and stroke are related as 5:1.08. At a certain point in the enginer cycle, the gas temperature in the combustion chamber is Tg = 2100 deg C while the cylinder wall temperature is Tw = 190 deg C. Viscosity and thermal conductivity of gases (air at 1145 deg C) Ug = 5.21 x 10-5 kg/msec kg= 0.090 W/m-K are respectively. Convective heat transfer coefficient of c1 = 0.015 and c2 = 0.08. Calculate the approximate convection heat transfer rate to the cylinder wall at this instant.a. 45.44 kW/m2b.35.42 kW/m2c. 32.54 kW/m2d. 54.32 kW/m234. The color of lubricating oil is obtained by reference to transmitted light; the color reflected by light is referred to as:

a. reflection

b. deflection

c. bloom

d. residue

http://www.techtransfer.com/resources/wiki/entry/2796/35. Use to minimize the speed rise due to a sudden load rejection. a. Gate valve

b. Shut-off valve

a. jet deflector

b. Needle valve

36. The actual velocity of gas entering in a free standing welded steel chimney is 8 m/sec. The gas temperature is 25 deg C with a gas constant of 0.287 kJ/kg-K. What is the gas pressure for a mass of gas of 50,000 kg/hr with a chimney diameter is 1.39 m?

a. 101.55 kPa

b. 92.35 kPa

c. 95.05 kPa

d. 97.85 kPa

37. A 1.0 m x 1.5 m cylindrical galvanized steel tank is full of oil with sg = 0.92. What is the force acting at the bottom of the tank in dynes?

a. 106.33 x 106 dynes

b. 106.33 x 106 dynes

c. 106.33 x 104 dynes

d. 106.33 x 103 dynes

Find the force acting at the bottom of the tank in dynes.A. 106.33x107 dynesB. 106.33x104dynesC. 106.33x105 dynesD. 106.33x106 dynes 38. What is the discharge capacity of a cement concrete pipe culvert 4 ft diameter and 10 m long if the difference in water level at the outlet 1.52 m? Assume coefficient of discharge of 0.75.

a. 7.42 cu m/s

b. 4.72 cu m/s

c. 7.24 cu m/s

d. 4.27 cu m/s

39. A rule of thumb is that the COP improved by ______ for each degree Cthe evaporating temperature is raised or the condensing temperature lowered.

a. 6 to 10%

b. 6 to 7 %

c. 1 to 5%

d. 2 to 4%

40. The pitot tube measures

a. the gage pressure

b. the dynamic pressure

c. the static pressure

d. the total pressure

The pitot static tube measurea. The static pressureb. The gage pressurec. The total pressured. The dynamic pressure41. What is the best technical and modern way of detecting air compressor leak?

a. acoustic leak detector

b. air leak detector

c. gas leak detector

d. soup and water

http://www.airbestpractices.com/system-assessments/leaks/finding-and-fixing-leaksLeak Detection

Since air leaks are almost impossible to see, other methods must be used to locate them. The best way to detect leaks is to use an ultrasonic acoustic detector, which can recognize the high frequency hissing sounds associated with air leaks. These portable units consist of directional microphones, amplifiers, and audio filters, and usually have either visual indicators or earphones to detect leaks.

Ultrasonic leak detection is probably the most versatile form of leak detection. Due to its capabilities, it is readily adapted to a variety of leak detection situations. The principle behind ultrasonic leak detection is simple. In a pressure or vacuum leak, the leak flows from a high pressure laminar flow to a low pressure turbulence. The turbulence generates a white noise which contains a broad spectrum of sound ranging from audible to inaudible frequencies. An ultrasonic sensor focuses in on the ultrasonic elements in the noise. Since ultrasound is a short wave signal, the sound level will be loudest at the leak site. Ultrasonic detectors are generally unaffected by background noises in the audible range because these signals are filtered out. This means leaks can be heard in even the noisiest environments.

The advantages of ultrasonic leak detection include versatility, speed, ease of use, the ability to perform tests while equipment is running, and the ability to find a wide variety of leaks. They require a minimum of training, and operators often become competent after 15 minutes of training.

42. How many pounds of air per hour will it cool from a temperature of 70 deg F to a temperature of 90 deg F at constant pressure, when a refrigeration plant is rated at 15 tons capacity?

a. 45,050 lbs/hr

b. 50,500 lbs/hr

c. 37,500 lbs/hr

d. 52,050 lbs/hr

A refrigeration plant is rated at 15 Tons capacity. How many pounds of air per hour will it cool from 70 deg F to 90 deg F at constant pressure.A. 50,000 lbs/ hrB. 34.53 lbs/hrC. 52,000 lbs/hrD. 45,000 lbs/hr 43. What is the boiling point of Freon-12 at atmospheric pressure in negative sign?

a. 30 deg F

b. 21 deg F

c. 25 deg F

d. 5 deg F

44. If the back work ratio of the plant is 0.005 and the thermal power net power of 10 MW, what will be the compressor work?a. 50.35 kW

b. 50.20 kW

c. 50.25 kW

d. 50.35 kW

A thermal power plant has a net power of 10 KW. The backwork ratio of the plant is 0.005. Determine the compressor work.A. 50.15 KWB. 50.35 KWC. 50.25 KWD. 50.45 KW45. A dual cycle has an initial temperature of 10 deg C. The compression rate of 6 and the heat addition at constant volume process is 600kJ/kg. If cut-off ratio is 2.5, find the maximum temperature of the cycle.

a. 3965.5 deg C

b. 3636.50 deg C

c. 3365.30 deg C

d. 3565.5 deg C46. A fresh supply of 50 kilograms chicken at 6 degC contained in a box is to be frozen to 18 deg C in a a electruc freezer. What will be the amout of heat that needs to be removed? The latent heat of chicken is 240 kJ/kg, and its specific heat is 3.32 kJ/kg-K above freezing and the specific heat of the box material is 1.4 kJ/kg-K below and the freezing temperature of chicken is -2.8 deg C.a. 11, 863 kJ

b. 15206.4 kJ

c. 15156 kJ

d. 1250 kJ

47. When air enters a diffuser with a velocity of 200 m/s, find the velocity of sound if air temperature is at 30 deg C?

a. 369 m/s

b. 359 m/s

c. 349 m/s

d. 339 m/s

Air enters a diffuser with a velocity of 200 m/s. Determine the velocity of sound if air temperature is 30 deg C.A. 249 m/sB. 359 m/sC. 369 m/s D. 379 m/s

48. With an enthalpy of 600 kJ and velocity if 250 m/s a 4 kg air enterimg the turbine. The enthalpy at exit is 195 kJ and velocity of 170 m/s. What is the work developed if there is a heat loss of 10 kJ?

a. 262.2 kJ

b. 171.2 kJ

c. 128.83 kJ

d. 28.2 kJ

49. What is the resulting pressure when one pound of air is at 15 psia and temperature at 200 deg F is heated at constant volume to 800 deg F?a. 28.6 Psib. 58.1 Psi

c. 36.8 psia

d. 18.2 psia

50. A closed feedwater heater,with a transmittance of U = 350 Btu/hr-ft2-F uses condensing steam at a pressure of 20 psi (Tnet = 227.96 F) for heating 85,000 lb/hr of water from a temperature of 60F to a temperature of 215 F. Calculate the transmitting area?a. 234 ft2

b. 976 ft2

c. 622 ft2

d. 627 ft2

51. The piston approaches ________ when the fuel injection process in diesel engine starts.

a. haftway of the stroke

b. aproaches TDC

c. entering TDC

d. leaving TDC

52. Cascade refrigeration system are normally connected in ________.

a. vertical

b. series parallel

c. parallel-series

d. series

53. In a hydraulic plant in NPC Iligan the difference in elevation between the surface of the water intake and the tailrae is 650 ft when the flow is 90 cfs, the friction loss in the penstock is 65 ft and the head utilized by the turbine is 545 ft. The mechanical friction in the turbine is 110 Hp, and the leakage loss is 4 cfm. Find the hydraulic efficiency.

a. 84.75 %

b. 93.16%

c. 84.57%

d. 85.47%In a hydraulic plant the difference in elevation between the surface of the water at intake and the tailrace is 650 ft. when the flow is 90 cfs, the friction loss in the penstock is 65 ft and the head utilized by the turbine is 500ft. the mechanical friction in the turbine is 110 Hp, and the leakage loss is 40 cfs. Find the hydraulic efficiency.

54. What is the type pf condenser that operates like a cooling tower?

a. Evaporative condenser

b. air cooled condersing

c. shell and tube evaporator

d. Water-cooled condenser

55. A type of gas is in the tank, If two (2) kg of gas is In a Steel tank with a pressure of 200 kPa and a temperature of

a. Methane

b. Methane

c. Ethylene

d. Butane 56. Which of the following is one of the main purposes of refractory in a boiler furnace?a. Prevent excessive furnace heat loss

b. Protect economizer from excessive heat

c. Help preheat the air for the furnace

d. Help preheat the feed water

57. In a remote hydro-electric plant, water flows at 10 m/s in a steel penstock of 1 m2 cross-sectional area. If the net head of the plant is 30 m and the turbine efficiency is 87%, what is the turbine output?

a. 3,626.34 kW

b. 2,560.41 kW

c. 3,124.65 kW

d. 2,501.55 kWIn a hydro-electric plant, water flows at 10 m/s in a penstock of 1 m2 cross-sectional area. If the net head of the plant is 30 m and the turbine efficiency is 85 %, what is the turbine output?

A. 2,501.55 kW

b. 2,100.21 kW

C. 3,626.34 kW

D. 3,124.65 kW

58. What is the rise in temperature of water dropping over 200 ft waterfall and settling in a basin below? Neglect all friction and assume negligible initial velocity.a. -0.376 deg F

b. -0.543 deg F

c. -0.257 deg F

d. -0.543 deg F

What is the rise temperature of water dropping over a 200 ft waterfall and settling in a basin below? Neglect all friction and assume initial velocity is negligible.

A. - 0.543 deg. F

B. - 0.257 deg. F

C. - 0.376 deg. F

D. - 0.543 deg. F59. Sightly glass is usually located at;

a. bet condenser and liquid receiver

b. liquid line

c. hot gas line

d. evaporator line

60. Kerosene is the fuel of a newly built gas turbine plant: fuel-are ratio is af = 0.035, T3 = 972 K, pressure ratio, rp = 4.5, exhaust to temperature. Find the available energy in kJ per kg air flow. Assume k = 1.34 and Cp = 1.13 kJ/kg-K.a. 252.65 kJ/kg

b. 352.65 kJ/kg

c. 452.65 kJ/kg

d. 360.65 kJ/kg

Kerosene is the fuel of a gas turbine plant: fuel-air ratio m1=0.012, T3 =972 K, pressure ratio, rp= 4.5, exhaust to atmosphere. Find the available energy in KJ per air flow. Assume k = 1.34 and Cp = 1.13.

A. 352.64 kJ/kg

B. 452.64 kJ/kg

C. 25.64 kJ/kg

D. 552.64 kJ/kg

61. A small drop of water at 80 deg F is in contact within air and has diametr of 0.02 in. If the pressure within the droplet is 0.082 psi greater than the atmosphere, what is the value of the surface tension?

a. 0.00876 lb/ft

b. 0.00654 lb/ft

c. 0.00492 lb/ft

d. 0.00043 lb/ft

62. A single acting air compressor with a clearance of 6% takes in air at atmospheric pressire and temeprature of 85 deg F, and discharge it at a pressure of 85 psia. The air handlled is 0.25 ft3/cycle measured at discharge pressue. If the compression is isentropic, find the air hp of the compressor if rpm is 750.

a. 61 hpb. 69 hp

c. 16 hp

d. 96 hp

63. Which instruments is used to measure humidity of the atmosphere continuously?a. Thermograph

b. thermometer

c. thermo-hydrograph

d. hydrograph64. The lower haft of a 10 m high steel cylindrical container is filled with water and the upper haft is filled with oil that has SG = 0.85. Find the pressure difference between the top and bottom of the cylinder.

a. 98.1 kPa

b. 83.38 kPa

c. 90.24 kPa

d. 92.72 kPa

75. Two large plane surface are 1 in apart, and the space between them is filled with a liquid of absolute viscosity of 0.02000lb-sec/ft2. Assuming the velocity gradient to be a straight line. What force is required to pull a very thin plate of 4 ft2 area at constant speed of 1 ft/sec if the plate is 1/3 in from one if the surface?

a. 4.32 lbs

b. 7.82 lbs

c. 5.67 lbs

d. 56.7 lbs

77. A 3.0 liter, 5-cylinder, 4-stroke cycle SI engine, with a volumetric efficiency of 87%, operating at 3000 rpm using gasoline with a n = 0.91 bore and stroke are related as 5:1.08. At a certain point in the enginer cycle, the gas temperature in the combustion chamber is Tg = 2100 deg C while the cylinder wall temperature is Tw = 190 deg C. Viscosity and thermal conductivity of gases (air at 1145 deg C) Ug = 5.21 x 10-5 kg/msec kg= 0.090 W/m-K are respectively. Convective heat transfer coefficient of c1 = 0.015 and c2 = 0.08. Calculate the approximate convection heat transfer rate to the cylinder wall at this instant.

a. 45.44 kW/m2b.35.42 kW/m2c. 32.54 kW/m2d. 54.32 kW/m277. Wet material containing 220% moisture(dry basis) is to be dried at the rate of 1.5 kg / s in a continuous dryer to give a product containing 10%(dry basis). Find the moisture removed in kg / hr.

a.

b. 3543.75c. 3533.75 kg/hr

d. 3953.75 kg/hr

Wet material containing 220% moisture(dry basis) is to be dried at the rate of 1.5 kg / s in a continuous dryer to give a product containing 10%(dry basis). Find the moisture removed in kg / hr.

3543.75 kg / hr

3513.75 kg / hr

3563.75 kg / hr

3563.75 kg / hr78. _______________________________________ ted box containing helium gas falls from a balloonThe earths surface. Calculate the temperature rise

Helium when box hits the ground level.

____________________________________________________________________________________

An insulated box containing helium gas falls from a balloon 4.5km above the earths surface. Calculate the temperature rise in deg C of helium when box hits the ground.A. 15.2B. 14.1C. 25.3D. 12.6 79. __________________________ stage air compressor compresses air from 100 kPa to 700 kPa

______________________________ intercooler pressure between the second and third.

a.

b.365.88 kPac. 375.88 kPa

d. 385.83 kPa

80. What is the hydraulic gradient of a 1 mile, 17 inches inside diameter pipe when 3300/min of water flow with f = 0.03.a. 0.00714b. 0.00614c. 0.00234d. 0.00187 a.

b.

c. 1.04 lbs

d. 1.34 lbs

81. _________________ of carbon dioxide a pressure of 20 psia at 200 deg F

___________ volume.

1.24

Determine the specific gravity of carbon dioxide gas (molecules weight = 44) at 150F (66C) and 20 psia (138kPa).

A. 1.67

B. 1.45

C. 1.87

D. 1.30 ____________________________________________________________________________________

82. ____________ constructed refrigeration plant is rated at 15 tons capacity.

__________________ pounds of air per hour will it cool from 70 to 90 deg F. At ______ pressure?

a. _____ lb/hr

b. _____ lb/hr

c. 37,500 lb/hr

d. 50,000 lb/hr

A refrigeration plant is rated at 15 Tons capacity. How many pounds of air per hour will it cool from 70 deg F to 90 deg F at constant pressure.A. 50,000 lbs/ hrB. 34.53 lbs/hrC. 52,000 lbs/hrD. 45,000 lbs/hr __________________________________________________________________________

83. What is the best group of coal containing 46-86% of fixed carbon and 20-40% of volatile matter. r?

a. sub-bituminous

b. anthracite

c. bituminous

d. sub-antracite

http://anto-hendarto.blogspot.ae/2009/01/coal.htmla. 10751.3 kg

b. 12365.2 kg

c. 9449.2 kg

d. 7545.2 kg

Helium gas is at a temperature of 20 deg C, what will be the work ___________ process?

a. 906 kJ/kg

b. 609 kJ/kg

c. 306 kJ/kg

d. 783 kJ/kgWhen adding the refrigerant in refrigeration system, it shall be Charge into which of the following part of then system

a. Low and high pressure side

b. Compressor discharge line

c. Low pressure side

d. High pressure sideA 1.0 m x 1.5 m cylindrical galvanized steel tank is full of oil with sg = 0.92. What is the force acting at the bottom of the tank in dynes?

a. 106.33 x 107 dynes

b. 106.33 x 105 dynes

c. 106.33 x 104 dynes

d. 106.33 x 103 dynes

_____________________acting at the bottom of a vertical column of water is ______________ The height of thin column?

a. 10.33b. 2

c. 9.8 in

d. 12 in

Manometer is used to measure

Velocities at airport

a.

b.

c. in gases

d. in liquids

generating plant has a utilization factor of 71% and a load.

What is the average load in the plant?

a.

b.

c. 9840.6 kW

d. 7654.2 kW

A lodging firm in Isabela operates a diesel power plant to supply its electric plant to supply its energy requirement during 24 hrs period, the plant consumed 250 gallons of fuel at 80 deg F and produced 2900 kw-hrs. Industrial fuel ause is 30 deg API and was produced at 3000/L at deg F. Determine the overall thermal eff of the plant.A. 26.08%B. 34.23%C. 28.00%D. 18.46% 98. A pre-insulated rigid steel tank initially contains 1.5 lb of helium at a temperature of 80 deg F and pressure of 50 psia. A paddle wheel with 0.02 hp is operated within the tank in 30 min. Compute for the final temperature.

a. 169.22 deg Fb. 179.22 deg Fc. 139.22 deg F

d. 189.22 deg F

An insulated rigid tank initially contains 1.5 lb of helium at 80 deg F and 50 psi. A paddle wheel with a power rating of 0.02 hp is operated within the tank for 30mins. Determine the final temperature.A. 159.22 deg FB. 235.58 deg FC. 179.22 deg FD. 189.22 deg F 99. How do you call this type of refrigeration system wherein only part of circulated refrigerant is evaporated, with the remainder being separated from the vapor and then re-circulated?a. Vapor refrigeration system

b. Vacuum refrigeration system

c. Absorption Refrigeration system

d. Flooded systems

100. A rigid steel container is closed at one end and measures 8 in diameter by 12 in long. The container is held vertically and is slowly move downward until the pressure in the container is 17 psia. What will be the height the container from the depth of the top of the container from the free water surface?

a. 63.69 inb. 69.89 inc. 42.69 in

d. 59.29 in

A 4 kg air enters a turbine with enthalpy of 600 kJ and velocity of 250 m/s. The enthalpy at exist is 486 kJ and a velocity of 170 m/s. What is the work developed if there is heat loss of 10 kJ?

A. 128.83 kJ

B. 171.2 kJ

C. 80.2 kJ

D. 28.3 kJ

Kerosene is the fuel of a gas turbine plant: fuel-air ratio m1=0.012, T3 =972 K, pressure ratio, rp= 4.5, exhaust to atmosphere. Find the available energy in KJ per air flow. Assume k = 1.34 and Cp = 1.13.

A. 352.64 kJ/kg

B. 452.64 kJ/kg

C. 25.64 kJ/kg

D. 552.64 kJ/kg