Introduction To MATLAB For Engineers 3rd Edition William Palm III - Solutions

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What are the most favorable sites for installing wind turbines?
Draw the layout of a simple thermal power plant and explain the function of its various parts.
What are the advantages and disadvantages of nuclear power plant?
Discuss the merits and demerits of renewable and non-renewable sources of energy with suitable examples.
What are the methods of harnessing solar energy? Explain the principle of wind-mill.
Describe with a neat sketch the construction and working of a nuclear power plant. Describe the working principle of the high head hydel power station.
What are the salient features of conventional energy sources?
Explain the working of a solar flat collector.
Describe with neat sketch the working principle of the high-head hydel power plant: (a) What are its advantages over other power plants? (b) Explain the use of cooling tower in thermal power plant.
What are the various forms of energy? List the non-conventional sources of energy.
Write a short note on solar energy?
Discuss the hydraulic turbines and gas turbines?
Discuss the function of condensers.
Write a short note on wind energy and its conversion.
Device used to generate and supply steam at a high pressure and temperature is known as:(a) Steam injector(b) Steam boiler(c) Steam turbine(d) Steam condenser
Fire tube boilers are:(a) Internally fired(b) Externally fired(c) Both(d) None of the above
Fire tube boilers are:(a) Lancashire boiler(b) Cochran boiler(c) Locomotive boiler(d) All of the above
Number of fire tubes in Lancashire boiler are:(a) 1(b) 2(b) 3(d) 4
In a Lancashire boiler, the economizer is located:(a) Before air preheater(b) After air preheater(c) Between the feed pump and drum (d) All of the above
Locomotive boiler is:(a) Vertical, multitubular, fire-tube type(b) Horizontal, multitubular, fire-tube type(c) Horizontal, multitubular, water-tube type(d) None of the above
Water tube boiler is:(a) Babcock and Wilcox boiler(b) Stirling boiler(c) Benson boiler(d) All of the above
Babcock and Wilcox boiler has water tubes:(a) Vertical(b) Horizontal(c) Inclined(d) None of the above
If circulation of water takes place by convection currents, set up during the heating of water, the boiler is known as:(a) Natural circulation boiler(b) Forced circulation boiler(c) Internally fired boiler(d) Externally fired boiler
If circulation in boiler made by pump, then it is known as:(a) Natural circulation boiler(b) Forced circulation boiler(c) Internally fired boiler(d) Externally fired boiler
If combustion takes place outside the boiling water region, the boiler is known as:(a) Natural circulation boiler(b) Forced circulation boiler(c) Internally fired boiler(d) Externally fired boiler
If combustion takes place inside the boiling water region, the boiler is known as:(a) Natural circulation boiler(b) Forced circulation boiler(c) Internally fired boiler(d) Externally fired boiler
In forced circulation boiler, forced is applied to:(a) Draw water(b) Drain off the water(c) Circulate water(d) All of the above
Forced circulation boiler is:(a) La-Mont boiler(b) Benson boiler(b) Loeffler boiler(d) All of the above
Safety Valve used in locomotive boilers is:(a) Lever safety valve(b) Dead weight safety valve(c) High steam and low water safety valve(d) Spring loaded safety valve
A device used to empty the boiler, when required and to discharge the mud, scale or sediments collected at the bottom of the boiler, is known as:(a) Safety valve(b) Stop valve(b) Fusible plug(d) Blow off cock
An accessory of boiler is:(a) Feed pump(b) Feed check valve(c) Stop valve(d) Blow off cock
A device used for recovery of waste heat of flue gas to heat the air before it passes into the furnace is known as:(a) Superheater(b) Air preheater(c) Injector(d) Economizer
Boiler mounting is:(a) Economizer(b) Injector(c) Fusible plug(d) Super heater
Ratio of heat used in steam generation and heat supplied to the boiler is known as:(a) Boiler efficiency(b) Chimney efficiency(c) Economizer efficiency(d) None of the above
At very low-temperature at which melting and boiling point of water becomes equal is:(a) \(233 \mathrm{~K}\)(b) \(273.16 \mathrm{~K}\)(c) \(303 \mathrm{k}\)(d) \(0 \mathrm{~K}\)
The critical pressure at which latent heat of vaporization of water becomes zero is:(a) 225.65 bar(b) 273 bar(c) 100 bar(d) 1 bar
For water, below the atmospheric pressure:(a) Melting point rises slowly and boiling point drops markedly(b) Melting point drops slowly and boiling point rises markedly(c) Melting point rises slowly and boiling point rises markedly(d) None of these
The latent heat of steam at pressure greater than atmospheric pressure than that at atmospheric pressure is:(a) Less(b) More(c) Equal(d) None of these
The saturation temperature of steam with increasing in pressure increases:(a) Linearly(b) First rapidly then slowly(c) Inversely(d) None of these
Heating of dry steam above saturation temperature is known as:(a) Enthalpy(b) Superheating(c) Supersaturating(d) None of these
Superheating of steam is done at:(a) Constant volume(b) Constant pressure(c) Constant enthalpy(d) Constant entropy
The specific volume of steam with increase in pressure decreases:(a) Linearly(b) Slowly first and then rapidly(c) Rapidly first and then slowly(d) Inversely
If \(x_{1}\) and \(x_{2}\) be the dryness fractions obtained in separating calorimeter and throttling calorimeter respectively, then the actual dryness fraction of steam will be:(a) \(x_{1} x_{2}\)(c) \(\left(x_{1}+x_{2}\right) / 2\)(b) \(x_{1}+x_{2}\)(d) \(x_{1} / x_{2}\)
The specific heat of superheated steam in \(\mathrm{kCal} / \mathrm{kg}\) is generally of the order of:(a) 0.1(b) 0.3(c) 0.5(d) 0.8
A wet steam can be completely specified by:(a) Pressure only(b) Temperature only(c) Dryness fraction only(d) Pressure and dryness fraction
On Mollier chart, the constant pressure lines:(a) Diverge from left to right(b) Diverge from right to left(c) First, rise up and then fall (d) None of these
On Mollier diagram, free expansion, or throttling process from high pressure to the atmosphere is represented by:(a) Horizontal straight line(b) Vertical straight line(c) Curved line(d) None of these
Latent heat of dry steam at atmospheric pressure is equal to:(a) \(539 \mathrm{kCal} / \mathrm{kg}\)(c) \(539 \mathrm{BTU} / \mathrm{lb}\)(b) \(539 \mathrm{~kJ} / \mathrm{kg}\)(d) None of these
In throttling process:(a) Entropy remains constant(b) Enthalpy remains constant(c) Pressure remains constant(d) None of these
Water tube boilers produce steam at a _______ pressure than that of fire tube boilers.
For same dimensions and thickness of the tube, a water tube boiler has _______ heating surface than a fire tube boiler.
A _______ in a boiler is used to put off a fire in the furnace when the level of water falls to the unsafe limit.
An equivalent evaporation of a boiler is defined as _______ .
The draught in the locomotive boiler is produced by _______ .
Define dryness fraction and degree of superheat and show their applications in a steam power plant.
Explain the use of steam table and Mollier diagram.
Draw a neat sketch of throttling calorimeter and explain how dryness fraction of steam is determined. What are its limitations?
What are requirements of a good boiler?
Differentiate between (i) Natural circulation and forced circulation in boilers, (ii) Internal fired and external fired boilers, (iii) Fire tube and water tube boilers, and (iv) High-pressure and low-pressure boilers.
Explain very briefly the function of following mountings:(i) Steam stop valve(ii) Feed check valve(iii) Blow-off cock(iv) water level indicator(v) Pressure gauge(vi) Safety valve
State the advantages of high-pressure boilers. Explain the construction and working of Babcock and Wilcox boiler with a neat sketch.
Explain the construction and working of a pressure gauge with a neat sketch.
Explain the working of Cochran boiler and fusible plug with neat sketches.
State the function of following:(i) Fusible plug(ii) Safety valve(iii) Economizer
What is boiler? Discuss Construction and working of Cochran boiler with neat sketch.
Write a short note on Separating calorimeter with its limitations.
Define boiler according to IBR. Classify mountings into safety fittings and control fittings.
Describe the functions of chimney in a boiler.
Name all the mountings and accessories of a steam boiler and describe, with neat sketch, the working of any one of each.
Explain economizer and air-preheater with neat sketch
Show the function and location of the following in the boiler plant:(i) Feed check valve(ii) Air superheater, and(iii) Fusible plug.
Enumerate the advantages and disadvantages of superheated steam.
Explain briefly air preheater, superheater, and chimney with respect to boilers.
Explain with neat sketch and working principle of Lancashire boiler.
A pressure cooker contains 0.5 m3 water and water vapor mixture at 300°C. Calculate the mass of each if their volumes are equal.
Steam flows through a pipe at the rate of 5 kg/s.The pressure and temperature are 12 bar and 300°C, respectively. If 2,000 kJ of heat is lost to the surroundings at constant pressure. Find the final condition of steam.
A container is filled with a saturated steam at 12 bar. The volume of the container is \(1 \mathrm{~m}^{3}\). First, the container is evacuated, then necessary amount of water is filled and evaporated by heating:(a) What mass of water is required and what will be the temperature of water.(b) If the
\(10 \mathrm{~kg}\) of wet steam of quality 0.8 at 5 bar pressure is heated at constant pressure till the temperature rise is \(500^{\circ} \mathrm{C}\). Calculate the amount of energy added as heat.
A boiler of volume \(1 \mathrm{~m}^{3}\) contains wet steam of quality 0.85 at 10 bar. The inlet and outlet valves of the boiler are closed and energy addition as heat is stopped. After some time, the pressure of steam is found 4 bars. Determine:(a) the mass of liquid and vapor in boiler
A pressure cooker contains \(10 \mathrm{~kg}\) of saturated steam at 8 bar. Find the quantity of heat which must be rejected to reduce the quality to \(85 \%\). Determine the pressure and temperature at the new state.
Determine the enthalpy and internal energy of \(1 \mathrm{~kg}\) steam at a pressure of \(10 \mathrm{bar}\), when (i) the dryness fraction of steam is 0.85 , (ii) the steam is superheated to \(300^{\circ} \mathrm{C}\), and (iii) when steam is dry and saturated. Neglect the volume of water and take
Determine dryness fraction of steam supplied to a separating and throttling calorimeter.Water separated in separating calorimeter \(=\) \(0.45 \mathrm{~kg}\)Steam discharged from throttling calorimeter \(=\) \(7 \mathrm{~kg}\)Steam pressure in the main pipe \(=1.2 \mathrm{MPa}\)Barometer reading
A steam generator evaporates \(17,000 \mathrm{~kg} / \mathrm{h}\) of steam at 14 bar and quality of 0.95 from feed water at \(102^{\circ} \mathrm{C}\). When coal is fired at the rate of \(2,050 \mathrm{~kg} / \mathrm{h}\) having a calorific value of \(27,400 \mathrm{~kJ} / \mathrm{kg}\). Assume the
Determine dryness fraction of steam supplied to a separating and throttling calorimeter.Water separated in separating calorimeter \(=0.2 \mathrm{~kg}\)Steam discharged from throttling calorimeter \(=\) \(1.8 \mathrm{~kg}\)Steam pressure in main pipe \(=9\) bar Steam pressure after throttling = \(1
A boiler generates \(7.5 \mathrm{~kg}\) of steam per \(\mathrm{kg}\) of coal burnt at a pressure of 11 bar. The feed water temperature is \(70^{\circ} \mathrm{C}\); boiler efficiency is \(75 \%\); factor of evaporation is \(1.15 ; C_{p}=2.1 \mathrm{~kJ} / \mathrm{kgK}\). Calculate: (i) degree of
What height of chimney is required to produce a draught of \(20 \mathrm{~mm}\) of water column, if \(15 \mathrm{~kg}\) of air is required to burn \(1 \mathrm{~kg}\) of coal? The mean temperature of gas inside the chimney is \(300^{\circ} \mathrm{C}\) and that of atmospheric air is \(35^{\circ}
Calculate the mass of air required to burn per \(\mathrm{kg}\) of coal for chimney height of \(40 \mathrm{~mm}\). Draught produced is \(24 \mathrm{~mm}\) of water. The temperature of flue gas inside the chimney is \(350^{\circ} \mathrm{C}\) and that of the air outside the chimney is \(20^{\circ}
In a boiler observations made were as:Rate of feed water per hour \(=800 \mathrm{~kg}\)Temperature of feed water \(=30^{\circ} \mathrm{C}\)Steam pressure \(=12 \mathrm{bar}\)Quality of steam \(=0.95\)Coal consumption rate per hour \(=100 \mathrm{~kg}\)Calorific value of coal \(=32,000 \mathrm{~kJ}
In a boiler trial observations made are as:Feed water temperature \(=30^{\circ} \mathrm{C}\)Boiler pressure \(\quad=12 \mathrm{bar}\)Dryness fraction of steam \(=0.80\)Coal consumption \(\quad=400 \mathrm{~kg} / \mathrm{h}\)Feed water supplied \(\quad=3,000 \mathrm{~kg} / \mathrm{h}\)Calorific
How much heat is to be added to convert \(4 \mathrm{~kg}\) of water at \(20^{\circ} \mathrm{C}\) in to steam at 8 bar and \(200^{\circ} \mathrm{C}\). Take \(C_{p}\) of superheated steam as \(2.1 \mathrm{KJ} / \mathrm{kg}\) and specific heat of water as \(4.187 \mathrm{KJ} / \mathrm{kg} /
What do you understand by mechanical and thermal efficiency? A steam plant uses 3 tonne of \(\mathrm{coal} / \mathrm{h}\). The steam is fed to turbine the output of which is \(4 \mathrm{MW}\). The calorific value of the coal is 30 \(\mathrm{MJ} / \mathrm{kg}\) calculate the thermal efficiency of
Determine the quality of steam for the following cases:(i) \(P=10\) bar, \(v=0.180 \mathrm{~m}^{3} / \mathrm{kg}\)(ii) \(P=10\) bar, \(t=200^{\circ} \mathrm{C}\)(iii) \(P=25 \mathrm{bar}, h=2,750 \mathrm{~kJ} / \mathrm{kg}\)
Combined separating and throttling calorimeter is used to find out dryness fraction of steam, following readings were taken:Main pressure \(=12\) bar abs.Mass of water collected in separating calorimeter \(=2 \mathrm{~kg}\).Mass of steam condensed in throttling calorimeter \(=20
Determine the quality of steam for the following cases:(i) \(P=10\) bar, \(v=0.180 \mathrm{~m}^{3} / \mathrm{k}\)(ii) \(P=10\) bar, \(t=200^{\circ} \mathrm{C}\)(iii) \(P=25 \mathrm{bar}, h=2,750 \mathrm{~kJ} / \mathrm{kg}\)
Steam at \(1,000 \mathrm{kPa}\) and \(300^{\circ} \mathrm{C}\) enters an engine and expands to \(20 \mathrm{kPa}\). If the exhaust steam has a dryness fraction of 0.9 , make calculations for the drop in enthalpy and change in entropy.
Determine the total heat content per unit mass at the following state using the steam tables. Assume ambient pressure to be \(100 \mathrm{kPa}\) and \(C_{P}\) \(=2.0934 \mathrm{~kJ} / \mathrm{kg}\).(i) 10 bar absolute and \(300^{\circ} \mathrm{C}\)(ii) \(100 \mathrm{kPa}\) gauge and \(100
Determine the specific volume and density of I kg steam at a pressure of \(7 \times 105 \mathrm{~Pa}\), when the condition of steam is: (i) Wet, having dryness fraction 0.9, (ii) Dry, and (iii) Superheated at \(250^{\circ} \mathrm{C}\). If required use the extract of the steam table provided below:
Determine enthalpy and internal energy of \(1 \mathrm{~kg}\) of steam at a pressure of 12 bar when: (i) the dryness fraction of steam is 0.8 , (ii) steam is dry and saturated, and (iii) steam is superheated to \(2,800^{\circ} \mathrm{C}\). Take \(\mathrm{Cps}=2.1 \mathrm{~kJ} / \mathrm{kg}
Calculate the internal energy per \(\mathrm{kg}\) of superheated steam at 10 bar and a temperature of \(300^{\circ} \mathrm{C}\). Find, also change in internal energy if this steam is expanded to 1.4 bar and dryness fraction 0.8 .
where g is the acceleration due to gravity. The projectile will strike the ground when h(t) = 0, which gives the time to hit thit = 2(υ0/g)sinA.Suppose that A = 30°, m/s, and m/s2. Use the MATLAB relational and logical operators to find the times whena. The height is no less than 15 m.b. The

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Introduction To MATLAB For Engineers 3rd Edition William Palm III - Solutions

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