Latest Posted Questions

One challenge I expect is managing unforeseen situations and maintaining flexibility in the implementation of the planned experiences. While I have prepared carefully and have a clear vision for the...
Janet is a new administrator of a small program with 5 classrooms. One of her first issues is reorganizing the closing down procedures at the end of each day. In this program, the teachers are...
Imagine you are a dedicated employee working with XYZ corporation. You consistently exceed your targets and actively support your colleagues. You receive positive feedback from clients and your team...
Discuss a guidance for managers to use when discussing security requirements for remote work with their subordinates. Please address security practices which remote workers should be required to...
1. Compare rational decision making with the two models of non-rational decision making. 2. How would an organization implement evidence-based decision making? Why could this be hard to do? 3....
1. Indicate and explain 2 key features of recruitment policies and/or procedures 2.Indicate and explain 2 key features of selection policies and/or procedures 3.Indicate and explain 2 key features of...
Review the module resources on critiquing research articles. Then in your initial discussion post, write a critique of the article you chose. Answer the following questions in your critique:...
I would like to design measurements to evaluate our management team for bonus purposes. As a starting point, I have been looking at metrics for our three product lines. I have attached some...
Consider the 5 key functions of leadership and management roles and responsibilities listed in the table below. Read each question carefully. Your answers should follow the suggested word count for...
what is the historical background of the emerging IT or IT ENABLED APPROACHES What is the technical background analysis of the emerging IT WHAT ARE THE USE CASES Assess the potential impacts of...
What is your initial observation and reaction to this video case? Was the response of the female co-worker, victim resonable given the situation? Why or why not? Could she have handled this...
What do you need to work on to improve yourself if you are to work in an organization? How can you benefit from the change management concepts and topics you have learned throughout this course and...
See the video and help me to summary https://www.youtube.com/watch?v=sK-AW2ExST8 Your summary must include: - What was the main idea? - How you are going to keep your associates motivated, engaged...
The root mean square speed of ????2 molecules at 25 degrees Celsius is about 1.6 km/s. What is the root mean square speed of an ????2 molecule at 25 degrees Celsius?
The inverse of the collision rate, 1/z, is the average time between collisions of gas particles. Calculate the average time between collisions of an Xe atom in 1.00 mol of Xe at STP.
Crane Company sells goods to Ivanhoe Company during 2025. It offers Ivanhoe the following rebates based on total sales to Ivanhoe. If total sales to Ivanhoe are 9,500 units, it will grant a rebate of...
An isolated conducting sphere of radius 1 0 cm , initially uncharged, is illuminated by ultraviolet light of wavelength 2 0 0 nm . What charge will the photoelectric effect induce on the sphere? The...
Marco Company shows the following costs for three jobs worked on In April. Job: 306 Job 307 Job 308 Balances on March 31 Direct materials used (in March). Direct labor used (in March) $ 30,200 $...
The equity sections for Atticus Group at the beginning of the year (January 1) and end of the year (December 31) follow. Stockholders' Equity (January 1) 5 Common stock-$4 par value, 100,000 shares...
Ling Company has two departments, Assembly and Finishing. Consider the following data for the Assembly Department: Direct Units Beginning work in process 2,700 % Complete Material 90% Direct Labor...
Paula is considering the purchase of a new car. She has narrowed her search to two cars that are equally appealing to her. Car A costs $28,000, and Car B costs $28,200. The manufacturer of Car A is...
Alden Company's monthly data for the past year follow. Management wants to use these data to predict future variable and fixed costs. Month Units Sold Total Cost Month Units Sold Total Cost 1 321,500...
The equity sections for Atticus Group at the beginning of the year (January Stockholders' Equity (January 1) Common stock-$4 par value, 100,000 shares authorized, 40,000 shares issued and outstanding...
Data for Hermann Corporation are shown below: Selling price Variable expenses Contribution margin Percent of Per Unit $ 125 80 Sales 100% 64 $ 45 36% Fixed expenses are $85,000 per month and the...
The properties of water and steam become identical at (a) 0.1 bar (b) 1 bar (c) $100 \mathrm{bar}$ (d) 212.2 bar.
Steam from an engine exhaust at 1.25 bar flows steadily through an electric calorimeter and comes out at $1 \mathrm{bar}, 130^{\circ} \mathrm{C}$. The calorimeter has two $\mathrm{kW}$ heaters...
In thermodynamic analysis, a pure substance is that which (a) Consists of only a single chemical species (b) has no dissolved impurities (c) may have a number of chemical species but the composition...
A closed vessel having a volume of $2.84 \mathrm{~m}^{3}$ contains $1.365 \mathrm{~kg}$ of mixture of water and steam at a pressure of 7 bar. Find how much heat must be added to the vessel to...
In steam tables, the entropy is shown as zero for (a) saturated vapour at atmospheric pressure (b) saturated liquid at atmospheric pressure (c) saturated vapour at $0^{\circ} \mathrm{C}$ (d)...
Water equivalent of calorimeter is given by (a) $\frac{m_{c a l} \times c_{p c}}{c_{p w}}$ (b) $\frac{m_{c a l}}{c_{p w}}$ (c) $\frac{m_{c a l}}{c_{p c}}$ (d) \(\frac{m_{c a l} \times c_{p...
What is the yield to maturity of a 23-year bond that pays a coupon rate of 8.25% per year, has a $1,000 par value , and is currently priced at $1,298.05?
The performance of a boiler is measured by (a) Amount of water evaporated/hr (b) Steam produced in kg/hr (c) All of the above (d) None of above
Describe the construction features of a Lancashire boiler. How superheated steam can be produced with this boiler?
A rigid vessel is initially divided into two parts $A$ and $B$ by a thin partition. Part $A$ contains $1 \mathrm{~kg}$ of steam at 4 bar, dry and saturated, and part $B 2 \mathrm{~kg}$ of...
With the help of a neat sketch describe a Loeffler boiler. What is usually the working pressure of such a boiler?
The following observations were made during a boiler trial: Calculate (a) equivalent evaporation per $\mathrm{kg}$ of fuel per $\mathrm{m}^{2}$ of heating surface area per hour, (b) boiler...
A steam generator delivers steam at 140 bar and $500^{\circ} \mathrm{C}$. The feed water inlet temperature $=170^{\circ} \mathrm{C}$. The steam generation rate is \(110,000 \mathrm{~kg} /...
List the requirements of a good boiler.
Calculate enthalpy and entropy for $5 \mathrm{~kg}$ of steam at 8 bar under the following conditions: (a) dry and saturated, (b) wet steam having wetness of $40 \%$, and (c) superheated steam at...
Draw a schematic flow diagram of a modem steam generator. Discuss the installation of connection and radiation superheaters and their exit temperature response with varying steam flow.
Determine the quality of steam for the following cases: (a) $p=10$ bar, $v=0.180 \mathrm{~m}^{3} / \mathrm{kg}$ (b) $p=10$ bar, $t=200^{\circ} \mathrm{C}$ (c) $p=25$ bar, \(h=2750...
What are the functions of boiler accessories ?
What are saturation states ?
At triple point of a pure substance (a) liquid and vapour exist together (b) solid and liquid exist together (c) solid and vapour exist together (d) solid, liquid and vapour phases exist together
A rigid vessel of volume $0.86 \mathrm{~m}^{3}$ contains $1 \mathrm{~kg}$ of steam at a pressure of 2 bar. Calculate the specific volume, temperature, dryness fraction, internal energy, enthalpy,...
A rigid closed tank of volume $3 \mathrm{~m}^{3}$ contains $5 \mathrm{~kg}$ of wet steam at a pressure of $200 \mathrm{kPa}$. The tank is heated until the steam becomes dry saturated. Find the...
What is the triple point?
A pure substance above critical temperature exists as (a) solid (b) liquid (c) vapour (d) superheated liquid
Water at $40^{\circ} \mathrm{C}$ is continuously sprayed into a pipe line carrying 5 tonnes per hour of steam at $5 \mathrm{bar}, 300^{\circ} \mathrm{C}$. At a section downstream where the...
Partial pressure of a component in a mixture is (a) the average of pressure of all the components (b) the total pressure minus its own pressure (c) the pressure exerted by the component (d) the...
A sample of steam from a boiler drum at $3 \mathrm{MPa}$ is put through a throttling calorimeter in which the pressure and temperature are found to be $0.1 \mathrm{MPa}, 120^{\circ} \mathrm{C}$....
What is the critical state ?
Triple point temperature and pressure for water are (a) $1^{\circ} \mathrm{C}$ and 1 ata (b) $0^{\circ} \mathrm{C}$ and 1 ata (c) $0^{\circ} \mathrm{C}$ and 0.006028 ata (d) \(0.01^{\circ}...
Explain degree of subcooling and degree of superheat.
The slope of the sublimation curve on $p-T$ diagram for all substances is (a) zero (b) positive (c) negative (d) variable.
Two streams of steam, one at $2 \mathrm{MPa}, 300^{\circ} \mathrm{C}$ and the other at $2 \mathrm{MPa}, 400^{\circ} \mathrm{C}$, mix in a steady flow adiabatic process. The rates of flow of the...
Define normal boiling point.
Define dryness fraction of steam.
Sublimation is the process of (a) changing from solid phase to vapour phase directly (b) changing from liquid phase to vapour phase (c) supersaturation of vapour (d) changing from solid phase to...
Two insulated tanks, $A$ and $B$, are connected by a valve. Tank $A$ has a volume of $0.70 \mathrm{~m}^{3}$ and contains steam at $1.5 \mathrm{bar}, 200^{\circ} \mathrm{C}$. Tank $B$ has...
A cylinder fitted with a piston contains $2 \mathrm{~kg}$ steam at $500 \mathrm{kPa}, 400^{\circ} \mathrm{C}$. Find the entropy change and the work done when the steam expands to a final pressure...
What do you mean by phase of a substance?
The process of sublimation is found to occur in (a) liquid $\mathrm{N}_{2}$ (b) solid $\mathrm{CO}_{2}$ (c) solid $\mathrm{O}_{2}$ (d) air
A mass of wet steam at $165^{\circ} \mathrm{C}$ is expanded at constant quality 0.8 to 3 bar. It is then heated at constant pressure to a degree of superheat of $66.5^{\circ} \mathrm{C}$. Find...
$1 \mathrm{~kg}$ of steam sample contains $0.8 \mathrm{~kg}$ steam. Its dryness fraction is (a) 0.2 (b) 0.8 (c) 0.9 (d) 0.5
Steam at a pressure of 7 bar and 0.95 dry is supplied to a heater through a pipe of $25 \mathrm{~mm}$ internal diameter. The velocity of steam in the pipe is $12 \mathrm{~m} / \mathrm{s}$. Water...
Explain the term sublimation.
When a vapour condenses into a liquid (a) its temperature rises (b) its temperature falls (c) it evolves heat (d) it absorbs heat
Define dryness fraction and wetness of steam.
If $x_{1}$ and $x_{2}$ are the dryness fractions obtained in separating calorimeter and throttling calorimeter respectively, then the actual dryness fraction of steam is (a) $x_{1} x_{2}$ (b)...
A combined separating and throttling calorimeter recorded the following observations : Pressure in the steam main $=15$ bar Mass of water drained from the separate $=0.55 \mathrm{~kg}$ Mass of...
Define latent heat of fusion and latent heat of vaporisation.
What is quality of steam ?
In a separating and throttling calorimeter the total quantity of steam passed was $40 \mathrm{~kg}$ and $2.2 \mathrm{~kg}$ of water was collected from the separator. Steam pressure before...
Suppose the exchange rate between U.S. dollars and Swiss francs is SF 1.112 = $1.00, and the exchange rate between the U.S. dollar and the euro is $1.00 = 0.9842 euros. What is the cross-rate of...
Consider the following statements about critical point of water : 1. The latent heat is zero. 2. The liquid is denser than its vapour. 3. Steam generators can operate above this point. Of these...
A vessel containing $5 \mathrm{~kg}$ of steam at $8 \mathrm{bar}, 250^{\circ} \mathrm{C}$ is cooled by pouring water over the outer surface till the inside pressure falls to 5 bar. Calculate...
Write expressions for internal energy of steam when it is wet and when it is superheated.
The mass of water and steam collected in 15 minutes in a separating and throttling calorimeter are $1.2 \mathrm{~kg}$ and $4.8 \mathrm{~kg}$ respectively. The dryness fraction is (a) $50 \%$...
What is a Mollier diagram ?
A liquid is boiling in a airtight vessel. Using an exhaust tube the vapour is pumped out at a faster rate. What will happen to the liquid? (a) Temperature will go down but boiling will continue (b)...
A cylinder fitted with a movable piston contains $1 \mathrm{~kg}$ of steam at an initial pressure of $6 \mathrm{bar}$ and of volume $0.26 \mathrm{~m}^{3}$. Determine the dryness fraction of...
Write expressions for entropy of steam for wet and superheated.
In a barrel calorimeter, $5 \mathrm{~kg}$ of steam is sampled at 7 bar. The water equivalent of calorimeter at $20^{\circ} \mathrm{C}$ is $10 \mathrm{~kg}$. The barrel contains \(140...
When steam is heated at constant volume and its end condition is still wet, what is heat transfer?
Steam coming out of the whistle of pressure cooker is (a) Dry saturated vapour (b) Wet vapour (c) Superheated vapour (d) Ideal gas
A rigid metallic vessel is divided into two parts by a partition. Part $A$ contains $1 \mathrm{~kg}$ of steam at 3.4 bar dry and saturated. Part $B$ contains $2 \mathrm{~kg}$ of steam at 6.8...
In the wet region, constant temperature process is also a constant pressure process. Say true or false.
At its critical point, any substance will (a) exist in all the three phases simultaneously (b) change directly from solid to vapour (c) lose phase distinction between liquid and vapour (d) behave as...
What remains constant during isentropic process ?
A system is said to be consisting of a pure substance when (a) it is homogeneous in composition (b) it is homogeneous and invariable in chemical aggregation (c) it has only one phase (d) it has more...
5 kg of steam at $14 \mathrm{bar}, 280^{\circ} \mathrm{C}$ expands to $1.4 \mathrm{bar}$ according to the law $p v^{1.25}=$ constant. Calculate $(a)$ the final temperature, $(b)$ the work...
Hyperbolic process is also an isothermal process in the super heat region. Say true or false.
Steam at $10 \mathrm{bar}, 240^{\circ} \mathrm{C}$ is cooled under constant pressure until the steam becomes 0.8 dry. Find (a) the work done, change in enthalpy and heat transfer if the process is...
What is throttling of steam ?
For a mixture of solid, liquid and vapour phases of a pure substance, in equilibrium, the number of independent intrinsic properties needed will be (a) 0 (b) 1 (c) 2 (d) 3
Steam enters a turbine at $700 \mathrm{kPa}, 250^{\circ} \mathrm{C}$ and exhausts at $15 \mathrm{kPa}$. The efficiency of the turbine is 0.8. Calculate (a) the power output per $\mathrm{kg}$ of...
For a pure substance at its triple point, the number of degrees of freedom is (a) 0 (b) 1 (c) 2 (d) none of the above
A spherical vessel of $0.4 \mathrm{~m}^{3}$ capacity contains $2 \mathrm{~kg}$ of wet steam at a pressure of $600 \mathrm{kPa}$. Calculate (a) the volume and mass of liquid, and $(b)$ volume...
What are the drawbacks of barrel calorimeter ?
Distinguish between gas and vapour.
Superheating of steam is done at constant (a) volume (b) pressure (c) temperature (d) enthalpy
Steam enters a turbine at $10 \mathrm{bar}, 300^{\circ} \mathrm{C}$ with a velocity of $50 \mathrm{~m} / \mathrm{s}$. The steam leaves the turbine at 1.5 bar with a velocity of \(200 \mathrm{~m}...
Which calorimeter is used for a very wet steam ?
Differentiate between wet, dry saturated and superheated steam.
With the increase of pressure the enthalpy of evaporation of water (a) decreases (b) increases (c) remains same (d) changes randomly
A vessel of $1.35 \mathrm{~m}^{3}$ capacity is filled with steam at 13 bar absolute and $95 \%$ dry. The vessel and its contents cool until the pressure is 2 bar absolute. Calculate the mass of...
Steam at a pressure of 20 bar absolute and dryness fraction 0.8 is throttled to a pressure of 0.5 bar. Determine the final condition of steam.
Explain the term internal energy of steam.
Only throttling calorimeter is used for measuring (a) very low dryness fraction upto 0.7 (b) very high dryness fraction upto 0.98 (c) dryness fraction of only low pressure steam (d) dryness fraction...
Steam at a pressure of 5 bar and temperature $200^{\circ} \mathrm{C}$ is expanded adiabatically to a pressure of 0.7 bar absolute. Determine the final condition of steam. For superheated steam,...
Specific volume of wet steam with dryness fraction $x$ is (a) $x v_{f}$ (b) $x v_{g}$ (c) $x^{2} v_{g}$ (d) $x^{3} v_{g}$
2 kg of wet steam at $10 \mathrm{bar}$ and $90 \%$ dry is expanded according to the law $p v=$ const. to a pressure of 1 bar. Determine the final condition of steam and the change in internal...
Why steam is superheated ?
Constant pressure lines in the superheated region of the Mollier diagram have (a) a positive sloped (b) a negative slope (c) zero slope (d) both positive and negative slope
Explain the volume changes during formation of steam with the help of T-V diagram.
Enthalpy of superheated steam is given by (a) $h_{g}+c_{p s} \ln \frac{\mathrm{T}_{\text {sup }}}{\mathrm{T}_{s}}$ (b) $h_{f}+h_{f g}$ (c) $s_{g}+x s_{f g}$ (d) $x s_{f}$
While conducting the dryness fraction test with a throttling calorimeter, it was found that the entering steam was at a pressure of 12 bar and a sample after being reduced to $1 \mathrm{bar}$ in...
Describe the process of formation of steam on T-Q diagram.
Use the following information for the Lowell, Inc. for this and the next two questions. Sales $200,000 Debt 95,000 Dividends 5,000 Equity 40,000 Net income 16,000 1.What is the company's...
Determine the change in internal energy when one $\mathrm{kg}$ of steam expands from $10 \mathrm{bar} 300^{\circ} \mathrm{C}$ to 0.5 bar and 0.9 dry. Take \(c_{p s}=2.1 \mathrm{~kJ} /...
What do you understand by the term priming ?
Entropy of wet steam is given by (a) $s_{f}+x s_{f g}$ (b) $x s_{g}$ (c) $s_{g}+s_{f g}$ (d) $x s_{f}$
In a test with a separating and throttling calorimeter, the following observations were made : Water separated $=2.04 \mathrm{~kg}$ Steam discharged from throttling calorimeter \(=20.6...
One $\mathrm{kg}$ of steam at 10 bar exists at $200^{\circ} \mathrm{C}$ Calculate the enthalpy, specific volume, density internal energy and entropy. Take \(c_{p s}=2.1 \mathrm{~kJ} /...
State limitations of throttling calorimeter.
Entropy of $1 \mathrm{~kg}$ of water at $T K$ is given by (a) $c_{p w} \ln \frac{\mathrm{T}}{273}$ (b) $c_{p w} \log \frac{\mathrm{T}}{273}$ (c) $c_{p w} \ln \frac{\mathrm{T}}{273}$ (d)...
Steam at 10 bar and 0.9 dry initially occupies $0.35 \mathrm{~m}^{3}$. It is expanded according to the law $p v^{1.25}=$ const until the pressure falls to 2 bar. Determine (a) the mass of steam...
A cylinder fitted with a piston contains $0.5 \mathrm{~kg}$ of steam at 4 bar. The initial volume of steam is $0.1 \mathrm{~m}^{3}$. Heat is transferred to steam at constant pressure until the...
A vessel contains one $\mathrm{kg}$ of steam which contains $\frac{1}{3} \mathrm{rd}$ liquid and $\frac{2}{3} \mathrm{rd}$ vapour by volume. The temperature of steam is \(151.86^{\circ}...
John Adams plans to retire at the age of 62. He wants an annual income of $60,000 per year. John is currently 45 years of age. How much does he have to place at the beginning of each year into a...
(a) Explain the terms : melting point, boiling point and critical point. (b) State the difference between (i) Superheated steam and wet steam. (ii) Sensible heat of water and latent heat of...
A separating and throttling calorimeter was used to determine the dryness fraction of steam flowing through a steam main at $900 \mathrm{kPa}$. The pressure and temperature after throttling was...
A throttling calorimeter is used to measure the dryness fraction of steam in the steam mass where the steam is flowing at a pressure of 6 bar. The steam after passing through the calorimeter comes...
One $\mathrm{kg}$ of steam at 8.5 bar and 0.95 dry expands adiabatically to a pressure of $1.5 \mathrm{bar}$. The law of expansion is $p v^{1.2}=$ const. Determine (a) the final dryness...
What is a steam generator ?
Which of the following are boiler accessories ? (a) Safety valve (b) Stop valve (c) Economiser (d) Blow-off cock
Calculate the quantity of the required to generate $1 \mathrm{~kg}$ of steam at a pressure of 8 bar from water at $30^{\circ} \mathrm{C}$ (a) when dryness fraction is 0.9 , (b) when steam is just...
(a) Explain with a neat sketch working of a separating and throttling calorimeter. (b) Explain the following terms : dryness fraction, priming, superheated steam.
5400 m 3 /h of wet steam 0.92 dry and at 10 bar is to be supplied by a boiler for a processing plant. Calculate (a) the mass of steam supplied per hour, and (b) the quantity of coal of calorific...
Describe the construction features of a Cochran boiler. Discuss its working briefly.
How do you classify steam generators ?
The following readings are taken during trial on a boiler for one hour : Calculate (a) equivalent evaporation per $\mathrm{kg}$ of fuel without and with superheater, (b) thermal efficiency of the...
Assume that four years and one month from today you plan to make the first of several annual withdrawals from an account. Your first withdrawal will equal $1000. You plan for these withdrawals to...
Where a water tube boiler is exclusively used ? Discuss the construction and working of Babcock and Wilcox boiler.
What are the merits of water tube boilers ?
The main objective of a boiler tail is (a) to determine the thermal efficiency of the boiler when working at a definite pressure (b) to draw up heat balance sheet for the boiler (c) both (a) and (b)...
The following data refer to a boiler trial: Calculate (a) boiler efficiency, (b) equivalent evaporation, and (c) percentage heat unaccounted Feed water Feed water temperature Steam pressure Steam...
What are the demerits of fire tube boilers ?
Economiser is generally placed between (a) last superheater/preheater and air preheater (b) air preheater and chimney (c) electrostatic precipitators (d) induced draft fan and forced draft fan
Find the internal energy of $1 \mathrm{~kg}$ of super heated steam at a pressure of 10 bar and $300^{\circ} \mathrm{C}$. If this steam is expanded to 1.5 bar and 0.9 dryness, find the change in...
At tempering is (a) reduction of steam pressure (b) reduction of steam temperature (c) discharge of flue gases at certain height (d) conditioning of disposable fluids for minimum pollution
The air preheater of a boiler plant is located (a) between forced draught fan and furnace (b) between furnace and economiser (c) between economiser and chimney (d) near superheater
The following type of safety valve is most suitable for locomotive boiler (a) Dead weight safety valve (b) Spring loaded safety valve (c) Lever loaded safety valve (d) None of the above
1 kg of steam 0.85 dry at a pressure of 1 bar is compressed in a cylinder to a pressure of 2 bar according to p $v^{1.25}=$ const. Determine the final condition of steam and the heat transfer...
What are the advantages of high pressure boilers ?
With the help of a neat sketch discuss the working principle of Velox high pressure boiler.
In a boiler test $1200 \mathrm{~kg}$ of coal is burnt in 24 hours. The mass of water evaporated is $12,500 \mathrm{~kg}$. Steam pressure is $7.6 \mathrm{bar}$. The feed water temperature was...
Enumerate the factors affecting boiler selection.
In a boiler trial, $1360 \mathrm{~kg}$ of coal were consumed in 24 hours. The mass of water evaporated was $13600 \mathrm{~kg}$ and steam pressure was $7.5 \mathrm{bar}$. The feed water...
A boiler produces $10 \mathrm{~kg}$ of steam $/ \mathrm{kg}$ of coal burnt at $50^{\circ} \mathrm{C}$. The steam pressure is 10 bar. Find the equivalent evaporation from and at \(100^{\circ}...
A boiler produces $900 \mathrm{~kg}$ of wet steam per hour at a pressure of 7 bar. The dryness fraction of steam is 0.96 . Feed water temperature is $20^{\circ} \mathrm{C}$. If boiler efficiency...
List the advantages of forced circulation boilers.
The manhole provided in a fire tube boiler is used for (a) Inspecting the drum when the boiler is in operation (b) Inspecting the drum when the boiler is shutdown (c) Inspecting the drum and clean...
Steam at a pressure of 10 bar and 0.9 dry expands to 1 bar hyperbolically. Find (a) work done and heat absorbed, (b) internal energy and change in enthalpy. Take specific heat of steam at constant...
What is a boiler mounting ? List the various boiler mountings ?
Consider the following statements: Blow down is necessary on boilers, because 1. the boiler water level is lowered rapidly in case it accidentally rises too high. 2. the precipitated sediment of...
Steam initially dry saturated, expands isentropically from pressure of 15 bar to 0.15 bar. Find the index of isentropic expansion.
A boiler generates $8.5 \mathrm{Kg}$ of steam per $\mathrm{kg}$ of coal burned at a pressure of $13.5 \mathrm{bar}$ from feed water having absolute temperature of $350 \mathrm{~K}$. The...
A device whose function is to heat feed water by utilizing the heat in the exhaust flue gases before leaving through the chimney is called (a) Superheater (b) Economiser (c) Air preheater (d) Feed...
A boiler produces $15000 \mathrm{~kg} / \mathrm{h}$ of steam at 7 bar, $300^{\circ} \mathrm{C}$. The feed water temperature is $70^{\circ} \mathrm{C}$. The calorific value of fuel \(=30,000...
The data obtained during a boiler trial is given below: Calculate (a) equivalent evaporation, (b) thermal efficiency of plant, and (c) percentage of heat energy of fuel energy utilised by the...
3 kg of steam at a pressure of 30 bar exists in the following conditions : (a) wet steam with a dryness fraction of 0.85. (b) superheated steam with temperature of $300^{\circ} \mathrm{C}$. Assume...
A boiler generates $8 \mathrm{~kg} / \mathrm{kg}$ of coal burnt at a pressure of 10 bar. The feed water temperature is $70^{\circ} \mathrm{C}, \eta_{\text {boiler }}=75 \%$ and factor of...
The following data relate to a boiler trial : Ultimate mass analysis of dry coal : $\mathrm{C}=84 \%, \mathrm{O}_{2}=4 \%$, ash $=8 \%$ Coal burnt per hour Moisture content in coal H.C.V. of coal...
Name the various accessories used on a boiler.
A device which is used for pumping water in to the boiler is called (a) Economiser (b) Feed pump (c) Injector (d) Air preheater
If I borrowed 15,000 in student loans at an annual interest of 7%. and then repay $1800 per year, then how long will it take me to repay the loan?
An investment offers the following cash flows: $554 today, $182 one year from now, $482 in 2 years, and $793 in 3 years. If the relevant interest rate is 7% per year (an APR, with interest compounded...
What is the internal rate of return (IRR) for a project that costs $5,500 and is expected to generate $1,800 per year for the next four years? If the firm's required rate of return is 8 percent, what...
Assume B Corporation has $375,000 of Ordinary Income from its operations, $75,000 of interest received from its investments on bonds from Z firm. Also, it received $50,000 of dividends from a...
Historically, McCullough has used one predetermined overhead rate based on the number of patient-days (each night that a patient spends in the hospital counts as one patient-day) to allocate overhead...
(a) (b) Explain the differences between a consignment and a sale. 100 cases of goods costing 3,500 were sent on consignment by X Limited to Y Limited on 1 February 19X7. At the same time, X Limited...
Three point charges are placed on the x-axis. A charge of +2.0 C is placed at the origin, -2.0 C to the right at x = 50 cm, and +4.0 C at the 100 cm mark. What are the magnitude and direction of the...
Job OL1105 was recently completed. The following data have been recorded on its job cost sheet: Direct materials $2,429 Direct labor-hours 74 labor-hours Direct labor wage rate Machine-hours $ 17 per...
You are a manager at Northern Fibre, which is considering expanding its operations in synthetic fibre manufacturing. Your boss comes into your office, drops a consultant's report on your desk, and...
The following transactions occurred during a recent year: a. Paid wages of $550 for the current period (example). b. Borrowed $2,750 cash from local bank using a short-term note. c. Purchased $1,100...
Anna is reviewing a new 5-year project with expected sales of 3,400 units, give or take 8%. The expected variable cost per unit is $22 and the expected fixed costs are $47,500. Cost estimates are...
A bond issued by a corporation on September 1, 1989 is scheduled to mature on September 1, 2045. If today is September 2, 2009, what is this bond's time to maturity?
You want to buy a car and can afford $300 monthly payments and have $2,500 in hand to make as a down payment. Car dealer has an advertisement for a 60-month loan with 4.99 percent interest. How much...
You found an investment that will pay $250 a month and payments will grow at 1 percent. How much would you pay for such an investment if your discount rate is 4 percent?
Jim Daniels Health Products has eight stores. The firm wants to expand by two more stores and needs a bank loan to do this. Mr. Hewitt, the banker, will finance construction if the firm can present...
A project has the following cash flows : year cash flows 0 -10,700 1 4,510 2 6,460 3 4,000 4 -1,840 Assuming the appropriate interest rate is 9...
Calculate the price of a zero coupon bond that matures in 7 years if the market interest rate is 4 percent. Assume semi-annual interest payments and $1,000 par value.
A firm reported year-end sales of $20 million. It listed $7 million of inventory on its balance sheet. Using a 365-day year, how many days did the firm's inventory stay on the premises?
Apple bonds (each with a $1,000 face value and a 3.25% coupon rate) that are five years from their 10-year maturity date. how would I calculate the bond value?
Braverman Company has two manufacturing departments-Finishing and Fabrication. The predetermined overhead rates in Finishing and Fabrication are $26.00 per direct labor-hour and 120% of direct...
You are looking at purchasing a home and would like to obtain $100,000 mortgage amortized over 25 years. The current interest rate on a 3-year term is 7% compounded semi-annually. What will your...
Beatrice invests $1,320 in an account that pays 4 percent simple interest. how much more could she have earned over a 5-year period if the interest had been compounded annually?
Farns Corp.'s bonds currently sell for $1,302.40 and have a $1,000 par value. They have a 6.25% annual coupon rate and a 10-year maturity. What is the bond's yield to maturity?

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