Solve problem 7 Problem # 7. A 25,000 sq ft w.t. boiler produces 320,000 Ib per hour steam at 350 psig, 750 °F from feedat 350 °F. What is the KB rating?Problem # 8. A simple w.t. boiler of 20,000 sq ft heating surface is offered by a salesman for installationin a steam plant where 80,000 lb of d and s steam are to be produced at 190 psig from 210 °F feed water.Using the Bobcock formula verify whether this area is adequate by assuming mass flow 5000 lb per hr persq ft, furnace and chimney temperatures of 1800 and 450 °F.Problem # 11. A 2800 sq ft w.t. boiler is rated at 18,000 lb steam per hour at 100 psig, 0.98 dryness factor.Feed water, 225 °F. Express the capacity as a) kB, b) bo hp, c) percent rating, d) equivalent evaporation.Problem # 13. Testing of a stoker-fired boiler revealed that, during a period when 4550 lb of 12,400 Btucoal were burned, refuse accumulated in the ashpit to the extent of 495 lb, although the coal as firedcontained only 10% ash by analysis. Determine the grate efficiency of this stoker. (No fly ash)

Given data, The rate of steam output, m˙s = 320000 lb/hr Pressure and temperature of the output…

Answered: Problem # 7. A 25,000 sq ft w.t. boiler…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

Nilo
Question 3: A Pelton turbine is a turbine working under atmospheric pressure and which rotates thanks to water hitting its blades (see figure). The operation of the Pelton turbine can be modeled using RTT. Formulate the expression quantifying the forces acting over one blade of the Pelton turbine. You need to consider that the blade moves at a velocity w and the water travels with a velocity v. The water flow and deflector has a diameter d and the flow rate is Q. Disregard gravity and viscosity forces. WATER 5 CA
Design of machine elements solve according to Khurmi Please write clearly
Problem 4: A barge shown in the figure carries 290kN/m and 580KN/m loads. 3m 6m Зт 580 kN/m a. Find the total length, L (m) so that the upward pressure is uniform, and the barge remains horizontal. b. If shear is zero at 5m from the left end, what is the upward pressure in kN/m? c. If the upward pressure is 145kN/m, what is the resulting moment (kN-m) at first point of zero shear? 290 kN/m
From the graph find stress? and yong modulus,E?
A schematic of a homemade hydraulic jack is shown in the figure below, with cylindrical tube ends of different radii, r, = 0.0440 m and r, = 0.120 m, respectively. F A (a) If a downward force of F, = 16.0 N is applied to the end with the smaller radius, how much force F, would the jack exert on a car if it were sitting above the other end? (Enter the magnitude.) N (b) If the smaller piston is pushed down a distance d, = 0.208 m, through what distance d, would the other end move?
Please reply as soon as posible, thanks! I don´t have much time:( Static Problem: The spool shown in the figure has a weight of WAB = 27,50 N , and its center of gravity is located at its geometric center O, the spool has a larger radius R=0,17 and an inner radius r=0,13, and it has a coiled rope. Block C has a uniform weight WC= 60 N. Consider the friction between block C and the top of the spool at A, between the spool and the surface at point B and between the rope and pulley D, the friction coefficients are respectively: μs@A=0,30, μs@B =0,45 and μs@D=0,35. The chord is parallel to the plane. Carry out: a) The free-body diagrams of the block and the reel. b) The calculation of the maximum value of P that can be applied without losing the equilibrium of the system.
A countershaft carrying two V-belt pulleys is shown in the figure. Pulley A receives power from amotor through a belt with the belt tensions shown. The power is transmitted through the shaft anddelivered to the belt on pulley B. Assume the belt tension on the loose side at B is 15 percent ofthe tension on the tight side.(a) Determine the tensions in the belt on pulley B, assuming the shaft is running at a constantspeed.(b) Find the magnitudes of the bearing reaction forces, assuming the bearings act as simplesupports.(c) Draw shear-force and bending-moment diagrams for the shaft. If needed, make one set for thehorizontal plane and another set for the vertical plane.(d) At the point of maximum bending moment, determine the bending stress and the torsionalshear stress.(e) At the point of maximum bending moment, determine the principal stresses and themaximum shear stress.
The first figure gives spring force Fx versus position x for the spring-block arrangement of the second figure. The scale is set by Fs = 190 N. We release the block at x = 13.0 cm. How much work does the spring do on the block when the block moves from x; = +9.0 cm to (a) x = +5.0 cm, (b) x = -5.0 cm, (c) x = -9.0 cm, and (d) x = -11.0 cm? -x (cm) -2 -1 -F, X* = 0 Block attached to spring F = 0 (a) x positive F, negative F (b) x negative F, positive (c)
e The two-steel shaft shown in figure have the same diameter and weight 170 lh cach. Neglect the friction at all contact surfaces and find the reaction of the wall at A on the lower shaft
The mechanical assembly shown in the figureconsists of an aluminum tube, a rigid end plate, andtwo steel cables. The slack is removed from the cablesby rotating the turnbuckles until the assembly is snugbut with no initial stresses. Afterward, the turnbucklesare tightened by 1.5 turns. Calculate the forces inthe tube and the cables and determine the shorteningof the tube. As = 0.85in2 for each cable, AA = 4.5 in2,L = 20 in., Es = 29,000 ksi, EA = 10,600 ksi, andp = 1/16 in.
Please show each and every step while solving. Thanks!

Recommended textbooks for you

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Elements Of Electromagnetics

Mechanical Engineering

ISBN:

9780190698614

Author:

Sadiku, Matthew N. O.

Publisher:

Oxford University Press

Mechanics of Materials (10th Edition)

Mechanical Engineering

ISBN:

9780134319650

Author:

Russell C. Hibbeler

Publisher:

PEARSON

Thermodynamics: An Engineering Approach

Mechanical Engineering

ISBN:

9781259822674

Author:

Yunus A. Cengel Dr., Michael A. Boles

Publisher:

McGraw-Hill Education

Control Systems Engineering

Mechanical Engineering

ISBN:

9781118170519

Author:

Norman S. Nise

Publisher:

WILEY

Mechanics of Materials (MindTap Course List)

Mechanical Engineering

ISBN:

9781337093347

Author:

Barry J. Goodno, James M. Gere

Publisher:

Cengage Learning

Engineering Mechanics: Statics

Mechanical Engineering

ISBN:

9781118807330

Author:

James L. Meriam, L. G. Kraige, J. N. Bolton

Publisher:

WILEY

SEE MORE TEXTBOOKS

Problem # 7. A 25,000 sq ft w.t. boiler produces 320,000 lb per hour steam at 350 psig, 750 °F from feed at 350 °F. What is the KB rating?