Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN: 9781305578296
Author: John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher: Cengage Learning
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Chapter 2, Problem 11RQ
The density of tungsten is 1210 lb/ft3. What would be its specific volume?
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3. The Figure shows the isometric view of a machine component along with the view from above
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How do I solve this task?A spring scale should have a capacity for 10kg. The tension spring is mounted with a weight that is a preload in the spring. Choose a spring with a maximum load of 50mm. What distance should the kg weight be and what the preload weight should weigh.F=Fo+c·fFo= preload weight (N)F=10·9.81 → F=98.1 N Trying with a spring 3823f=F- Fo /c → 98.1-9/1.090=81.74 mm
A gearbox consists of four gears. Dimension the gearbox for a gear ratio of 18:1. The gear ratio should be as even as possible. In the first stage, module 4, in the second stage module 5. All shafts are in the same plane. Calculate the distance between Da. Da=45mm Db=40mmu=ωin/ ωout= nin/ nout= dout/ din= Mout/ Min= Zout/ Zind=m·z)da=m·(z+2) (top diameters)df=m·(z-2.5) (bottom diameters)tooth limits z1 z2 13 13-16 14 14-26 15 15-45 16 16-101 17 17-1314 18 18- .......
Chapter 2 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 2 - Matter is a substance that occupies space and has...Ch. 2 - What are the three states in which matter is...Ch. 2 - ________ is the term used for water when it is in...Ch. 2 - In what direction does a solid exert force?Ch. 2 - In what direction does a liquid exert force?Ch. 2 - Vapor exerts pressure in what direction? A....Ch. 2 - Define density.Ch. 2 - Define specific gravity.Ch. 2 - Describe specific volume.Ch. 2 - Why does an object weigh less on the moon than on...
Ch. 2 - The density of tungsten is 1210 lb/ft3. What would...Ch. 2 - The specific volume of red brass is 0.001865...Ch. 2 - Aluminum has a density of 171 lb/ft3. What would...Ch. 2 - Four pounds of a gas occupy 10 ft3. What would be...Ch. 2 - Why is information regarding the specific volume...Ch. 2 - Whose law states that the volume of a gas varies...Ch. 2 - At a constant pressure, how does a volume of gas...Ch. 2 - Describe Dalton's law as it relates to a confined...Ch. 2 - What are the two types of energy most frequently...Ch. 2 - How were fossil fuels formed?Ch. 2 - Prob. 21RQCh. 2 - Prob. 22RQCh. 2 - If an air-conditioning compressor weighing 300lb...Ch. 2 - Describe horsepower and list the three quantities...Ch. 2 - How many watts of electrical energy are equal to 1...Ch. 2 - How many Btu of heat can be produced by 4 kWh...Ch. 2 - How many Btu/h would be produced in a 12-kW...Ch. 2 - What unit of energy does the power company charge...Ch. 2 - If 3000 ft3 of air is crossing an evaporator coil...Ch. 2 - A gas is compressed inside a compressor's...
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- Q7 (12 Marks) For the system shown in Fig.3: 1- Draw the overall block diagram. 2- Determine the transfer function (Pc(s)/E(s)). Orifice→ Ps Actuating error signs) Flapper Pb+Pb. Nozzle. A X+X+ Ri A I R2 ㅍ think +y Pc+PCarrow_forwardFigures 4: show a pneumatic controller. The pneumatic relay has the characteristic that pc=K pb , where K>0. What kind of control action does this controller produce? a. Derive the mathematical model for the system b. Derive the transfer function Pc(s)/E(s) -Solve step by step Orifice F+Ph R₁ Actuating error signal Flapper Nozzle. x+x F+Pe thinkarrow_forwardThe equation of the turning moment diagram for the three crank engine and the equation of the moment required by a machine connected to this engine are given below: Engine Torque Machine Torque T=10000-500 sin (40) T=10000+2000 sin (20) N.m N.m where radians is the crank angle from inner dead center and the mean engine speed is 300 rpm. It is required to select a proper flywheel (find the moment of inertia of the flywheel in kgm2) and then calculate the power of the engine if the total percentage fluctuation of speed of the flywheel is ±1% of the mean speed. Calculate the angular acceleration of the flywheel when angle is 45°.arrow_forward
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- 12. Figure Q12 shows a prospective design for a conveyor roller system, for transferring crates, one at a time. The system is made up of two parallel rectangular steel beams, built-in at one end and simply supported at the other, with closely spaced rollers mounted in-between, for the crate to pass over. a) Using Macaulay notation, carry out an analysis of the problem and calculate the deflection of the mid-length point of the beams when the crate is centrally located, midway between A and B. State any important assumptions used in your analysis. [20 marks] b) Comment briefly whether this would be the maximum deflection of the beams when the crate is centrally located. 2 m 8 m A Direction of travel Figure Q12 (side view, only one beam visible) Useful information I for each separate beam = 12 ×10 m² E for both beams = 210 GPa Weight of one crate = 800 N [5 marks] Barrow_forward11. A ring (side view shown in Figure Q11) has a circular solid cross-section of 5 mm diameter. The ring itself has a radius of R = 100 mm and a very narrow gap at point A, that allows the two free ends to be pulled apart by forces P, increasing the size of the gap. ○ P A Figure Q11 P a) Show that the total strain energy of the ring due to the applied forces is: U = 3πP²R³ 2EI [12 marks] b) Find the maximum bending stress produced if forces of P = 8 N are applied. [6 marks] c) What minimum force P would cause the material in the ring to yield and at which locations could this yielding begin to occur? Useful information E for the ring material = 75 GPa Oyield for the ring material = 190 MPa [7 marks]arrow_forwardQ2(15 Marks): From Fig. 2, Determine (a) mass equivalent in term x2, (b) stiffness equivalent in term x2, and (c) the natural frequency for the system in term x2. Note: (1) J Cylinder = mcr? J link (2) 2 3 Pulley, mass moment of inertia J Rigid link 1 (mass m₁), rotates with pulley. about O Cylinder, mass m Adherence to the symbols as in the question 152 153 xx(1) Fig. (2) m k₁ nimmunizmu Rigid link 2 (mass m₂)arrow_forward
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