Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
10th Edition
ISBN: 9781337399128
Author: Russell E. Smith
Publisher: Cengage Learning
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Chapter 5, Problem 10RQ
A three-pole contactor would allow how many paths for current flow?
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determine the heat loss and heat transfer requirements for an air conditioningsystem in a storage room.
Steps:1. Collect Data: Review the Technical Specifications Document for details like storage roomdimensions, wall thickness, and materials. Use the ASHRAE CLIMATIC DESIGN CONDITIONS tocollect local data.2. Calculate Room Surface Area: Determine the total surface area of the storage room,accounting for walls and ceiling. Assume that the floor is well insulated and that heat transferwithin the floor is negligible.3. Assess Insulation: Evaluate the insulation thickness and material properties.4. Calculate Heat and Ventilation Loads (Heat Loss Calculations): In general, heat loadcalculations include several components, such as internal equipment, lighting, and heat gainsfrom external sources. For this project, identify and quantify the main heat loads affecting therefrigeration system, focusing specifically on:• Heat gains from the outside environment (through walls, doors, and ceiling)•…
A simply supported beam with a square cross section under two concentrated loads is shown in Figure 2. The beam has a roller support at the left end A and a pin support at the right end B. The material of the beam is considered to be Alloy Steel.
determine the reaction forces and plot the shear force and bending moment diagrams
25 mm
10 mm
250 mm
a
15 mm
250 mm
0.3 m
(300 mm)
A
n
65 kN 90 kN 65 kN
B
PROBLEM 6.11
For the beam and loading shown,
consider section n-n and determine (a)
the largest shearing stress in that section,
(b) the shearing stress at point a.
15 mm
0.6 m
0.6 m
0.6 m 0.6 m
Chapter 5 Solutions
Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
Ch. 5 - What are the three types of electrical diagrams...Ch. 5 - A load is an electrical device that __________. a....Ch. 5 - What is the major load of an air-conditioning...Ch. 5 - Identify the following symbols for loads:Ch. 5 - Prob. 5RQCh. 5 - What do the terms normally open and normally...Ch. 5 - What is the difference between a magnetic starter...Ch. 5 - Prob. 8RQCh. 5 - Draw a heating and a cooling thermostat and...Ch. 5 - A three-pole contactor would allow how many paths...
Ch. 5 - A disconnect switch is used to __________. a. open...Ch. 5 - What determines whether a pressure switch opens or...Ch. 5 - Identify the following symbols for...Ch. 5 - What is the difference between a thermal overload...Ch. 5 - What is the purpose of a transformer? Draw the...Ch. 5 - Which of the following is not a requirement for an...Ch. 5 - What is the purpose of a legend on a schematic...Ch. 5 - A factual diagram is _____. a. a pictorial diagram...Ch. 5 - Identify the following symbols for safety devices.Ch. 5 - Prob. 20RQCh. 5 - True or False: The schematic diagram tells service...Ch. 5 - What is the difference between a pilot duty and a...Ch. 5 - What type of switch would be used to open or close...Ch. 5 - What is the purpose of a fuse in an electrical...Ch. 5 - True or False: A solenoid valve is a device that...Ch. 5 - What is a signal light used for in a control...Ch. 5 - Change the following normally open elements from...Ch. 5 - Draw the symbols for the following electrical...Ch. 5 - Add letter designations to the symbols to indicate...Ch. 5 - Draw a symbol for a magnetic starter.
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- A 000 RA 1.8 m P W610 X 155 C B 2.7 m- RC PROBLEM 6.17 For the wide-flange beam with the loading shown, determine the largest load P that can be applied, knowing that the maximum normal stress is 165 MPa and the largest shearing stress using the approximation T = VIA web is 100 MPa.arrow_forwardPROBLEM 6.31 The built-up beam shown is made up by gluing together five planks. Knowing that the allowable average shearing stress in the glued joints is 400 kPa, determine the largest permissible vertical shear in the beam. 50 mm 100 mm 50 mm 125 50 125 mm mm mmarrow_forward32 mm 32 mm с b 32 mm 32 mm a PROBLEM 6.40 The extruded beam shown has a uniform wall thickness of 3 mm. Knowing that the vertical shear in the beam is 9 kN, determine the shearing stress at each of the five points indicated.arrow_forward
- PROBLEM 6.39 6.39 The vertical shear is 5.3 kN in a beam having the cross section shown. Determine (a) the distance d for which Ta Tb, (b) the corresponding shearing stress at points a and b. = 12 mm |d→←125. mm 200 mm 12 mm b d. 100 mmarrow_forward100 kN 100 kN In A In 500 m 250 m 500 m B ΤΟΠΟΙΟΣ 180 mm 20 mm b 38 mm a -200 mm $381 mm 20 mm PROBLEM 6.23 For the beam and loading shown in Problem 6.22, determine the largest shearing stress in section n-n. PROBLEM 6.22 For the beam and loading shown, consider section n-n and determine the shearing stress at (a) point a, (b) the shearing stress at point b. 20 mm→ karrow_forward100 kN In A n 100 kN 0.5 m 0.5 m 0.25 m 20 mm 180 mm b B a 000 20 mm- 38 mm 38 mm PROBLEM 6.21 For the beam and loading shown, consider section n-n and determine the shearing stress at (a) point a, (b) the shearing stress at point b. 20 mm -200 mmarrow_forward
- 450 mm In 600 mm. a 72 mm 72 mm 125 kN 72 mm 192 mm t = 6 mm PROBLEM 6.10 For the beam and loading shown, consider section n-n and determine (a) the largest shearing stress in that section, (b) the shearing stress at point a.arrow_forwardPROBLEM 6.38 = 6.38 The vertical shear is 5.3 kN in a beam having the cross section shown. Knowing that d 100 mm, determine the shearing stress (a) at point a, (b) at point b. 12 mm d→ 125 mm 200 mm 12 mm b 100 mmarrow_forward1. (6%) Please sketch the distribution of shear stresses in a rectangular beam and determine where the maximum shear stress occurs. !! C りarrow_forward
- 1. (15%) (a) Consider a narrow rectangular beam subjected to a shear force V. Determine where the maximum shearing stress will be occurred. (b) Give an example for which plane stress condition can be used (c) Fixed supports only prevent rotation. (True/False) (d) Roller supports only prevent translation in vertical direction. (True/False) (e) Ely"=-q (True/False)arrow_forwardA horizontal pipe network has a connection of three pipes of different diameters, where the flow in section 3 exits to the atmosphere. The following requirements are required: a) Outlet flow rate at point 3. b) Pressure at point 2. c) x and y components of the force the flow exerts on the connection. Continuity, momentum, and energy equationarrow_forwardThe expression "flush" comes from the fact that the first toilet tanks were quite high, and you literally had to flush the toilet to move the stopper and flush the water. If the water level inside the tank is 1.8 m high and the pipe diameter is 5 cm, determine the following: a) The velocity of the water entering the toilet. b) The force at the junction of the pipe and the toilet, which is required to prevent the pipe from coming out and spilling water onto the floor. (Continuity, momentum, and energy equation)arrow_forward
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