Bundle: Refrigeration And Air Conditioning Technology, 8th + Lab Manual + Lms Integrated For Mindtap Hvac-r, 4 Terms (24 Months) Printed Access Card
8th Edition
ISBN: 9781337087315
Author: John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher: Cengage Learning
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Question
Chapter 12, Problem 10RQ
To determine
A circuit with three loads wired in parallel.
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Students have asked these similar questions
Q1: Determine the length, angle of contact, and width of a 9.75 mm thick
leather belt required to transmit 15 kW from a motor running at 900 r.p.m. The
diameter of the driving pulley of the motor is 300 mm. The driven pulley runs at
300 r.p.m. and the distance between the centers of two pulleys is 3 meters. The
density of the leather is 1000 kg/m³. The maximum allowable stress in the
leather is 2.5 MPa. The coefficient of friction between the leather and pulley is
0.3. Assume open belt drive.
5. A 15 kW and 1200 r.p.m. motor drives a compressor at 300 r.p.m. through a pair of spur gears having
20° stub teeth. The centre to centre distance between the shafts is 400 mm. The motor pinion is made
of forged steel having an allowable static stress as 210 MPa, while the gear is made of cast steel
having allowable static stress as 140 MPa. Assuming that the drive operates 8 to 10 hours per day
under light shock conditions, find from the standpoint of strength,
1. Module; 2. Face width and 3. Number of teeth and pitch circle diameter of each gear.
Check the gears thus designed from the consideration of wear. The surface endurance limit may be
taken as 700 MPa. [Ans. m = 6 mm; b= 60 mm; Tp=24; T=96; Dp = 144mm; DG = 576 mm]
4.
G
A micarta pinion rotating at 1200 r.p.m. is to transmit 1 kW to a cast iron gear at a speed of 192 r.p.m.
Assuming a starting overload of 20% and using 20° full depth involute teeth, determine the module,
number of teeth on the pinion and gear and face width. Take allowable static strength for micarta as 40
MPa and for cast iron as 53 MPa. Check the pair in wear.
Chapter 12 Solutions
Bundle: Refrigeration And Air Conditioning Technology, 8th + Lab Manual + Lms Integrated For Mindtap Hvac-r, 4 Terms (24 Months) Printed Access Card
Ch. 12 - The __________is that part of an atom that moves...Ch. 12 - When this part of an atom moves to another atom,...Ch. 12 - State the differences between AC and DC.Ch. 12 - Describe how a meter would be connected in a...Ch. 12 - Describe how an amperage reading would be taken...Ch. 12 - Describe how the total resistance in a series...Ch. 12 - Ohm's law for determining voltage is _______.Ch. 12 - Ohm's law for determining amperage is_________.Ch. 12 - Ohm's law for determining resistance is_______.Ch. 12 - Prob. 10RQ
Ch. 12 - Describe the characteristics of the voltage,...Ch. 12 - If there were a current flowing of 5A in a 120-V...Ch. 12 - If the resistance in a 120-V circuit was 40 , what...Ch. 12 - Electrical power is measured in A. amperes. B....Ch. 12 - The formula for determining electrical power...Ch. 12 - Describe how a step-down transformer differs from...Ch. 12 - What are the three types of opposition to current...Ch. 12 - Prob. 18RQCh. 12 - What does forward bias on a diode mean?Ch. 12 - The unit of measurement for the charge a capacitor...
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