ELECTRICITY FOR TRADES (LL W/ACCESS)
3rd Edition
ISBN: 9781260699487
Author: Petruzella
Publisher: MCG CUSTOM
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Chapter 1.2, Problem 11RQ
To determine
Mention the safety way to open a disconnect switch using a lockout–tagout procedure.
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EXERCISE 1: Consider the waveguide of Example
Calculate the phase
constant, phase velocity and wave impedance for TE10 and TM11 modes at the
operating frequency of 15 GHz.
=
192.4 . For
Answer: For TE10, B = 615.6 rad/m, u = 1.531 × 108 m/s, TE
529.4 rad/m, u = 1.78 x 10 m/s, TM = 158.8 Q.
TM11, B
Example 1: A rectangular waveguide with dimensions a = 2.5 cm, b = 1 cm is to
operate below 15.1 GHz. How many TE and TM modes can the waveguide
transmit? if the guide is filled with a medium characterized by
σ = 0, &=4&o Hr = 1°
Calculate the cutoff frequencies of the modes.
lossles
016
X= x+jB
α= 0 B=w/ME
Up=
E =
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Mo M, E.Er
K =
Em² Cos(ut-132) az
2 = √μ
=377 √
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B = w√ Me [√ 1+ (e) + 1]
0
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ov+ jut
E=Eme Cos/wt-Bz) az
Good Conductor
X = B = √TPMN
11
42
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7 20
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E=Eml Gos(wt-Bz) az
micro wave.
Chapter 1 Solutions
ELECTRICITY FOR TRADES (LL W/ACCESS)
Ch. 1.1 - Does the severity of an electric shock increase or...Ch. 1.1 - In general, voltage levels above what value are...Ch. 1.1 - In general, current levels above what value are...Ch. 1.1 - What circuit fault can result in an arc flash?Ch. 1.1 - Define each of the following terms associated with...Ch. 1.1 - Explain why an arc flash is so potentially...Ch. 1.1 - What is a permit-required confined space?Ch. 1.1 - What does the term personal protective equipment...Ch. 1.1 - What personal protective attire is required when...Ch. 1.1 - When should face shields be worn?
Ch. 1.1 - A fall arrest system must be rigged so that...Ch. 1.1 - A ladder is used to reach the top of a building 16...Ch. 1.1 - What are the deck requirements for a scaffold work...Ch. 1.1 - Prob. 14RQCh. 1.1 - List the three ingredients required to sustain a...Ch. 1.1 - Which classes of fire are multipurpose...Ch. 1.1 - List four hazardous properties or characteristics.Ch. 1.2 - Prob. 1RQCh. 1.2 - Compare the terms grounding and bonding.Ch. 1.2 - Why is the earth not considered to be an effective...Ch. 1.2 - Explain what is meant by a ground fault.Ch. 1.2 - How does a ground-fault circuit interrupter (GFCI)...Ch. 1.2 - How does a ground-fault circuit interrupter (GFCI)...Ch. 1.2 - Explain what is meant by an arcing fault.Ch. 1.2 - Compare the amount of current that results from...Ch. 1.2 - Compare what GFCIs and AFCIs protect against.Ch. 1.2 - What does a lockout-tagout procedure refer to?Ch. 1.2 - Prob. 11RQCh. 1.2 - A voltmeter is used to verify that no voltage is...Ch. 1.2 - What is the main goal of OSHA?Ch. 1.2 - What is the primary purpose of the rules set forth...Ch. 1.2 - Assume a piece of electrical equipment has been...Ch. 1.2 - How often is the National Electrical Code updated...
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