Industrial Motor Control
7th Edition
ISBN: 9781133691808
Author: Stephen Herman
Publisher: Cengage Learning
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Chapter 46, Problem 8RQ
What is the disadvantage of driving a junction transistor into saturation?
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A six cylinder petrol engine has a compression ratio of 5:1. The clearance volume of each cylinder is 110CC. It operates on the four-stroke constant volume cycle and the indicated efficiency ratio referred to air standard efficiency is 0.56. At the speed of 2400 rpm. 44000KJ/kg. Determine the consumes 10kg of fuel per hour. The calorific value of fuel average indicated mean effective pressure.
The members of a truss are connected to the gusset plate as shown in (Figure 1). The forces
are concurrent at point O. Take = 90° and T₁ = 7.5 kN.
Part A
Determine the magnitude of F for equilibrium.
Express your answer to three significant figures and include the appropriate units.
F= 7.03
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kN
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▾ Part B
Determine the magnitude of T2 for equilibrium.
Express your answer to three significant figures and include the appropriate units.
Figure
T₂ = 7.03
C
T2
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KN
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Consider the following acid-base reaction:
Fe3+(aq) +3H2O -Fe(OH)3 (s) + 3H*
←
A. Using thermodynamics, calculate the equilibrium constant K at 25°C (The AG° of formation of
Fe(OH)3(s) is -699 kJ/mol).
B. Using the value of K you calculated in part a, if a solution contains 10-4 M Fe3+ and has a pH of 7.5,
will Fe(OH)3(s) precipitate? Show all calculations necessary to justify your answer. Note that the
reaction as written is for precipitation, not dissolution like Ksp-
Chapter 46 Solutions
Industrial Motor Control
Ch. 46 - Prob. 1RQCh. 46 - Prob. 2RQCh. 46 - If an alternator is used to provide variable...Ch. 46 - What solid-state device is generally used to...Ch. 46 - Why are SCRs used to construct a bridge rectifier...Ch. 46 - What is the main disadvantage of using SCRs in a...Ch. 46 - How are junction transistors driven into...Ch. 46 - What is the disadvantage of driving a junction...Ch. 46 - Prob. 9RQCh. 46 - In variable frequency drives that employ IGBTs,...
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