Which of the following is a special fitting that receives the products of combustion from the appliance and admits dilution air to the stream?
a. single wall chimney
b. single wall vent connector
c. vent connector
d. draft hood
ANSWER: d
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Answer the following statement(s) true (T) or false (F)
1. Because of the skin effect, there is more useful copper conducting area with alternating current. 2. The impedance section of each circuit considered consists of a reactor having a relatively large inductive reactance compared to the effective resistance. 3. A large Q is desirable because it means that the useful inductive reactance is high and the effective resistance is low. 4. A low value of Q means that the resistance component is relatively low. 5. Reactors that have a high Q value are often treated as pure inductors, and the amount of wire resistance is ignored because it is such a small part of the total impedance of the coil.
Earthmoving equipment with a first cost of $150,000 is expected to have a life of 10 years. The salvage value is expected to be 10% of the first cost. Calculate (a) by hand, and (b) by spreadsheet the depreciation charge and book value for years 2 and 7 using the SYD method.
What will be an ideal response?
Once an interview has been granted, the employer will want to see ____.
A. your notebook with engineer's sketches B. one example of an engineering drawing you produced C. one example of a section drawings you created D. your portfolio of drawings
Use PSpice to find currents IaA and IAC in the unbalanced three-phase system shown in Fig. 12.69. Let Zl = 2 + j, Z? = 40 + j20 ?, Z? = 50 – j30 ?, and Z? = 25 ?.
What will be an ideal response?