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1. Why is outside air mixed with return air?
2. How much outside air should be admitted to a space?
3. Can outside air ever be completely shut off from a space?
4. When will a preheater turn on?
If the same power is to be supplied to the same consumer by two wire d.c. system by a new line having a total resistance of 0.05 ohm and if the allowable voltage drop is 25%, calculate the d.c. supply voltage.
Estimate the reactor cooling requirement for a plant that produces 20,000 metric tons per year (20 kt/y) of acrolein if the reactor is operated isothermally.
A torque T = 750 kN.m is applied to the hollow shaft shown that has a uniform 8-mm wall thickness. Neglecting the effect of stress concentrations, determine the shearing stress at points a and b.
A high-pass filter is shown in Fig. 2.7a. If the cutoff frequency is to be 400 Hz,
How is the length of a short-circuited stub for a required input susceptance determined by using the Smith Chart?
To familiarize yourself with the Internet Standards, search the Internet for the IETF RFC website. Using the information you find on this site, answer the following questions: Identify four types of Internet standards.
The annual peak load of the feeder is 3000 kWh. Total copper loss at peak load is 300 kW. If the total annual energy supplied to the sending end of the feeder is 9000 MWh
A bandlimited signal with maximum frequency of 3.3 kHz, what is the minimum sampling frequency to sample this signal If a sinusoidal signal of 7 kHz is sampled by this sampling frequency, what is the frequency of the alias.
A certain iron core has an air gap with an effective area of 2 cm×3 cm and a length lg. The applied magne to motive force is 1000 A· turns, and the reluctance of the iron is negligible. Find the flux density and the energy stored in the air gap a..
A shunt dc motor has RA = 0.1-ohm and VT = 440 V. For an output power of 16.1 hp, nm = 1,213 rpm and IA = 103 A. The field current remains constant. Find the the rotational power loss in hp.
What can you say about a signal if its discrete time Fourier series (DTFS) is: (a) even? (b) odd?
Describe the phasor technique of solving a differential equation for the sinusoidal steady-state solution.
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