Engineering » Page 81

Engineering

A complex gear drawing done on a drawing sheet marked M-1 has many section views showing important interior details of the gear. One of the cutting-plane lines is marked at the ends with a callout in a circular bubble that says 7 above a line and M-3 below the line. To find this detail, you would

Answer Answers (1)

Engineering

What is the origin of the "horsepower"? Why would anyone wish to express power in the unit of horsepower? How many watts are in one horsepower?

Answer Answers (1)

Engineering

Air enters the combustor of a jet engine at p1=10 atm, T1=1000°R, and M1=0.2. Fuel is injected and burned, with a fuel/air mass ratio of 0.06. The heat released during combustion is 4.5 x 10^8 ft-lbf per slug of fuel (or 18,000 BTU/lbm).

1. Assuming one-dimensional frictionless flow with γ = 1.4 for the fuel-air mixture, calculate M2, p2, and T2 at the exit of the combustor.

Answer Answers (1)

Engineering

Which aesthetic principle do architects generally follow?

A function follows form

B. function follows color

C. form follows function

D. form follows rhythm

E. function follows lines

Answer Answers (1)

Engineering

An average person produce 0.25 kg of moisture while taking a shower and 0.05 kg while bathing in a tub. Consider a family of four who each shower once a day in a bathroom that is not ventilated. Taking the heat of vaporization of water to be 2450 kJ/kg, determine the contribution of showers to the latent heat load of the air conditioner per day in summer?

Answer Answers (1)

Engineering

Format of a letter

Answer Answers (1)

Engineering

What are the air-standard assumptions?

Answer Answers (1)

Engineering

19.11 The atmosphere is stable with a lapse rate of - 0.2 °C/100 m. The surface air temperature is 15 °C. A parcel of air is released at the ground with a temperature of 25 °C. Calculate the maximum mixing height, in m.

Answer Answers (1)

Johnathon Werner

Engineering

Electromagnetic waves can carry more data at higher frequencies. Why would a scientist opt to transmit data at a lower frequency instead?

Answer Answers (1)

Engineering

A phone charger requires 0.5 A at 5V. It is connected to a transformer with 100 % of efficiency whose primary contains 2200 turns and is connected to 220-V household outlet.

(a) How many turns should there be in the secondary?

(b) What is the current in the primary?

(c) What would be the output current and output voltage values if number of secondary turns (N2) doubled of its initial value?

Answer Answers (1)

Engineering

Water enters a circular tube whose walls are maintained at constant temperature at specified flow rate and temperature. For fully developed turbulent flow, the Nusselt number determined from Nu - 0.023 can be law of cooling in this case is Re0.8 PrO. 4. The correct temperature difference to use in Newton's (a) the difference between the inlet and outlet water bulk temperature (b) the difference between the inlet water bulk temperature and the tube wall temperature (o) the difference between the average water bulk temperature and the tube temperature (d) the log mean temperature difference (e) None of the above. Explain.

Answer Answers (1)

Engineering

From the list below, select four situations in which casting is the preferred fabrication technique. (1) For alloys having low ductilities (2) When it is the most economical fabrication technique (3) When it is needed to join a large variety of metals and alloys (4) For large pieces and/or complicated shapes (5) For economical producing of parts that require very close dimensional tolerances (e. g. bushing and gears) (6) When mechanical strength is not an important consideration

Answer Answers (1)

Engineering

A copper-nickel alloy of composition 60 wt% Ni-40 wt% Cu is slowly heated from a temperature of 1250°C (2280 °F). (a) At what temperature does the first liquid phase form? (b) What is the composition of this liquid phase? (c) At what temperature does complete melting of the alloy occur? (d) What is the composition of the last solid remaining prior to complete melting?

Answer Answers (1)

Engineering

Determine the mass of a car that weight 3,500 lbs both in slugs and kilograms. The answer should be in kilograms.

Answer Answers (1)

Francisco Cantu

Engineering

Define and discuss the difference between micronutrients and macronutrients. Also, discuss their importance in the body at rest and during exercise.

Answer Answers (1)