Answer:
The correct option is A:
A) 5
Explanation:
One of the best way to know about the vacuum leak on a speed-density fuel injection is to look at IAC count or percentage. A reading less than 5 would indicate a vacuum leak. The extra air from the leak will result in:
- Increase of Idle speed
- MAP sensor interprets it as an additional load on the engine
- Injector pulse width increases
- IAC count decreases, trying to reduce engine speed to a previously set value
- Air-fuel mixture remains the same
Answer:
For most uses you'll want your water heated to 120 F(49 C) In this example you'd need a demand water heater that produces a temperature rise and it will take about 2 hours
Answer:
a) The exit temperature is 39.25°C
b) The highest component surface is 132.22°C
c) The average temperature for air equal to 35°C is a good assumption because the air temperature at the inlet will increase due to the result in the heat gain produced by the duct and whose surface is exposed to a flow of hot.
Explanation:
a) The properties of the air at 35°C:
p = density = 1.145 kg/m³
v = 1.655x10⁻⁵m²/s
k = 0.02625 W/m°C
Pr = 0.7268
cp = 1007 J/kg°C
a) The mass flow rate of air is equal to:

The exit temperature is:
°C
b) The mean fluid velocity is:

The hydraulic diameter is:

The Reynold´s number is:

Assuming fully developed turbulent flow, the Nusselt number is:


The highest component surface temperature is:
°C
Answer:
a) C= 1/120
b) P(X>=5) = 0.333
Explanation:
The attached file contains the explanation for the answers