Answer:
(a) Rate of heat transfer = 34.65 W/m
(b) quality of outlet of pipe x = 0.967
(c) Temperature of outer surface of insulation, T₂ = U1.157°C
Yes it is safe to touch, (But gentle touch)
Explanation:
Detailed explanation is given in the attach document.
Answer:
(a). Entropy change of refrigerant is = 0.7077 
(b). Entropy change of cooled space 
(c). Total entropy change is dS = 0.0232
Explanation:
Given data
Saturation pressure = 140 K pa
Saturation temperature from property table
= - 18.77 °c = - 18.77 + 273 = 254.23 K
(a). Entropy change of refrigerant is given by
Since heat absorbed by refrigerant Q = 180 KJ
dS = 0.7077
(b). Entropy change of cooled space
= - 10 °c = 263 K
(c). Total entropy change is given by
dS = 0.7077 - 0.6844
dS = 0.0232
This is the value of total entropy change.
Answer:
The vertical force, F = 19.9 lb.
Explanation:
Answer: See explanation
Explanation:
1. How is diesel fuel ignited in a warm diesel engine?
B. Heat compression
2. Which type of diesel injection produces less noise?
A. Indirect injection (IDI)
3. Which diesel injection system requires the use of a glow plug?
A. Indirect injection (IDI)
4. The three phases of diesel ignition include:
C. Ignition delay, repaid combustion, controlled combustion.
5. What fuel system component is used in a vehicle equipped with a diesel engine that is seldom used on the same vehicle when it is equipped with a gasoline engine?
D. Water-fuel separator
6. The diesel injection pump is usually driven by a _________________.
A. Gear off the camshaft
7. Which diesel system supplies high-pressure diesel fuel to all the injectors all of the time?
C. High-pressure common rail
8. Glow plugs should have high resistance when _____________and lower resistance when __________________.
B. Warm/cold
9. Technician A says that glow plugs are used to help start a diesel engine and are shut off as soon as the engine starts. Technician B says that the glow plugs are turned off as soon as a flame is detected in the combustion chamber. Which Technician is correct?
D. Neither Technicians A NOR B
10. What part should be removed to test cylinder compression on a diesel engine?
D. A glow plug
Answer : 9.36ohms/ temperature
Explanation:
Expression for the variation of resistance of platinum with temperature
Rt= Ro(1+*t)
Rt= resistance @ t°C
Ro= resistance @ 0°C
*= temperature coefficient of resistance
Calculate the change in resistance by putting 120ohms for Ro,
0.0039/K for *
20°C for t
Using this formula:
Rt = Ro(1+*t)
Rt- Ro = Ro*t
= (120ohms)(0.0039/K)(20°C)
= 9.36ohms/K
