Multiport fuel injection systems do not require a:
A. Crankshaft position sensor
B. Camshaft position sensor
C. Engine coolant temperature sensor
D. Intake air temperature sensor
Answer: B
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1. A walk-in freezer using R404A has the following conditions. Which of the groups of choices is the most logical explanation for the problem?
? Box temperature 30° ? Suction pressure 20 psig LOW Evaporator temperature (-15°) ? Suction line leaving the evaporator is 20° HIGH Superheat (35°) ? Ambient temperature is 70° ? Head pressure is 190 psig LOW (85° condensing temp means 15° condenser split) ? The liquid line is 75°. NORMAL subcooling (10°) a. The unit is low on refrigerant or the ambient is too cold. b. There is a restriction in the liquid line or the expansion valve. c. The head pressure control is not operating on the condenser. d. The evaporator is dirty, iced up, or there is an evaporator fan problem.
How does a suction to liquid heat exchanger improve system efficiency?
What will be an ideal response?
The dial-type meter used to measure the pressure in a heating unit flue pipe is called a ____________________.
Fill in the blank(s) with the appropriate word(s).