AUTOMOTIVE TECHNOLOGY-NATEF TASK SHEETS
6th Edition
ISBN: 9780135257418
Author: Halderman
Publisher: PEARSON
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Chapter 23, Problem 7CQ
Lower than specified oil pressure is measured on a high mileage engine. Technician A says that wom main or rod bearings could be the cause. Technician B says that a clogged oil pump pickup screen could be the cause. Which technician is correct?
- a. Technician A only
- b. Technician B only
- c. Both Technicians A and B
- d. Neither Technician A nor B
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During a picnic on a hot summer day, all the cold drinks disappear quickly, and the only available drinks are those at the ambient temperature of 85°F. In an effort to cool a 12- fluid-oz drink in a can, a person grabs the can and starts shaking it in the iced water of the chest at 32°F. Using the properties of water for the drink, determine the mass of ice that will melt by the time the canned drink cools to 37°F. The density and specific heat of water at the average temperature of (85+37)/2 = 61ºF are ρ = 62.3 lbm/ft3 and cp = 1.0 Btu/lbmºF (Table A-3E). The heat of fusion of water is 143.5 Btu/lbm.
The mass of ice that will melt by the time the canned drink cools to 37°F is lbm.
Steam enters a nozzle at 400°C and 800 kPa with a velocity of 10 m/s and leaves at 375°C and 400 kPa while losing heat at a rate of 26.5 kW. For an inlet area of 800 cm2, determine the velocity and the volume flow rate of the steam at the nozzle exit. Use steam tables.
At the left side of the lines, 800 kilo Pascal, 400 degree Centigrade, 10 meters per second are shown. At the right side of the lines, 400 kilo Pascal, 375 degree Centigrade are shown.
The velocity of the steam at the nozzle exit is m/s.
The volume flow rate of the steam at the nozzle exit is m3/s.
Chapter 23 Solutions
AUTOMOTIVE TECHNOLOGY-NATEF TASK SHEETS
Ch. 23 - What causes a wedge-shaped film to form in the...Ch. 23 - What is hydrodynamic lubrication?Ch. 23 - Explain why internal engine leakage affects oil...Ch. 23 - Describe how the oil flows from the oil pump,...Ch. 23 - What is the purpose of a windage tray?Ch. 23 - Normal oil pump pressure in an engine is...Ch. 23 - Two technicians are discussing oil pumps....Ch. 23 - A typical oil pump can pump how many gallons per...Ch. 23 - In typical engine lubrication systems, what...Ch. 23 - Hydrodynamic lubrication created by the wedging...
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