AUTMOTIVE TECH, TECH MANUAL & MIND TAP
6th Edition
ISBN: 9781305383180
Author: ERJAVEC
Publisher: CENGAGE L
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Chapter 12, Problem 3RQ
What usually causes warpage in an aluminum cylin der head?
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Propane is burned completely with excess oxygen. The product gas contains 24.5 mole% CO2, 6.10% CO, 40.8% H2O, and 28.6% O2.
(a) Calculate the percentage excess O2 fed to the furnace.
(b) A student wrote the stoichiometric equation of the combustion of propane to form CO2 and CO as:
2C3H8 + 11O2 → 3CO2 + 3CO + 8H2O
According to this equation, CO2 and CO should be in a ratio of 1/1 in the reaction products, but in the product gas of Part (a) they are in a ratio of 24.8/6.12. Is that result possible? (Hint: Yes.) Explain how
Enumerate the various methods for catalyst preparation and discuss vividly any one of the methods
2. Design a spherical tank, with a wall thickness of 2.5 cm that will ensure that no more than 45 kg of
hydrogen will be lost per year. The tank, which will operate at 500 °C, can be made from nickel,
aluminum, copper, or iron (BCC). The diffusion coefficient of hydrogen and the cost per pound for each
available material is listed in Table 1.
Material
Do (m2/s) Q (J/mol) Cost ($/kg)
Nickel
5.5 x 10-7
37.2
16.09
Aluminium
1.6 x 10-5
43.2
2.66
Copper
1.1 x 10-6
39.3
9.48
Iron (BCC)
1.2 × 10-7
15.1
0.45
Table 1: Diffusion data for hydrogen at 500 °C and the cost of material.
Chapter 12 Solutions
AUTMOTIVE TECH, TECH MANUAL & MIND TAP
Ch. 12 - Explain staged and continuously variable value...Ch. 12 - Define valve margin.Ch. 12 - What usually causes warpage in an aluminum cylin...Ch. 12 - What are the two ways pushrods can be checked for...Ch. 12 - Which of the following is not true of knurling? It...Ch. 12 - True False? Fiats MultiAir system relies on...Ch. 12 - To allow the engine to run on the Atkinson cycle,...Ch. 12 - Prob. 8RQCh. 12 - To ensure proper seating of the valve, the valve...Ch. 12 - When checking valve fit, contact between the valve...
Ch. 12 - If the valve face and valve seat do not contact...Ch. 12 - Many engines with WT have a phaser mounted to the...Ch. 12 - Multiple valve engines tend to be more efficient...Ch. 12 - Which of the following is not a type of valve...Ch. 12 - Which of the following statements is not true?...Ch. 12 - While discussing the reasons for resurfacing a...Ch. 12 - While inspecting the timing gears of an engine:...Ch. 12 - Technician A says that positive valve stem seals...Ch. 12 - When fitting a freshly ground valve into a freshly...Ch. 12 - Technician A says off-square springs may cause...Ch. 12 - Technician A says it is not necessary to measure...Ch. 12 - Technician A uses a 30-degree stone for topping a...Ch. 12 - While discussing the Valvetronic system:...Ch. 12 - While checking a hydraulic phaser after the...Ch. 12 - While servicing a pair of aluminum cylinder heads:...
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- The power out of an adiabatic steam turbine is 5 MW and the steam enters turbine at 2 MPa and velocity of 50 m/s, specific enthalpy (h) of 3248 kJ/kg. The elevation of the inlet is 10 m higher than at the datum. The vapor mixture exits at 15 kPa and a velocity of 180 m/s, specific enthalpy (h) of 2361.01 kJ/kg. The elevation of the exit is 6 m higher than at the datum. Let g = 9.81 m/s². Assuming the ideal gas model and R = 0.462 KJ/(kg.K). The steam specific heat ratio is 1.283. Calculate:arrow_forwardstep by step pleasearrow_forwardstep by step pleasearrow_forward
- step by steparrow_forwardThe power out of an adiabatic steam turbine is 5 MW and the steam enters turbine at 2 MPa and velocity of 50 m/s, specific enthalpy (h) of 3248 kJ/kg. The elevation of the inlet is 10 m higher than at the datum. The vapor mixture exits at 15 kPa and a velocity of 180 m/s, specific enthalpy (h) of 2361.01 kJ/kg. The elevation of the exit is 6 m higher than at the datum. Let g = 9.81 m/s². Assuming the ideal gas model and R = 0.462 KJ/(kg.K). The steam specific heat ratio is 1.283. Calculate:arrow_forwardThe power out of an adiabatic steam turbine is 5 MW and the steam enters turbine at 2 MPa and velocity of 50 m/s, specific enthalpy (h) of 3248 kJ/kg. The elevation of the inlet is 10 m higher than at the datum. The vapor mixture exits at 15 kPa and a velocity of 180 m/s, specific enthalpy (h) of 2361.01 kJ/kg. The elevation of the exit is 6 m higher than at the datum. Let g = 9.81 m/s². Assuming the ideal gas model and R = 0.462 KJ/(kg.K). The steam specific heat ratio is 1.283. Calculate:arrow_forward
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