In C
Exercise 8.1 A word is said to be “abecedarian” if the letters in the word appear in alphabetical order. For example, the following are all 6-letter English abecedarian words.
abdest, acknow, acorsy, adempt, adipsy, agnosy, be?st, behint, beknow, bijoux, biopsy, cestuy, chintz, de?ux, dehors, dehort, deinos, diluvy, dimpsy
a. Describe an algorithm for checking whether a given word (String) is abecedarian, assuming that the word contains only lower-case letters. Your algorithm can be iterative or recursive.
b. Implement your algorithm in a function called IsAbecedarian().
In: Mechanical Engineering
Essay about fire sprinkler in your own words.
In: Mechanical Engineering
A car’s radiator is a heat exchanger with 2 kg/s of hot water entering at 100 C and leaving at 60 C with a pressure of 200 kPa. Air flows across the heat exchanger entering at 25 C and leaving at 40 C. What is the volume flowrate of air needed in m3/s? (18.9 m3/s)
In: Mechanical Engineering
0.5 kg of R12 are contained in a piston/cylinder and has a quality of 75% and a temperature of 0 C. Heat is transferred at constant pressure until the R12 is a saturated vapor. Determine: a) the initial volume of the R12; b) the work done; c) the heat transfer; d) the T-v diagram.
Ans:
a) 0.0208 m3 b) 2.13 kJ c) 18.9 kJ
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PLEASE ANSWER ALL
1. Calculate the molar enthalpy of combustion at 25?C and 1 bar pressure of a gas of volumetric analysis 12% H2, 29% CO, 2.6% CH4, 0.4% C2H4, 4% CO2, and 52% N2 for the H2O in the vapour phase and in the liquid phase.
ANSWER (- 137 240 kJ/kmol; - 145 158 kJ/kmol)
2. A gaseous fuel has the following volumetric composition: CH4 0.38, H2 0.26, N2 0.06, CO 0.26, CO2 0.04. Find the stoichiometric air/fuel ratio by volume and the corresponding wet and dry volumetric analyses of the products of combustion.
ANSWER (4.86; CO2 0.121, H2O 0.182, N2 0.697; CO2 0.1485, N2 0.8515)
In: Mechanical Engineering
ANSWER ALL
1. A quantity of coal used in a boiler had the following analysis: 82% C; 5% H; 6% 0; 2% N; 5% ash. The dry flue gas analysis showed 14% CO2 and some oxygen. Calculate: (i) The oxygen content of the dry flue gas; (ii) The A/F ratio and the excess air supplied.
ANSWER (5.52%; 14.29/1; 31.8%)
2. The enthalpy of combustion of propane gas, C3H8, at 25 ?C with the H2O in the products in the liquid phase is – 50 360 kJ/kg. Calculate the enthalpy of combustion with the H2O in the vapour phase per unit mass of fuel and per unit amount of substance of fuel. ANSWER (- 46 364 kJ/kg; - 2 040 030 kJ/kmol)
In: Mechanical Engineering
1.Determine following conversation
(1) Define 'Decibel (dB)'
(2) Define 'time constant'
(3) Define 'Hall effect' and Writes it's principle and
representative Use
(4) Defne 'SI(International Systems of Units)'
(5) Characteristic of 'Operational Amplifier' (more than 3)
(6) Define 'Feedback Control'
(7) Explain Advantages of 'Microprocessor Controler' and
representative Use
(8) Define 'Cracking Pressure'
(9) Define 'Cavitation' and its Effect
(10) Definie 'Servo Valve' and Writes it's principle and
representative Use
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A.
The process most widely used to make fully-dense parts in metal or polymer is…?
Group of answer choices
a. Powder Bed Fusion - liquid phase sintering
b. Electron-beam melting
c. Sheet Lamination
d. Powder Bed Fusion - melting
B.
The most widely used “drop on demand” AM method…
Group of answer choices
a. uses thermal energy to generate pressure which produces droplets
b. uses pressure injectors to generate pressure which produces droplets
c. uses centrifugal force to generate pressure which produces droplets
d. uses piezoelectricity to generate pressure which produces droplets
C.
A "star-weave" scan pattern is used to:
Group of answer choices
a. Increase layer adhesion
b. Minimize the amount of uncured resin
c. Reduce the amount of part distortion
d. All of the above
In: Mechanical Engineering
What is easier: Homogeneous or heterogeneous nucleation? Why?
What does an Isothermal Transformation (IT) Diagram tell us?
How do nucleation rates and diffusion rates influence the shape of the IT Diagram?
What do the letters "A", "F", "P", "B", and "M" mean on these diagrams?
What are the similarities and differences between the following microstructures: Coarse Pearlite; Fine Pearlite; Bainite; Spheroidite; and Tempered Martensite?
How is Martensite (not the tempered kind) formed, and how is it completely different from the other microstructures listed above?
What is the ONLY phase that can transform to into Pearlite, Bainite, or Martensite?
Can you make Tempered Martensite using a single heat treatment, or do you need to use multiple heat treatments?
In: Mechanical Engineering
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1.Discuss the possible sources of errors (at least two) in Brinell hardness measurements.
2.why is it necessary to maintain P / D2 ratio of 30 for ferrous materials and 10 for non-ferrous materials is Brinell hardness test?
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explain with sketches the different types of cams and followers
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explain and elaborate the various types of gear trains
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Explain the velocity ratio of epicyclic gear trains is obtained by tabular method
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What goes in the Polynomial box and the LTI box in the simulink model?
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