Car Exam

Describe how a fuel-cell-powered vehicle works.

intake valve intake compression JO BI Tuel injector the temperature of the gas; power exnaust vaive 0010 exhaust The diagrams show the cylinder of a petrol engine in 4 stages. Petrol vapour and air are drawn into the cylinder, The mixture is then squeezed together, and then exploded by a spark. The explosion pushes down the piston. The exhaust gases are then expelled from the cylinder. Use the first law of thermodynamics to analyse the energy changes during the process. At each stage explain what happens to i) the pressure of the gas; ii)

Discuss the importance of the fuel supply system in an internal combustion engine.

The primary difference between these non-road (off road) types of diesel fuel is one contains a red dye and one does not. Otherwise the two diesel fuels are relatively identical.  In some states there may be a higher level of sulfur in the off road diesel.  From a regulatory perspective, the off road diesel tank is not regulated and is not required to have the leak detection, spill prevention or overfill prevention that a regulated tank is.  Why is regular diesel fuel regulated (underground storage tanks) and off-road not regulated?

1.      Based on various gas turbine configurations (i.e turboprop, turbojet, turbofan, turboshaft), indicate which engine type would be most applicable for the following aerospace applications, and why it is the most appropriate i)                   Military application of the Joint Strike Fighter (JSF) ii)                  A short range commercial flight, i.e. Cardiff to Dublin iii)                A hypersonic unmanned aerospace vehicle (UAV) iv)                A long range commercial flight, i.e. London-New York

What is the testing procedure for diesel systems as outlined by the national environment protection (diesel vehicle emissions) measure?

Part A Some tire stores claim that filling your car tires with pure, dry nitrogen is much better than using plain air. They make the following claims. 1. The pressure inside N₂-filled tires does not rise or fall with temperature changes. 2. Nitrogen leaks out of tires much more slowly than air because the N₂ molecules are bigger. 3. Nitrogen is not very reactive, and moisture and O₂ in air cause corrosion that shortens tire life by 25-30% Evaluate the claim as a whole. Check all that apply. Claim passes falsifiability test. Claim passes logic test. Claim passes replicability test. Claim passes sufficiency test Claim fails all four FLaReS tests. Submit Request Answer

Provide a statement of sustainability criteria for a hydrogen car charger at a university campus.

Problem 4) LHV and HHV of Fuels Consider the following list of some fuels with their LHV and HHV. a) Provide a plot of the LHV as a function of the molecular mass of the fuel. Group the fuels in categories and discuss any correlation between the heating values and the molecular mass. b) Provide a plot of the percentage increase of the HHV relative to the LHV as a function of the molecular mass of the fuel. Discuss any correlation or generalization. Fuel LHV and HHV LHV Methane (CH4) Propane (C3H8) Isooctane (C8H18) Cetane (C16H34) Methanol (CH40) Ethanol (C2H60) Carbon Monoxide (CO) (MJ/kg) 50.0 46.4 44.2 44.0 20.0 26.9 10.1 HHV (MJ/kg) 55.5 50.4 47.8 47.3 22.7 29.7 10.1

A hybrid vehicle uses two different power sources.

1) What is the testing procedure for diesel systems as outlined by the national environment protection (Diesel vehicle emissions) measure? 2) Discuss the danges of working with diesel. In your discussion outline the risks, effects of exposure and minimization strategies.

Hybrid vs Conventional Automobile Research the environmental impacts of these two vehicles throughout the life cycle! Which one is better and Why?

b) Explain how the following jet engine works. Refer to each section of the engine and explain the purpose of each section. COMPRESSION COMBUSTION EXHAUST INTAKE Air.Inlet Compression Combustion Chambers Turbine Exhaust Cold Section Hot Section Figure Q4b

Engine Four-Stroke Cycle Valves Closed Valves Closed Intake Valve Closed Intake Valve Open Exhaust Valve Open Spark Plug Exhaust Valve Closed Air-fuel Mixture Spark Plug Firing Exhaust Gases Combustion Chamber Piston Connecting Rod Crankshaft Intake Compression Power Exhaust Piston pushes out burned gases Air-fuel mixture Explosion forces Air-fuel mixture is drawn in is compressed piston down Examine the diagram above. It shows the four basic steps in a 4-stroke internal-combustion engine that are usually found in cars. Based upon what you have learned, explain why, in the 3rd step, the explosion forces the piston down.

define Fuel conversion efficiency in the context of an ICE hybridengine then in the context of a Fuel cell