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26 Cards in this Set
- Front
- Back
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The engine flywheel should be pinned and locked out before entering the crankcase |
True |
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Before performing maintenance on a recently run engine, you must |
Disconnect any electrical feed and close, lock, tag and purge all gas sources |
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When working in areas of high concentrations of hydrogen sulphide (h2s) you should always wear a personal alarm monitor |
True |
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The thermal efficiency of an engine is best described as the ability of the engine to |
Change the energy in the fuel to usable heat energy and power |
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The amount of air an engine is able to take into the cylinder compared with the volume of the cylinder is called |
Volumetric efficiency |
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The description of compression ratio is best stated as |
The cylinder volume plus the combustion chamber volume, divided by the combustion chamber volume |
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On a 2-stroke engine with 6 cylinders and a firing order of 1-5-3-6-2-4, the running mates would be |
None of the above because its a two stroke |
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The displacement of a 6 cylinder engine with a 5 inch bore and a 6 inch stroke is |
707 cubic inches |
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When comparing a Diesel engine to a gas engine, the |
Compression pressures may be twice as high or greater in a Diesel engine Compression ratios are approximately twice as high or greater in a Diesel engine Diesel engine is heavier |
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When air is compressed, what are the noticeable effects |
The temperature increases as the volume becomes smaller |
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The SI metric system measures pressure in |
Pascals |
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When you are determining engine rotation using the SAE standard, you view the engine from |
The main power end of the engine |
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Which type of head design has the valves in the block |
An L head engine |
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Indicated horsepower is the power at the flywheel of the engine |
False, indicated power is the theoretical power of an engine |
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Spark ignition engines have a much lower compression ratio than diesel engines |
True |
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The classification for an engine with a normal operating speed for 800 rpm is a low speed engine |
False; an engine with a normal operating speed of 800 rpm would be classified as a medium speed engine |
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Integral engines require proper alignment with the driven equipment |
False |
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A two stroke engine complete one cycle in how many degrees of rotation |
360 |
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Potential energy is the energy resulting from the motion of an object |
False; kinetic energy is the energy resulting from the motion of an object |
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An undersquare engine is and engine with a larger stroke than bore |
True |
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Blowby is leakage past the rings |
True |
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Running mates are pistons that reach TDC at the same time |
True |
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The basic requirements for combustion are air, spark and compression |
False; the basic requirements for combustion are fuel, air and ignition |
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The fuel must be atomized and mixed with air to be burned |
True |
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At the end of the exhaust stroke, the intake and exhaust valves are open at the same time |
True |
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A two stroke engine makes twice as much power as a four stroke engine of the same capacity |
False; the two stroke engine does not have twice the power because the effective power stroke is shorter than the effective power stroke of a four stroke engine |
