4-23. On    a four-stroke engine, the camshaft turns at one-half 1. piston speed 2. push rod speed 3. timing gear speed 4. crankshaft speed 1.     One 2. Two 3. Three 4. Four 4-25. In a     four-stroke engine, how    many piston strokes are required to complete one cycle? 1.     One 2. Two 3. Three 4. Four 4-26. In a four-stroke engine, each piston makes one power stroke for each 1. revolution of the crankshaft 2. two revolutions of the crankshaft 3. three revolutions of the crankshaft 4. four revolutions of the crankshaft 4-27. In a     four-stroke engine, the intake valve is open and the exhaust valve is closed during what piston stroke? 1. Intake 2. Compression 3. Power 4. Exhaust 4-28. In a    diesel engine, a    charge of fuel is forced into the cylinder when the piston nears the top of what stroke? 1. Intake 2. Compression 3. Power 4. Exhaust 4-29. In a    gasoline engine, the fuel air mixture is ignited by a    spark plug near the top of what piston stroke? 1. Intake 2. Compression 3. Power 4. Exhaust 4-30. In a     two-stroke diesel engine, how often in the cycle does the power stroke occur? 1. Every stroke 2. Every second stroke 3. Every third stroke 4. Every fourth stroke 4-31. Which of the following parts will NOT be found in a     two-stroke engine? 1. Pistons 2. Exhaust valves 3. Intake valves 4. Cylinders 4-32. In a     four-stroke engine, how fast does the camshaft turn in relation to the crankshaft? 1. l/2 as fast as the crankshaft 2. l/3 as fast as the crankshaft 3. l/4 as fast as the crankshaft 4. l/8 as fact as the crankshaft 4-33. The relation between the volume of the cylinder with the piston at the bottom of its stroke and the cylinder volume with the piston at the top of its stroke is called the 1. displacement ratio 2. travel ratio 3. stroke length 4. compression ratio 4-34. As the compression ratio is increased, what, if anything, happens to the temperature of the air in the cylinder? 1. It decreases 2. It increases 3. It decreases rapidly, then increases 4. Nothing 21