Powerplant Maintenance Quiz

What is the position of the piston that shows the smallest volume?

• Bottom Dead Center

• Middle Dead Center

• Top Dead Center

• Side Dead Center

In a 4-stroke engine, at how many degrees before top dead center does the intake valve open?

• 45°

• 50°

• 60°

• 15°

What is the main difference between a 2-stroke engine and a 4-stroke engine?

• Number of strokes in the cycle

• Number of cylinders

• Type of fuel used

• Presence of valves

What is the formula to calculate the total displacement of an engine with multiple cylinders?

• Vt = Vu + N

• Vt = Vu - N

• Vt = Vu / N

• Vt = Vu x N

What is the correct range of compression ratio for Otto cycle engines?

• 2:1 to 5:1

• 25:1 to 30:1

• 8:1 to 12:1

• 15:1 to 20:1

What is the power delivered to the propeller for useful work known as?

• Indicated Horsepower

• Frictional Power

• Torque Power

• Brake Horsepower

What is the measure of load expressed in pounds per inch or pounds per foot?

• Pressure

• Temperature

• Torque

• Volume

What is the position of the piston that shows the largest volume?

• Top Dead Center

• Bottom Dead Center

• Side Dead Center

• Middle Dead Center

What is the correct range of compression ratio for Diesel cycle engines?

• 14:1 to 18:1

• 28:1 to 30:1

• 8:1 to 12:1

• 20:1 to 25:1

What is the constant used to convert foot-pounds of work per minute to kilowatts?

• 25,000

• 33,000

• 50,000

• 40,000