Acting in turn

What is the main means for the efficient transfer of energy from one direction to another?

• The gear

• The Nordic mill

• The paddle wheel

• The chain of pots

What form of rotary motion allowed Nordic mills to more effectively utilize water energy?

• Vertical paddle wheel

• Horizontal paddle wheel

• Inclined paddle wheel

• Curved paddle wheel

What type of gear is used to change the plane of rotation?

• Planetary gear

• Helical gear

• Bevel gear

• Worm gear

What type of gear was introduced to solve the problem of speed difference in a vehicle's wheels when turning?

• Cone gear

• Spiral gear

• Differential gear

• Planetary gear

What type of gear is used to handle high power loads in a compact and flexible manner?

• Cone gear

• Helical gear

• Worm gear

• Planetary gear

What type of gear is commonly used with marine turbines due to its ability to handle large power loads?

• Worm gear

• Planetary gear

• Helical gear

• Bevel gear

What principle was first used in the synchronized gearbox to allow smooth speed changes?

• Cone gear

• Sun and planet gear

• Helical gear

• Worm gear

What gear shape is considered the best for gear teeth due to its high degree of rolling contact?

• Cone gear

• Helical gear

• Worm gear

• Involute gear

What type of gear was used for the first time in the first turbine-powered ship in 1897?

• Cone gear

• Helical gear

• Worm gear

• Planetary gear

What form of gear was introduced to overcome the problem of friction when teeth slide?

• Cone gear

• Involute gear

• Worm gear

• Herringbone gear