Simple Machine II - JSS2 Basic science Past Questions and Answers - page 2
How should machines be stored to prevent damage?
In a clean, dry environment
In a humid environment
In direct sunlight
In a dusty environment
What should be done promptly to address machine issues?
Delaying repairs
Ignoring worn-out parts
Addressing issues through repairs or replacements
Increasing usage beyond capacity
Which of the following is a common application of gears?
Baking cookies
Playing video games
Wind turbines
Watching movies
What do gears help control in robotic systems?
Energy consumption
Temperature
Movement and power distribution
Sound production
In which industry are gears used in aircraft engines?
Automotive
Aerospace
Renewable energy
Consumer electronics
What role do gears play in industrial machinery?
Controlling motion and power transmission
Controlling motion and power transmission
Increasing temperature
Increasing noise
How do gears change the speed, torque, or direction of motion in a mechanical system?
Gears change the speed, torque, or direction of motion by meshing teeth with other gears, which transmits motion from one gear to another, altering the output compared to the input.
What factors contribute to the efficiency of simple machines?
Factors such as friction, heat, and air resistance affect the efficiency of simple machines. Minimizing these factors through proper maintenance and design helps improve efficiency.
Why is regular maintenance important for machines?
Regular maintenance is crucial for machines because it helps prevent wear and tear, ensures optimal performance, and extends the lifespan of the machine.
What are some common applications of gears in everyday life?
Gears are used in various applications such as automobiles (transmissions), bicycles, clocks, and household appliances like blenders and washing machines.