Which of the following consists non-parallel and non-intersecting gears?

1. Spur gears
2. Helical gears
3. Worm gears
4. None of these

In which of the following machines, gear ratio is applicable?

1. Bicycles
2. Vehicles
3. Industrial devices
4. All of these

Which of the following statements hold true for GPS?

1. It is a space-based radio navigation system.
2. It comprises satellites that emit navigational signals.
3. It is supported by control and ground monitoring stations.
4. All of these

Which of following type of sensor is used to measure the rate of change in velocity?

1. Force sensor
2. Position sensor
3. Acceleration sensor
4. Velocity sensor