The correct answer is: C. 1.4 m/s
The slewing speed of an X-Y recorder is the maximum speed at which the pen can move across the paper. It is usually specified in meters per second (m/s). The slewing speed is important because it determines how quickly the recorder can respond to changes in the input signal. A higher slewing speed allows the recorder to capture more detail in the signal, but it also increases the risk of overshoot and ringing.
Option A: 1.6 m/s is too high. This would cause the recorder to overshoot and ring when the input signal changes.
Option B: 1.3 m/s is too low. This would not allow the recorder to capture all of the detail in the signal.
Option C: 1.4 m/s is the correct answer. This is a good compromise between speed and accuracy.
Option D: 1.5 m/s is too high. This would cause the recorder to overshoot and ring when the input signal changes.