SACA Factory Data Analytics 4

Question 1

A manufacturer collects vibration data from 500 sensors every second. Which storage architecture best handles this volume?

Accepted Answer

Time-series database optimized for high-frequency writes

Answer

Time-series databases like InfluxDB are architected specifically for high-frequency, timestamped data ingestion from many sources.

Question 2

What does a scatter plot between tool wear and surface roughness primarily reveal?

Accepted Answer

The correlation or relationship between the two variables

Answer

A scatter plot visualizes the relationship or correlation between two continuous variables.

Question 3

In predictive maintenance, what is 'remaining useful life' (RUL)?

Accepted Answer

The estimated time until a component will require replacement or failure

Answer

RUL is the predicted time or operational cycles left before a component fails, enabling proactive maintenance scheduling.

Question 4

Which statistical test would you use to determine if defect rates differ significantly across three production lines?

Accepted Answer

Chi-square test or ANOVA

Answer

Chi-square tests compare categorical outcomes across groups, and ANOVA compares means across three or more groups.

Question 5

What is feature engineering in the context of factory machine learning models?

Accepted Answer

Creating derived input variables from raw data to improve model performance

Answer

Feature engineering transforms raw sensor data into meaningful derived variables, such as rolling averages or rate-of-change, that better represent process behavior.

SACA - Smart Automation Certification Alliance Practice Test

SACA - Smart Automation Certification Alliance Practice Test

SACA Factory Data Analytics 4