Lookup or referral - involves locating a known item or a referral to a service point or staff member within or outside the library or confirming whether a specific service exists and where. Often starts with "Is there...?" or "Do we have...?". Examples - needs to know where to go for help with writing an essay, is there writing help? Do we have this book/article/journal?
Technical - involves facilitating or troubleshooting the use of physical equipment or technology. Typically, begins with "how do I...?". Examples: How do I print here? Stapler is out of staples. I can't connect to the WiFi.
The time it takes to answer a question does not determine its category.