"What time are you expected to be?" doesn't really make sense because it's unclear. Depending on context, you could use the following: "What time are you expected to be here tomorrow?" This one works if it's not your friend's choice, but someone or something else that decides when he/she arrives (for example, he/she is flying in and his/her flight is landing at a certain time). "What time can you be here by?" This one works if you'd like him/her to arrive on or before a certain time. "What time do you want to come?" This one works if you're allowing him/her to make the choice of time. "What time can I expect you?" This one works if you want him/her to set an exact time immediately. I hope this helps you.

What time will you be here tomorrow? What time do you think you will arrive tomorrow? When will you arrive tomorrow? When will you be here tomorrow?

hello, you can also say in addition to the above answers: At what time you are coming tomorrow? At what time you're planning to come tomorrow?