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MECH&AE 131A · Lec 1

Intermediate Heat Transfer

Fall 2026Wei, T.4 units

Seats, time, final and grades

Seats

Open, 42 seats left.

48 of 90 enrolled, lecture and all discussions summed.

Meets

MW 4:00pm-5:50pm

Lecture only. You also attend a discussion, listed below.

Final

Thu 10 Dec, 11:30am to 2:30pm

One exam for the whole class, Los Angeles time.

Read 3 days ago.

Grades

3.30
predicted, all instructors · 163 grades

163 letter grades, everyone who has taught MECH&AE 131A.

Read 5 hours ago. The latest refresh is overdue. Seats and instructors may have changed since. Check the registrar before enrolling.

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Before you can enroll

Registrar's Restrictions cell, read 3 days ago: "Undergraduate School of Engineering Majors".

Tell dibs what you have already taken and this line will say which of these you have. Your list.

From the registrar

Students who enroll in upper-division courses offered by the Samueli School without completing the requisites are subject to disenrollment after the second class meeting. If necessary, consult with an OASA counselor through MyUCLA Message Center.

Restrictions read 3 days ago. dibs re-reads these slowly because they rarely change; watch the section and it moves to every 6 hours.

Discussions

You enroll in the discussion, not the lecture, so the seat figure above is the sum across all of them and can read open while every discussion you could actually join is full.

1 discussion, all open.

  • Dis 1A

    F 4:00pm-5:50pm

    Bao, Y.

    Open, 42 seats left.

When it meets

Mon
Tue
Wed
Thu
Fri
6am
7am
8am
9am
10am
11am
12pm
1pm
2pm
3pm
4pm
5pm
6pm
7pm
8pm
9pm
10pm

Meets: MW 4:00pm-5:50pm

Discussions: F 4:00pm-5:50pm

Boelter Hall 5249

Grades

3.30
predicted, all instructors · 163 grades

2 people have taught MECH&AE 131A in the grade record: DHIR, VIJAY K at 3.51 over 97 grades and VALDARNO, LUCA at 2.98 over 66 grades.

A range
53%
P/NP
-
letter grade only
D/F/W
4.3%

Full grade history for MECH&AE 131A

What students say

dibs measures outcomes: grades, seats, how fast it fills. For what the class is actually like to sit in, BruinWalk has the reviews.

What the work looks like

  • Exams mentioned, no number given, said by 4 reviewers
  • Problem sets mentioned, no number given, said by 4 reviewers
  • Projects mentioned, no number given, said by 3 reviewers

Read from 18 reviews 17 days ago. dibs counts only what a review actually states, so a kind of work nobody mentioned is absent rather than zero.

Will it still be here

low risk chance of closing before your enrollment pass.

Final enrollment per term from four years of grade data. Summer excluded: different population, different pass structure.

  • 5021F
  • 4922F
  • 6625F
Enrollment by term: 21F 50, 22F 49, 25F 66

Peak 66 · most recent 25F at 66

Seats over time

Nothing read since 1 Oct, 5 hours ago. Over about 2 months before that, freed 3 seats.

48 of 90 · 42 left in its discussions
17 Aug 15:079 Sep 06:351 Oct 22:03 · 5 hours ago
dibs read 168 of the 696 hours its hourly record covers, 24%, and did not look in 528. dibs had no hourly record before 2 Sep, which is the other 392 of 1088 plotted.48 of 90 enrolled at the newest reading, 5 hours ago, with 42 left in its discussions. Seats from 17 Aug 15:07 to 1 Oct 22:03, 51 to 48. dibs read 168 of the 696 hours its hourly record here covers, 24%. An hour marked as read confirms a check, not continuous monitoring. That check recorded no change; changes between checks may be missed. For 528 hours dibs was keeping a record and did not reach this section. Nothing before 2 September at 23:00, where this section's record starts, has a read either way, which is 392 hours of this window. Where the drawing is faint or broken, that never means the readings are doubtful. It means the stretch between them is unaccounted for.

A dot is a reading where something moved: the seat count, the status, or the waitlist. Flat between dots joins recorded counts; changes between reads may be missed. The line starts when dibs first saw this section rather than reaching back before it existed. The last one is the last time dibs read this section, moved or not, and that was 5 hours ago. It is where the line stops, not where the count is now.

Show the readings (26)
Recorded Enrolled Capacity Status Waitlist Hours read
1 Oct 22:03 48 90 open - 1 of 1
1 Oct 22:02 48 90 open - 8 of 26
30 Sep 21:42 49 90 open - 7 of 23
29 Sep 23:42 51 90 open - 2 of 5
29 Sep 19:22 50 90 open - 2 of 5
29 Sep 15:52 51 90 open - 6 of 18
28 Sep 22:32 50 90 open - 2 of 4
28 Sep 19:02 49 90 open - 2 of 5
28 Sep 15:32 50 90 open - 5 of 15
28 Sep 01:12 49 90 open - 14 of 47
26 Sep 03:42 50 90 open - 10 of 33
24 Sep 19:22 52 90 open - 2 of 5
24 Sep 15:52 53 90 open - 24 of 86
21 Sep 02:22 54 90 open - 3 of 8
20 Sep 19:22 55 90 open - 25 of 86
17 Sep 06:32 54 90 open - 3 of 9
16 Sep 22:32 53 90 open - 7 of 22
16 Sep 01:42 54 90 open - 62 of 337, 22 no hourly record
2 Sep 01:40 53 90 open - no hourly record
1 Sep 21:40 52 90 open - no hourly record
1 Sep 20:40 53 90 open - no hourly record
1 Sep 12:40 52 90 open - no hourly record
1 Sep 11:40 53 90 open - no hourly record
1 Sep 02:40 52 90 open - no hourly record
27 Aug 11:28 50 90 open - no hourly record
17 Aug 15:07 51 90 open - -
How readings and alerts work

A reading and an hourly record are different things, and most charts here hold more of the second missing than present. dibs has taken readings of a section since long before it began keeping an hour-by-hour log of when it looked, so the empty stretches are dibs saying it was not keeping that log yet, not that it looked and found nothing. That is the age of the record and not a fault.

Seat counts show the last successful read, not live availability. Refreshes can be delayed by request limits or upstream interruptions. Watched sections receive priority, but an hourly update for every section is not guaranteed.

The registrar can change a seat count between our checks. Alerts depend on dibs detecting an opening and completing delivery; a quiet watch does not prove that no seat opened. Check the registrar before enrolling.

Class chat

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