Astronomy quiz question: Cepheus to highest position in sky

Astronomy 210 Quiz 1, fall semester 2014
Cuesta College, San Luis Obispo, CA

The diagram at right shows the position of the constellation Cepheus as seen on December 31 by an observer in San Luis Obispo, CA. Ignore daylight saving time. Assume you can see stars in daylight. Cepheus will be at its highest point in the sky __________ after the view shown at right.
(A) 5 hours.
(B) 7 hours.
(C) 9 hours.
(D) 12 hours.

Correct answer (highlight to unhide): (A)

Using a starwheel (planisphere), the sky as shown is 10:00 AM on December 31. Cepheus will be above Polaris at 3:00 PM on the same day, December 31, approximately five hours later.

Section 70158
Exam code: quiz01s7e8
(A) : 28 students
(B) : 7 students
(C) : 3 students
(D) : 4 students
(No response: 1 student)

Success level: 64% (including partial credit for multiple-choice)
Discrimination index (Aubrecht & Aubrecht, 1983): 0.69