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The following data have been collected:

Which of the following statements is true?

(A) The median and the mode are equal.

(B) The mean and the median are equal.

(C) The mean and the mode are equal.

(D) The mean is larger than both the mode and the median.

An 18 wheeler has a mass of 28,000 kilograms when fully loaded. The truck goes from 0 to 90 kilometers per hour in 120 seconds. What is the force on the 18 wheeler due to acceleration?

（A）1.08 kN （B） 15.82 kN （C） 10.71 kN （D） 5.83 kN

Correct Answer: D

What is the elongation of a 2 meter aluminum bar when it has been stressed to 512 MPa? (E = 69 GPa)?

(A) 1.5 cm (B) 2.0 cm (C) 1.0 cm (D) 1.7 cm

Correct Answer: A

You are tasked with identifying where the stress concentrations may appear on a support beam. Of the following locations which will not have a stress concentration? I Near concentrated loads II. Close to discontinuities of the beam III Where distributed loads occur.

(A) II & III (B) II (C) I & II (D) III

Correct Answer: D