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Which of the following can not be equal to 1 mol of the substance at standard conditions?

(A)20 grams of water

(B) 6.02 x 1023 molecules of Uranium

(C) 28 grams of N2

(D) 22.4 liters on Argon

The Correct Answer

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

A heavy roller is held in equilibrium on a frictionless Plane AB by the force F, as shown. Which diagram correctly shows a vector polygon of the forces acting on the roller?

(A) Option A

(B) Option B

(C) Option C

(D) Option D

Correct Answer: C

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

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