CLASS SECTION/SCHEDULE (FRI-AM, FRI-PM, SAT-AM, SAT-PM, SUN-AM, SUN-PM)

1.

Find the components in the x, y, u and v directions of the force P = 10 kN shown in Fig.

A. Px = 6N Py = 7N

B. Px = 9N Py = 8N

C. Px = 8N Py = 6N

D. Px = 6N Py = 2N

A

B

C

D

2.

The body on the 30° incline in Fig. is acted upon by a force P inclined at 20° with the horizontal. If P is resolved into components parallel and perpendicular to incline and the value of the parallel component is 1800 N, compute the value of the perpendicular component and that of P.

A. P = 2800N

B. P = 2700N

C. P = 2900N

D. P = 300N

A

B

C

D

3.

The cantilever beam shown in Figure is built into a wall 2 ft thick so that it rests against points A and B. The beam is 12 ft long and weighs 100 lb per ft.

A

B

C

D

4.

The weight W of a traveling crane is 20 tons acting as shown in Figure. To prevent the crane from tipping to the right when carrying a load P of 20 tons, a counterweight Q is used. Determine the value and position of Q so that the crane will remain in equilibrium both when the maximum load P is applied and when the load P is removed.

A. Q = 20,000 kg; x = 6ft

B. Q = 17 tons; x = 3ft

C. Q = 12 tons; x = 6ft

D. Q = 17,000 kg; x = 6ft

A

B

C

D

5.

As shown in Figure, a homogeneous cylinder 2 m in diameter and weighing 12 kN is acted upon by a vertical force P. Determine the magnitude of P necessary to start the cylinder turning. Assume that μ = 0.30.

A. P = 3KN B. P = 0.5KN C. P = 10KN D. P = 6KN

A

B

C

D

6.

The dimensions of the T-section of a cast-iron beam are shown in Figure. How far is the centroid of the area above the base?

A. Y = 8.07 “ B. Y = 4.08” C. Y = 3.07” D. Y = 1.11”

A

B

C

D

7.

Compute the forces in bars AB and DF of the scissors truss shown in Figure.

A. AB = 70.75 kN compression ; DF = 9.60 kN compression

B. AB = 70.75 kN compression ; DF = 42.45 kN compression

C. AB = 10.75 kN compression ; DE = 19.60 kN compression

D. AB = 700.75 kN compression ; DE = 90.60 kN compression

A

B

C

D

8.

It is a structure which is composed completely of axial members that are assumed to be weightless.

A. Ideal Truss

B. Roller support

C. Hinge

D. Howe truss

A

B

C

D

9.

The structure shown in Figure is hinged at A and C. Find the horizontal and vertical components of the hinge force at B.

A

B

C

D

10.

A bar AE is in equilibrium under the action of the five forces shown in Figure below. Determine T.