18-09
A- CHECK A (W6x9) STEEL SECTION FOR
COLUMNS OF THE STRUCTURE SHOWN.
K=1.0
Worc =1.5K/F
d=5 7/8"
(W12x26) BEAM
(W6x9) COL. (W6x9) COL
-FINISH FLOOR
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W6x9
A = 2.68 in2
rx= 2.41 in
ry= 0.905 in
B-CAN COLUMNS BE REPLACED WITH A (6x6 D. F. #1)
WOOD SECTION?

Amass of 1.5 kg of air at 120 kpa and 24°c is contained in a gas-tight, frictionless piston-cylinder device. the air is now compressed to a final pressure of 720 kpa. during the process, heat is transferred from the air such that the temperature inside the cylinder remains constant. calculate the boundary work input during this process.

Which of the following refers to refers to how well the control system responds to sudden changes in the system. a)-transient regulation b)- distributed regulation c)-constant regulation d)-steady-state regulation

Aquick transition of the operating speed of a shaft from its critical speed will whirl amplitude. (a) increase (b) limit (c) not affect (d) zero