When preparing a bid you should avoid which of the following?
a. Writing calculations on both sides of estimate
sheets.
b. Doublechecking your math.
c. Rounding only your final total.
d. Marking off areas on a plan after you have done
a takeoff.
a. Writing calculations on both sides of estimate
sheets.
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The ____________________ affects the growth of microbes in the rumen
Fill in the blank(s) with the appropriate word(s).
When an externally supplied shielding gas is added to provide the needed protection of the molten weld pool, it is called ____________________.
Fill in the blank(s) with the appropriate word(s).
To convert serial data into parallel data you could use ________
A) a multiplexer B) a demultiplexer C) a comparator D) None of the above
A separately excited DC motor has the following parameters:
Ra = 0.1 ? R f = 100 ? La = 0.2 H L f = 0.02 H Ka = 0.8 K f = 0.9 An inertial load has J = 0.5 kg-m2 and b = 2 N-m-s/rad. No external load torque is applied. a. Sketch a diagram of the system and derive the (three) differential equations. b. Sketch a simulation block diagram of the system (you should have three integrators). c. Code the diagram, using Simulink. d. Run the following simulations: Armature control. Assume a constant field with Vf = 100 V; now simulate the response of the system when the armature voltage changes in step fashion from 50 to 75 V. Save and plot the current and angular speed responses. Field control. Assume a constant armature voltage with Va = 100 V; now simulate the response of the system when the field voltage changes in step fashion from 75 to 50 V. This procedure is called field weakening. Save and plot the current and angular speed responses.