Convert 200° Rankine to Kelvin
A) 200 + 460 = 660°K B) 200 × 1.8 = 360°K C) 200 + 273 = 473°K D) 200/1.8 = 111.11°K
D
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? Identify and state the historical significance of patronage.
What will be an ideal response?
Read the setting in inches on the 0.001-inch micrometer scale in the accompanying figure.
A. 0.910 B. 0.922 C. 0.949 D. 0.965
A 220 V, 1500 rpm, 11.6 A (armature current), separately excited motor is controlled by a single-phase, full-wave SCR converter. The armature resistance of the motor is 2 ?. The ac source voltage is 230 V (rms) 60 Hz. Enough inductance is added to ensure continuous conduction for any torque greater than 25% of rated value. (Ignore the the rotational losses.)
a. Calculate the triggering angle for a speed of 1000 rpm at rated torque. b. Assuming that the torque is a fan-type, calculate the triggering angle for a motor speed of 900 rpm. c. Sketch the speed-torque characteristics showing the operating points of cases (a) and (b).
The scale 6" = 12" is called ____ scale.
A. one-eighth B. one-quarter C. half D. double-size