The speed of a DC motor that requires a constant torque is controlled by adjusting the __________.
A. field current and keeping the armature voltage constant
B. armature voltage and keeping the field current constant
C. armature voltage and the field current
Answer: B
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The ostrich's stride can range from 5 to over 10 feet.
Answer the following statement true (T) or false (F)
What do the letter "T" and the letter "H" following the four digit designation for aluminum represent?
A) Temper and heat treatment B) Tested and strain hardened C) Solution heat treatment and strain hardening D) Titanium alloyed with aluminum and hardened
If an air-cooled condenser is located on a 95°F roof and the condenser saturation temperature is 150°F, which of the following is a possible scenario?
A. The system is overcharged. B. The condenser is clogged. C. The system is undercharged. D. Both a and b are correct.