Male toads are smaller than the female, which is common among toads
a. True
b. False
Indicate whether the statement is true or false
False
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Joint reinforcement in CMU walls generally consists of _______.
A) two parallel wires without cross wires. B) a single wire. C) two parallel wires connected together by cross wires. D) three parallel wires connected together by cross wires. E) none of the above.
A dc, separately excited motor is connected to a fan-type load. The armature circuit of the motor is connected to a full-wave, ac/dc SCR converter. The input voltage to the converter is 200 V (rms). The triggering angle of the converter is adjusted for a motor speed of 500 rpm. The armature current in this case is 16 A. The armature resistance of the motor is 0.5? , and the field constant (K? ) is 2.5
a. Calculate the triggering angle to run the motor at 500 rpm. b. If the motor speed is to be reduces to 100 rpm, what is the triggering angle?
In a technique known as ____, the designer repeatedly analyzes both the hydraulic and thermal performance of a system using “candidate” hardware options and operating conditions, until a combination is found that yields acceptable heat distribution.
a. trial and error b. selective pairing c. elimination d. iteration
Answer the following statement(s) true (T) or false (F)
1. When used as a pulse timer, the 555 timer is connected differently than the 555 timer that is used as an oscillator.
2. In a 555 circuit used as a pulse timer, the capacitor is charged by the Vcc and not from a feed-back circuit from the output of the timer.
3. In the accompanying figure, transistor Q2 is used to turn relay coil K1 on or off.
4. In the accompanying figure, once capacitor C1 has been charged, it is prevented from discharging through resisters R3 and R4.
5. In the accompanying figure, pin #2 is connected to pin #6, which is at ground potential.