An RC low-pass filter is useful because it filters out
A. frequencies within a mid range only
B. high frequencies
C. low frequencies
Answer: B
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____________________ leakage is post-combustion gas that leaks into the crankcase.
Fill in the blank(s) with the appropriate word(s).
In some problems, the base and rate are given and the percentage must be found. First, express the rate (percent) as an equivalent ____________________.
Fill in the blank(s) with the appropriate word(s).
The purpose of contactor 2M shown in Figure 3 is to _____.
a. short motor leads T4, T5, and T6 during starting to connect motor windings in a wye configuration b. energize motor leads T1, T2, and T3 for both wye and delta connections c. energize motor leads T4, T5, and T6 during running to connect the motor windings in a delta configuration d. connect resistors in series with the motor windings during the transition from start to run
The subsequent problems deal with the circuit below where all voltage sources are dc and the circuit is assumed to be in steady state. Also, R1 = R2 = R3 = R4 = R.
If R3 is replaced by an closed (short) circuit and I2 is known, the current through R2 will be
A. I2 / 2 B. 0 C. ?I2 D. I2 E. 2I2