The direct-spark ignition system ________
A) provides a spark to the thermocouple
B) provides a spark to start the pilot flame
C) provides a spark to start the main flame
B
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Answer the following statement(s) true (T) or false (F)
1. The wiring of the accelerating starters and the design of the resistor sections are meant for speed regulation. 2. The operation of accelerating contactors is controlled by a timing device. 3. A wound rotor motor can be reversed by interchanging any two stator leads. 4. Accelerating timers may be used to control the acceleration of wound rotor motors. 5. Frequency relays have the advantage that an increase in motor load prolongs the starting time.
Most dual-voltage motors bring out ____ "T" leads at the terminal box.
A. three B. six C. nine D. ten
In a plywood panel, the grain direction in adjacent veneers is at right angles to each other, referred to as cross-graining of veneers. Cross-graining equalizes the panel strength in the two principal directions of the panel. Does it mean that a plywood panel (typical size is 4 ft × 8 ft) is equal in strength in its long and short directions?
What will be an ideal response?
To prevent ____, fuses or circuit breakers are used in series with each house circuit.
a. internal friction b. a short circuit c. a path of high resistance d. an open circuit