What is the difference between the way a self-threading and a self-drilling sheet metal screw is used?
What will be an ideal response?
Self-threading sheet metal screws must have a pilot hole drilled into the metal before these screws are used and a self-drilling sheet metal screws pre-drill the hole as the screw goes in.
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Suppose a ball-screw mechanism that enables a resolver to make linear measurements causes its rotor to make one revolution for every one-half inch it moves. If the resolver produces 4,000 feedback units per revolution, how far has its horizontal element moved if the count is 16,800?
What will be an ideal response?
The output frequency of a 555 astable multivibrator can be increased by
A) decreasing the value of the external timing capacitor. B) increasing the value of the external timing capacitor. C) triggering at a higher rate. D) increasing the values of the external timing resistors.
Before using a voltmeter, always ____.
A. Zero the ohms adjustment. B. Touch the two leads together to insure continuity. C. Set the range selector to a setting higher than the voltage you expect to read. D. Turn off the power.
Three stages of human reaction to stress are: 1) alarm, 2) resistance, and 3) exhaustion.
Indicate whether the statement is true or false.