¿Qué tipo de cabeza de tornillo se utiliza en los atornilladores eléctricos?
a. Hexagonal
b. Ranurada
c. Allen
d. Phillips
c. Allen
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The primary power source for a vibratory pile hammer is _____.
a. gravity b. a pneumatic power pack c. a hydraulic power pack d. an electric motor
Which of the following is NOT a reason that most dimensions and tolerances are shown in decimal form:
A. Decimals are easier to work with B. Decimals provide tighter tolerances than fractions could C. Machine tools are graduated in decimal form D. Measuring tools are in decimal form
An AND gate is checked for operation and the following readings are taken on the gate: input A = 0.2V, input B = 4.5V, input C = 0.4V, output = 4.9V. What might be wrong with the gate?
A) Nothing is wrong with the gate. B) Input C is too high. C) The output is too low: it should be 5v. D) The output is stuck high; the chip is bad.
74LS00 is a:
A) Quad 2-input NAND gate. B) Quad 2-input AND gate. C) Quad 2-input OR gate. D) Single 8-input OR gate.