Category: Engineering

What does an envelope detector do? An envelope detector can be used to demodulate a previously modulated signal by removing all high frequency components of the signal. The capacitor and resistor form a low-pass filter to filter out the carrier frequency. Which of the following modulated signals can be detected by an envelope detector? Envelope […]

What are control points in Bezier curve? A Bézier curve is defined by a set of control points P0 through Pn, where n is called its order (n = 1 for linear, 2 for quadratic, etc.). The first and last control points are always the end points of the curve; however, the intermediate control points […]

What are common types of caught in and caught between hazards? “Caught in-between” hazards kill workers in a variety of ways. These include: cave-ins and other hazards of excavation work; body parts pulled into unguarded machinery; standing within the swing radius of cranes and other construction equipment; caught between equipment & fixed objects. Which of […]

What was your most embarrassing moment? One of the most embarrassing moments anyone can go through may consist when tripping while you are walking up the stairs. I can’t tell you how many times I have been walking up the stairs in high school or even in my own house, and the slight slip of […]

How do I get OSHA 500 certified? OSHA #500 Trainer Course in OSHA Standards for the Construction Industry or OSHA #501 Trainer Course in OSHA Standards for General Industry, three (3) years safety training experience, and completion of the 40-hour HAZWOPER training. Is OSHA 510 the same as 30 hour? OSHA #510 Occupational Safety and […]

What are yellow lines used for? YELLOW LINES mark the center of a two-way road used for two-way traffic. You may pass on a two-way road if the yellow centerline is broken. When a solid and a broken yellow line are together, you must not pass if you are driving next to the solid line. […]

What happens when a diode is forward biased? A forward bias has an anode voltage that is larger than the cathode voltage. Forward bias decreases a diode’s resistance, and reverse bias increases a diode’s resistance. The current flows effortlessly while in forward bias, but reverse bias does not permit current to flow through the diode. […]

What is the formula of cross sectional area? The area of that cross section is the well known A = pi*R² which is colloquially pronounced as “pie are squared.” We will put aside the old joke that “Pie are not squared; pie are round” but we have to admit to ourselves that expressing area and […]

What do regulatory signs tell drivers? Regulatory traffic signs are white with black or red letters instructing road users what they must or must not do under certain conditions. Regulatory signs indicate and reinforce traffic laws and regulations which apply either permanently or at specified times or places. What is the function of regulatory road […]

Is PCM and ECU the same? Generally, ECM, PCM, and ECU refer to the same thing – an Engine Computer. However, there is a fine line between these terms. In most occasions the term ECU applies to Asian car manufacturers, whereas ECM and PCM usually represent to Chrysler computers. What are the symptoms of a […]