Technician A says that a deployed airbag can be repacked, reused, and reinstalled in the vehicle. Technician B says that a deployed airbag should be discarded and replaced with an entire new assembly. Who is right?
A) A only B) B only C) Both A and B D) Neither A nor B
B
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Moving into the twentieth century, there was a new interest in public health, rising real estate values, and improvements in electric- and gasoline-powered alternatives to horsepower. These all combined to mark the rapid increase of the horse's significance in the city.
Answer the following statement true (T) or false (F)
The water tank in Figure E-2 is filled by an inflow x(t) and is emptied by an outflow y(t). The outflow is controlled by a valve which offers resistance R to the flow of water out of the tank. The water depth in the tank is d(t) and the surface area of the water is A, independent of depth (cylindrical tank). The outflow is related to the water depth (head) by y(t) = d(t)/R.
The tank is 1.5 m high with a 1m diameter and the valve resistance is 10 s/m².
(a) Write the differential equation for the water depth in terms of the tank dimensions and valve resistance.
(b) If the inflow is 0.05m³ /s , at what water depth will the inflow and outflow rates be equal, making the water depth constant?
(c) Find an expression for the depth of water versus time after 1m³ of water is dumped into an empty tank.
(d) If the tank is initially empty at time t=0 and the inflow is a constant 0.2 m³/s after time t = 0 at what time will the tank start to overflow?
Port fuel-injection systems generally use what type of injector driver?
A) Peak and hold B) Pulsed C) Pulse-width modulated D) Saturated switch
Although shielding gases are not toxic, they _____
a. are highly explosive b. can decompose into toxic gases c. can displace oxygen when released in a large quantity d. cause rapid metal corrosion