Which type of motors are typically driven by DC drives?
A. series wound
B. shunt wound
C. compound motors
D. permanent magnet
E. both b and d
Answer: E
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During the ____ stage the piston rises and compresses the air-fuel mixture.
A. intake B. compression C. power D. exhaust
A rubber object is in contact with nitrogen (N2) at 298 K and 250 kPa. The solubility of nitrogen gas in rubber is 0.00156 kmol/m3•bar. The mass density of nitrogen at the interface is
(a) 0.049 kg/m3 (b) 0.064 kg/m3 (c) 0.077 kg/m3 (d) 0.092 kg/m3 (e) 0.109 kg/m3 T=298 [K] P_N2_gasside=250 [kPa]*Convert(kPa, bar) S=0.00156 [kmol/m^3-bar] "Table 14-7" C_N2_solidside=S*P_N2_gasside M_N2=MolarMass(N2) rho_N2_solidside=C_N2_solidside*M_N2
Professional repair shops do not use ramps because ________
A) They can be used without having to block the wheels B) They can be used to raise only the rear of the vehicle C) They can be used to raise only the front of the vehicle D) They can "kick out" and are dangerous to use
The parallel combination of a 330 ? resistor and a 470 ? resistor is connected in series with the parallel combination of four 1 k? resistors. If a 100 V source is connected across the circuit, then which resistor carries the most current?
A) 1 k? B) 470 ? C) 330 ?