【简答题】In the circuit below, VD1 and VD2 are ideal diodes . When ui=7V, uo=_______V ; When ui=-2V, uo=________V ; When ui=-7V, uo=_______V;
【简答题】In the circuit below, let【图片】 have a peak value of 10 V and R = 1 kΩ. The peak value of【图片】is mA【图片】
【多选题】Observed phases during optical microscopy observation of iron and steel include ().
【简答题】In the circuit below, the diode is ______ biased. When applying ideal mode for the diode, Uo1=______ V . When applying constant forward voltage mode, Uo1=________V.
【单选题】During UMS rounds, a duty engineer notices that the fuel oil overflow observation glass is full of oil. Should he ____.
A.
Stop all F.O. transfers immediately, and inform the chief engineer.
B.
Make a sounding of the F.O. overflow tank and decide if there is enough capacity to leave it until the following morning.
C.
Call a motorman and have him sound the F.O. overflow tank periodically during the night.
D.
start the F.O. purifier