3 sensors are attached to a printing
device with three alarms attached to
the sensors. The first sensor A detects
if the device needs ink
the second sensor B detects if the
device needs repairs. The third sensor
C, delects of the device jams.
An alarm sounds of two or more or
more problems occur
(1) device a truth table for the system
2) Write an SOP expression for the
system & minimize it.

Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.