Analog distance sensors are available in photoelectric and ultrasonic configurations. Select the true statement
A) The photoelectric are the most accurate.
B) The ultrasonic are less sensitive to environmental conditions.
C) The photoelectric models have the greatest distance sensing capability.
D) Ultrasonic sensor have been developed quite recently.
A
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How would inclusion of the temperature change affect the value of ? as found in Part (a)?
(a) Water flows through the nozzle of a garden hose. Find an expression for ? in terms of line pressure 
ambient
pressure 
inside hose diameter 
and nozzle outlet diameter 
Assume steady flow, and isothermal, adiabatic operation. For liquid water modeled as an incompressible fluid,
for constant temperature.
(b) In fact, the flow cannot be truly isothermal: we expect 
owing to fluid friction. Hence, 
where C is the specific heat of water.
To speed the filing of long nails, first shorten them with a:
What will be an ideal response?
A typical IAT or ECT sensor reads about 3000 ohms when tested using a DMM. This resistance represents a temperature of about ________
A) -40°F (-40°C) B) 70°F (20°C) C) 284°F (140°C) D) 120°F (50°C)
While the PM coordinator is surveying the machine, it is a good idea for him or her to ____.
A. rope off the machine B. talk to the operator(s) C. inspect only the crucial parts of the machine D. inform the plant engineer