Total pressure readings are taken on a duct system by:
A) Subtracting the velocity pressure reading from the static pressure reading.
B) Pointing the pressure-sensing tube perpendicular to the air stream.
C) Pointing the pressure-sensing tube into the airstream.
D) Adding the static pressure reading and the total pressure reading.
C
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Los conductos suelen aislarse para _____.
a. conservación de la energía b. proteger el metal c. controlar la condensación d. La a y la c son correctas.
What is the difference between bonnet capacity and firing rate?
A) Bonnet capacity is the amount of heat consumed while firing rate is the amount of heat delivered. B) They are essentially the same thing–the amount of heat consumed. C) Firing rate is the amount of heat consumed while bonnet capacity is the amount of heat delivered. D) They are essentially the same thing–the amount of heat delivered.
The standard lengths of air hoses to be used in conjunction with compressors for pneumatic tools are ________
A) 50 and 100 feet B) 25 and 75 feet C) 100 and 150 feet D) 25 and 50 feet
The inside diameter of the pipe will be reduced and flow restricted if the root pass has _____
a. too little penetration b. excessive root reinforcement c. excessive concavity d. incomplete fusion