What is NOT considered personal safety equipment?
A) Rubber gloves B) Air impact wrench C) Hearing protection D) Safety glasses
B
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A hair dryer is basically a duct in which a few layers of electric resistors are placed. A small fan pulls the air in and forces it to flow over the resistors, where it is heated. Air enters a 1200-W hair dryer at 100 kPa and 22°C and leaves at 47°C. The cross-sectional area of the hair dryer at the exit is 60 cm2. Neglecting the power consumed by the fan and the heat losses through the walls of the hair dryer, determine (a) the volume flow rate of air at the inlet and (b) the velocity of the air at the exit.
What will be an ideal response?
An HVAC pressure transducer measures ______ pressure
A) Atmospheric B) Oil C) Interior D) Refrigerant
What type of head do most sheet-metal screws have?
A) Round head B) Hex head C) Pan head D) Countersunk head
Which substance is not found in CFC refrigerants?
a. Chlorine b. Carbon c. Fluorine d. Hydrogen