The net positive suction head available (NPSHA) is a precise description of the state of the fluid, within a specific piping system, as it enters the circulator. It includes the effects of temperature, pressure, velocity, and the fluid’s ____ into a single number.
a. vapor pressure
b. flow
c. hydraulic equilibrium
d. compressibility
a. vapor pressure
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According to the NFPA, under what conditions is it acceptable to reset a fire alarm remotely when it is alarming?
a. It is acceptable if the panel has redundant confirmation. b. It is acceptable if the panel has cellular phone access. c. It is acceptable if the panel was manufactured after the 2005 NFPA code. d. It is never acceptable to reset a fire alarm remotely if it is alarming.
PROBLEM 3.74 Three shafts and four gears are used to form a gear train that will transmit power from the motor at A to a machine tool at F. (Bearings for the shafts are omitted in the sketch.) The diameter of each shaft is as follows: Knowing that the frequency of the motor is 24 Hz and that the allowable shearing stress for each shaft is 75 MPa, determine the maximum power that can be transmitted.
To thoroughly understand the plan, you should read all the plan notes.
Answer the following statement true (T) or false (F)
Glow plugs are used in diesel engines to:
A. Warm the engine oil B. Ignite the fuel C. Warm the intake air D. Warm the combustion chamber