As a general rule, equipment installed in a Class II location must be ____.
A. dustproof
B. explosionproof
C. waterproof
D. dust-ignitionproof
Answer: D
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Answer the following statement(s) true (T) or false (F)
1. Compared to thermocouples, RTDs are less repeatable and less stable. 2. The pressure switch is used to transfer information concerning pressure to an electrical circuit. 3. With the use of programmable controllers in industry, the measurement of pressure has become much less important. 4. In application, the pressure switch contact may be substituted for the limit switch contact. 5. In some cases position information must be reliable to .001 inch or less.
Liquid water, with a density of 62.4 lbm/ft3, flows with a volumetric flow rate of 1.25 ft3/s through a circular pipe with a diameter of 3 in. Determine the velocity and mass flow rate of the water.
Given: p= 1000 kg/m3, V = 8.5 m/s, D = 42.0 mm = 0.042 m What will be an ideal response?
In the accompanying figure, the sum of the measures of angle 3 and angle 4 is ____o.
A. 120 B. 90 C. 80 D. 45
Which of the following factors about the target determines the ability of a capacitor to detect its presence?
A. dimension B. shape C. distance from the head D. position E. all of the above