What is the purpose of the discharge line thermostat?
A) To ensure that the discharge air is always warm in the heating cycle
B) To prevent the compressor from operating at temperatures that will cause oil breakdown and loss of lubrication
C) To shut off the compressor if the superheat gets too low
D) To keep the discharge air from exceeding 200°F in the heating mode
B
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For pipe 8 inches and smaller laid in dry trenches with a firm clay bottom, a pipefitter can push the pipe home with a _____.
a. bar or lever tool b. lead maul c. ratchet-jack tool d. 2 × 4
Answer the following statement(s) true (T) or false (F)
1. The brush polarity in a separately excited generator cannot be changed by reversing the rotation of the armature or the direction of the field current. 2. If both the armature direction and the direction of the field current change, the brush polarity remains the same. 3. The magnitude of the voltage depends on the rate at which the flux is cut. 4. Field control of the output voltage is accomplished by varying the total resistance of the field circuit with a field rheostat. 5. Brush polarity changes when the field current is zero.
What advantages and disadvantages does chemical pasteurization offer compared to steam?
What will be an ideal response?
Electrical feedback is usually a result of _________
A) Too high a voltage in circuit B) Too much current (amperage) in a circuit C) Lack of a proper ground D) Both A and B