Caution on a pesticide label indicates what level of chemical toxicity?
a. 3 or 4 (III or IV) c. 5 or 6 (V or VI)
b. 1 or 2 (I or II) d. 4 or 5 (IV or V)
A
3 or 4 (III or IV)
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Answer the following statement(s) true (T) or false (F)
1. When a DC motor starts, the generated counter emf across the armature is low. 2. A field accelerating relay is used with starters to control low-cost speed motors. 3. A field failure relay is a single-pole control relay. 4. Time limit acceleration has the disadvantage that the resistors might remain in the circuit and could burn out. 5. Time limit controllers can drive pumps, fans, and compressors.
The home lighting chart should include every fixture, its location, the number of light bulbs or tubes it contains, and the ____________________ of each one.
Fill in the blank(s) with the appropriate word(s).
Answer the following statement(s) true (T) or false (F)
1. Since electrons are negatively charged particles and protons are positively charged particles, they repel each other. 2. The hydrogen atom contains one proton and one electron. 3. The orbit in which the electron exists is determined by the electron’s weight times its speed times the diameter of the orbit. 4. Electricity is composed of electrons. 5. The atoms of an insulator generally contain seven or eight valence electrons.
The sum of two numbers is 13. Five times one number is equal to eight times the other number. Find the two numbers.
Fill in the blank(s) with the appropriate word(s).