ITEMS CONFIRMED A+
◉ Solve for x:
x2(squared) − 4 = 21
move constant to isolate x
x2 = 4 + 21
x2 = 25
sq root of 25 = 5 Answer: x = ±5
◉ Moulding comes in strips that are 10 ½ ft. long. An office at
headquarters is being renovated and the moulding is being replaced.
The office has two walls that are 10 ¼ ft., one wall that is 15 ¼ ft.,
and the wall with the door in the center has length 5 ⅛ ft. on either
side. If 5 strips are to be used for this job and assuming there is no
waste, how much will be left over? Answer: 6 ½ ft.
◉ The temperature of a heating coil is 40 ◦C. What is the
corresponding temperature in ◦F?
Fahrenheit = Celsius x 9/5 + 32 Answer: 104◦F
◉ 1/3x = 4
,solve x
3 times 1/3x = 4 times 3
x = 12 Answer: 12
◉ How does a GFCI protect a worker using a power tool? Answer: It
removes power if leakage current develops in the cord or tool
◉ A wet surface can act as a conductor. Answer: True
◉ How often should the ground conductor be checked for
continuity? Answer: Every 90 days
◉ Of the following choices, which will cause current to flow, causing
an electrical shock? Answer: Contacting a live conductor and ground
◉ What precaution should be taken when performing cleaning
operations on elevator electrical equipment? Answer: Remove
power and Lockout and Tagout
◉ Which of the following statements is true regarding the use of
portable work lights? Answer: Only use portable lights with guards
,◉ Contacting electrical voltage while you are isolated from other
conductors produces current flow that causes electrical shock.
Answer: False
◉ Which of the following would not result in electrocution? Answer:
Contacting two separate grounded surfaces
◉ How can the third wire of an extension cord best be described?
Answer: It prevents the case or chassis of the supplied device from
becoming hot
◉ What should be done if a coworker is in contact with a live circuit?
Answer: Remove power or safely remove the victim from the source
◉ Which of the following can be caused by even a slight electrical
shock? Answer: Injury due to involuntary movements
◉ The severity of electrical shock is greatly increased in the
presence of which of the following? Answer: Moisture
◉ What is the unit that measures the quantity of electrons passing a
given point? Answer: Coulomb
, ◉ What happens to the total resistance in a wire, if its cross-
sectional area is increased by four times? Answer: The resistance is
one-fourth
◉ A neutral atom has which of the following characteristics?
Answer: There is an equal number of protons and electrons
◉ What is the outermost shell of an atom called? Answer: Valence
shell
◉ What unit is used to measure the opposition to current flow?
Answer: Ohms
◉ The symbol E is used to represent which of the following in
electricity? Answer: Voltage
◉ In an electrical circuit, what is the name of the unit used in
measuring the potential difference across two
points in a circuit? Answer: Volt
◉ Which of the following statements is correct about charges
between atoms? Answer: Unlike charges attract each other