Answer:
D. NESC
Explanation:
first of all what's the meaning of NESC:
NESC: National Electrical Safety Code
The National Electrical Safety Code is a United States standard of the safe operation, maintenance, and installation of communication ,
utility system and electric power.
Which includes the following.
1.) power and communication underground lines
2.)power and communication overhead lines,
3.) Power substations
NESC are the ones to tell us the type of installation to use for a particular operation and particular location.
For both safety purposes and to reduce life hazard and community hazard due to elect item.
Which of the following is the last step in creating a budget?
A. Identify income
B. Identify variable expenses
C. Identify fixed expenses
D. Determine savings or debt
Answer:
D. Determine saving or debt
Explanation:
2. What is the charge, expressed in micro coulombs on two equally and similarly charges spheres placed in air with their centres 30 cm apart repelling each other with a force of 120 mgm.
Answer:
q = 0.1086 micro Coulombs
Explanation:
By Coulombs law, we have;
[tex]F =k \times \dfrac{ q_1 \times q_2}{r^2}[/tex]
Where;
F = The electric force = 120 mgm
q₁ and q₂ = Charge
r = The separating distance = 30 cm = 0.3 m
k = 8.9876×10⁹ kg·m³/(s²·C²)
Where, q₁ and q₂, we have;
[tex]F =k \times \dfrac{ q^2}{r^2}[/tex]
Whereby the force is the force of 120 milligram mass, we have;
0.00012 × 9.81 = 000011772 N
[tex]q = \sqrt{ \dfrac{ F\times r^2}{k}}[/tex]
Substituting the values, we have;
[tex]q = \sqrt{ \dfrac{ 000011772 \times (0.3)^2}{8.9876 \times 10^9}} = 1.086 \times 10 ^{-7} \ Coulombs[/tex]
q = 0.1086 micro Coulombs.
Steam enters an adiabatic turbine at 8 MPa and 500 C with a mass flow rate of 3 kg/s andleaves at 30 kPa.The isentropic efficiency of the turbine is 0.90. Neglecting the kinetic energy change of the steam, determine (a) the tem-perature at the turbine exit and (b) the power output of theturbine
Answer:
(a) The exit temperature = 69.1°C
(b) The power output = 8.3 MW
Explanation:
(a) The enthalpy of steam at 8 MPa and 500°C is given (from online sources) as h₁ = 3399 kJ/kg
The exit temperature = The saturation temperature at 30 kPa = T₄ = 69.096 + 273.15 = 342.246 K
The exit temperature = 69.1°C
(b) The mass flow rate = 3 kg/s
The isentropic efficiency = 0.9 = (h₁ - h₂)/(h₁ - h₂[tex]_s[/tex])
s₁ = 6.727 kJ/kgK
h₂[tex]_s[/tex] = 289.229+ 2335.32* (6.8235 - 6.727 )/6.8235 = 322.26 kJ/kg
Therefore, h₂ = h₁ - (h₁ - h₂[tex]_s[/tex])*0.9
h₂ = 3399 - (3399 - 322.26 )*0.9 = 629.934 kJ/kg
The power output = [tex]\dot m[/tex](h₁ - h₂) = 3 *(3399 - 629.934) = 8307.2 kJ/s =
8.3 MW.
A ____ is marked by two sets of double yellow lines, with each set having a broken line on the inside, and a solid line on the outside. white arrows appear in this lane as well.
Answer:
center left-turn lane
Explanation:
A center left turn lane will be marked as described. The arrows, if present, generally indicate that left turns are permitted from the lane with these markings.
__
If the double yellow lines are solid, they are considered to be a "barrier" and are not to be crossed.
Answer:
center left-turn lane
Explanation:
Question 6: Which of the following is NOT true if you are changing into a
turning lane?
You should activate your signals 100 feet beforehand
You should activate your signals when you get into the turn lane
You should activate your signals before you get into the turn lane
You should use your hands to signal if your lights do not work
Answer:
You should activate your signals 100 feet before you turn, becuase of that you should not wait until you are turning to turn on your signals. If you do not have working lights use your hands. So the answer that is inccorect is B.
You should activate your signals when you get into the turn lane is NOT true
Because you are supposed to single beforhand not while you're in the lane.
Im taking my drivers ed too. :)
Prescription eye protection suitable for an electrician should always include a. a safety strap b. soft nose guards c. side shields d. tinted lenses
Answer:
The correct option is;
Side shields
Explanation:
Electricians working at a construction site are exposed to arc flashes and sparks which can enter into the eyes causing painful sensation as such a prescription eye protection suitable for an electrician according to OSHA regulations the employer should ensure that the electrician makes use of eye protection that has side protection in situations that include hazards from flying objects.
You are driving a vehicle that has an automatic transmission. When you park on a hill, you
should
A: Set the parking brake first, before you shift the transmission into Park.
B: Shift the transmission into Park, and leave the parking brake off.
C: Set the parking brake, and shift the transmission into Neutral.
Answer:
The answer is A. Set the parking brake first, before you shift the transmission into Park.
An automatic gearbox is a multi-speed transmission system. The correct option is A.
What is the automatic transmission?An automatic gearbox is a multi-speed transmission system that is used in internal combustion engine-powered motor vehicles that do not require any driver input to change forward gears. Thus, making the process of shifting gears automated.
The correct way to park an automatic transmission vehicle is to set the parking brake first before you shift the transmission into Park. Therefore, the correct option is A.
Learn more about Automatic Transmission:
https://brainly.com/question/14093047
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If sail boats A and B are approaching each other with the wind on different sides, why is vessel A considered the give-way vessel (vessel that must take early and substantial action to avoid a collision)?
Answer:
The reason is because when the wind approaches each sailboat from a different side, the sailboat that the wind approaches from the port side, which is the left side is the give-way vessel.
Whereby the wind approaches the vessel A from the port (left) side then vessel A is considered the give-way vessel
The give-way vessel is the vessel that will have to take expeditious steps to create access for the other vessels by either changing course, stopping, or moving with reduced speed
Explanation:
what kind of line is used to indicate the supporting beam
Answer:horizontal
Explanation: because it is supporting it
