CWEA MECHANICAL TECHNOLOGIST
GRADE 3 FINAL PAPER UPDATED
QUESTIONS VERIFIED COMPLETE
ANSWERS 100 PERCENT CORRECT
◉ If 17.32v are applied across a resistance of 50 ohms, how much
power is expended in the resistor?
Answer: 6 Watts
Volt = amp x ohms
17.32 = amp x 50
17.32/50 = 0.34 = amps
Watts = volts x amps
Watts = 17.32 x 0.34
Watts = 6
◉ A standard steel plate is 4ft x 8ft x 1 inch thick. If steel weighs 490
lbs/ft^3, what is the total weight of this plate?
Answer: 1/12 = 0.083
,4 x 8 x 0.083 = 2.656
2.656 x 490 = 1,301.44 lbs
◉ What is the volume in cubic feet of carbon media that is 6 feet
thick in a clarifier that has a 50 foot diameter and is 20 feet deep?
Round the answer to the nearest cubic foot
Answer: 0.785 x 50 x 50 x 6 = 11,775 ft^3
◉ A 150 watt, 120 volt lamp burns constantly for 8 hours at a rated
voltage. What is the energy used in watts/hour?
Answer: 1,200 Watts/hour
◉ The property of an electrical circuit restricts the flow of current
and .......
Answer: resistance
◉ What can burn the insulation on supply connections at the motor
starter?
Answer: The connections are loose or have poor contacts
◉ Where do you start troubleshooting when an electric motor fails
to operate?
, Answer: At the power source
◉ What does NEC stand for?
Answer: National Electrical Code
◉ What is a pipe union typically used for?
Answer: to connect pipe
◉ What is a parallel circuit?
Answer: circuit that has more than one path for electric current to
flow
◉ What is a series circuit?
Answer: A circuit that has only one path for the electric current to
flow.
◉ What can cause an overloading of an electrical circuit?
Answer: Connecting loads that draw too much current
◉ What type of current is stored in a 9-volt battery?
Answer: A Direct current
GRADE 3 FINAL PAPER UPDATED
QUESTIONS VERIFIED COMPLETE
ANSWERS 100 PERCENT CORRECT
◉ If 17.32v are applied across a resistance of 50 ohms, how much
power is expended in the resistor?
Answer: 6 Watts
Volt = amp x ohms
17.32 = amp x 50
17.32/50 = 0.34 = amps
Watts = volts x amps
Watts = 17.32 x 0.34
Watts = 6
◉ A standard steel plate is 4ft x 8ft x 1 inch thick. If steel weighs 490
lbs/ft^3, what is the total weight of this plate?
Answer: 1/12 = 0.083
,4 x 8 x 0.083 = 2.656
2.656 x 490 = 1,301.44 lbs
◉ What is the volume in cubic feet of carbon media that is 6 feet
thick in a clarifier that has a 50 foot diameter and is 20 feet deep?
Round the answer to the nearest cubic foot
Answer: 0.785 x 50 x 50 x 6 = 11,775 ft^3
◉ A 150 watt, 120 volt lamp burns constantly for 8 hours at a rated
voltage. What is the energy used in watts/hour?
Answer: 1,200 Watts/hour
◉ The property of an electrical circuit restricts the flow of current
and .......
Answer: resistance
◉ What can burn the insulation on supply connections at the motor
starter?
Answer: The connections are loose or have poor contacts
◉ Where do you start troubleshooting when an electric motor fails
to operate?
, Answer: At the power source
◉ What does NEC stand for?
Answer: National Electrical Code
◉ What is a pipe union typically used for?
Answer: to connect pipe
◉ What is a parallel circuit?
Answer: circuit that has more than one path for electric current to
flow
◉ What is a series circuit?
Answer: A circuit that has only one path for the electric current to
flow.
◉ What can cause an overloading of an electrical circuit?
Answer: Connecting loads that draw too much current
◉ What type of current is stored in a 9-volt battery?
Answer: A Direct current
