4.06-4.07 Ag Mechanics 1

If electricity costs $0.15 per kilowatt-hour, how much does it cost to operate a router that requires 7.5 amperes of electricity and is used in a 120-volt electrical circuit for 2 hours?

• $0.27

• $0.68

• $1.75

• $12.31

If an electric motor requires 5 amperes of electricity and is designed to be used in a 120-volt electrical circuit, how many watts of current will that motor use in one hour?

• 0.25

• 24

• 600

• 900

A portable saw requiring 7.5 amperes of electricity is designed to be used in a 120-volt electrical circuit. How many kilowatts of current does this saw use in 1 hour?

• 900

• 500

• 0.9

• 0.5

Tags

NGSS.MS-PS3-4

A fuse is a:

• device used to overload a circuit

• device used to protect circuits from an overload of current

• plastic tool used in an ohmmeter

• tool used in place of pliers

What is the amperage rating of an electrical device that uses 8 kilowatts of electricity when operated for 10 hours in a 120-volt circuit?

• 5.00

• 5.33

• 6.67

• 8.00

Tags

NGSS.HS-PS2-5

If the local rate for electricity is $0.13 per kilowatt-hour, how much should the electric bill be for 120 kilowatt-hours?

• $2.50

• $6.80

• $10.20

• $15.60

A current-carrying conductor not under electrical pressure is a/an:

• circuit breaker

• hot wire

• insulator

• neutral wire

What is the unit of measurement of electrical pressure?

• kilowatt

• ohm

• resistance

• volt

How many watts will be used in 10 hours if an electric motor requires 7.5 amperes of electricity and is on a 120-volt electrical circuit?

• 9

• 10

• 2,000

• 9,000

What is a device used to protect circuits from an overload of current?

• fuse

• hot wire

• insulator

• neutral wire