Ag Mech I- 4.06: Electrical Principles

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 electric circuit?

• 9

• 10

• 2000

• 9000

What is the unit of measurement of electrical pressure?

• kilowatt

• ohm

• resistance

• volt

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? (Formula: $A=W\div V$ ) 

• 5.00
  

• 5.33

• 6.67

• 8.00

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

• fuse

• hot wire

• isulator

• neutral wire

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 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

What is the watt rating of a portable electric bill with 30 amps and 120 volts?  $W=V\times A$  

• 40

• 600

• 1000

• 3600

A current-carrying conductor under electrical pressure in a/an:

• fuse

• hot wire

• isulator

• neutral wire

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

An agricultural mechanics shop has five 200-watt lights, a 600-watt saw, and a 100-watt fan that were used for 5 hours. How many kilowatts of electricity were used?

• 0.85

• 8.5

• 125.5

• 700