Electrical Principles Short A2

From a bundle of 3m length conduit with 50 lengths you have used 16 lengths for an installation.

What percentage of conduit has been used?

• 8%

• 16%

• 40%

• 32%

An Ammeter is used to record the following values:

60A, 88A, 45A, 10A, 13A and 100A. What is the mean of

these values?

• 316A

• 52.6A

• 45A

• 59.7A

The Si unit for capacitance is what?

• Farads

• Ohms

• Henrys

• Amperes

The unit of measure for EMF is what?

• Amperes

• Volts

• Ohms

• Farads

What is the indices required to represent  $m^2$  when  $mm^2$  has been used? 

•  $\times10^{-3}$  

•  $\times10^{-9}$  

•  $\times10^{-6}$  

•  $\times10^{-12}$  

Which instrument would be used to measure the current in an electrical circuit?

• Ohm Meter

• Watt Meter

• Voltage Meter

• Ammeter

A load generates a force of 800 Newton’s. Calculate the mass of the load

• 81.55 kg

• 7848 kg

• 1131.54 kg

• 98.69 kg

Tags

NGSS.HS-PS2-1

An electric motor in a car production plant uses 600,000 Joules of energy in 2 ½ minutes. What is the power rating of the motor?

• 2 kW

• 3 kW

• 4 kW

• 5 kW

Tags

NGSS.HS-PS3-3

An electric motor has a 6.2 kW input and has a really poor efficiency of 59%. What is the motor’s output?

• 4.789 kW

• 5.743 kW

• 3.658 kW

• 2.952 kW

Tags

NGSS.HS-PS3-1

A three pulley system is required to lift a load force of  $80\times10^3$  Newton’s. 

What is the effort force required to lift this load?     

• 26.7 kN

• 26.7 N

• 2.67 kN

• 2.67 N

Tags

NGSS.HS-PS2-1