5357 003

What is 3/8 converted to a decimal?

• 0.375

• 2.67

• 0.725

• 0.4

13m of a 50m drum of cable is used. What is the percentage left on the drum?

• 26%

• 50%

• 74%

• 13%

Make resistivity the subject of the formula
R = ρL/A

• ρ = RA/L

• R = AL/ρ

• R = ρL/A

• ρ = L/RA

Rearrange the following formula to make ‘c’ the subject:

a2 = b2 + c2

• c = √a2 – b2

• c = √b2 – a2

• c = √a2 + b2

• c = √b2 + a2

How can 25kV be expressed in a different way?

• 25 ×10⁶ V

• 25 ×10³ V

• 25 ×10¯³ V

• 25 ×10¯⁶ V

23mA can also be shown as how?

• 23 ×10⁶ A

• 23 ×10³ A

• 23 ×10¯³ A

• 23 ×10¯⁶ A

What is the missing side of the triangle shown below?

• 7.5

• 9.3

• 6.9

• 9.5

What formula will give the value of the hypotenuse of the triangle below?

• h = 5.2/cos36

• h = 5.2 x cos36

• h = 5.2/sin36

• h = 5.2 x sin36

Four different meters are used to measure the resistance of a CPC. What is the average reading if, individually they were: 1.3Ω, 1.05Ω, 1.24Ω, 1.12Ω

• 1.18Ω

• 1.2Ω

• 4.71Ω

• 1.51Ω

An ohmmeter takes five readings on a circuit: 0.24Ω, 0.79Ω, 0.26Ω, 0.35Ω, 0.56Ω. What is the ‘range’ of the readings?

• 0.55Ω

• 0.79Ω

• 0.24Ω

• 2.16Ω