1. A resistor is an electrical component that limits or regulates the flow of electrical current in an electronic circuit. Below is a diagram of a series of resistors (R1, R2, and R3) on a circuit. R represents the total value of all the resistors on a circuit.



    If R = R1 + R2 + R3, which of the following formulae is used to calculate the value of R3 ?
    • R3 = R – R1 – R2
    • R3 =(R1+R2) ÷ R
    • R3 = R + R1 – R2
    • R3 = R + R1 + R2

  2. 3 pot lights are to be installed in a ceiling so that their centres are an equal distance apart. If the ceiling measures 22 feet, 3 inches, how far apart are the centres of the pot lights?
    • 8 feet, 5 inches
    • 11 feet, 1 inch
    • 7 feet, 5 inches
    • 7 feet, 3 inches


  3. Computer diskettes store computer data. This data can be measured in bytes, kilobytes (KB) or megabytes (MB). The chart below shows the relationship between bytes, kilobytes and megabytes.

    1 KB = 1,000 bytes
    1 MB = 1,000,000
    1 MB = 1,000 KB

    A computer diskette holds 1.44 MB. What is the equivalent in KB?

    • 14,400 KB
    • 140 KB
    • 1,400 KB
    • 14 KB

  1. In the equation 4(c – b) = c + d, a = 3, b = -8 and c = 12. What is the value of d?
    • 13
    • 40
    • 77
    • 44

Questions 39 – 40 refer to the right angle triangle shown in Figure 3

right angle triangle

 

  1. In the triangle shown, if the
    length of side a is 8 feet, and the
    length of side b is 6 feet, what is
    the length of side c?
    • √12 feet
    • 12 feet
    • √10 feet
    • 10 feet