ELECTRICAL AND INSTRUMENTATION EXAM QUESTIONS WITH ANSWERS UPDATED GRADED A+ .

ELECTRICAL AND INSTRUMENTATION
EXAM QUESTIONS WITH ANSWERS
UPDATED \ GRADED A+ .


a - correct Answers -The total equivalent resistance of three resistances in a series circuit can be
given as:
Choose one answer.
a. R1 + R2 + R3
b. (1/R1) + (1/R2) + (1/R3 )
c. (R1/1) + (R2/2) + (R3/3)
d. R1 x R2 x R3
e. (R1 + R2 + R3) / 3


e - correct Answers -The voltage required to force a current of 15 A through a resistance of 5 Ω
will be _____ V.
Choose one answer.
a. 0.33
b. 3
c. 7.5
d. 33
e. 75


e - correct Answers -When 1 ampere of current flows through a resistance by the application of 1
volt the resistance will be 1:
Choose one answer.
a. Watt
b. Joule

1

,c. Kilowatt
d. Ampere
e. Ohm


e - correct Answers -The voltage required to be supplied to a 12 kW motor drawing 24 A is:
Choose one answer.
a. 5 kV
b. 50 kV
c. 288 v
d. 2 kV
e. 500 V


d - correct Answers -_____ current flow is from positive to negative.
Choose one answer.
a. Alternating
b. Direct
c. Static
d. Conventional
e. Electron


e - correct Answers -The purpose of having an upward movement of a switch handle to close the
switch is:
Choose one answer.
a. To have the handle out of the way
b. To meet the requirements of the electrical codes
c. Because it is easier to operate when opening the switch
d. It indicates the condition of the circuit
e. To prevent the switch from closing due to gravity


2

,e - correct Answers -Atoms that have greater numbers of electrons in the outer shell are:
Choose one answer.
a. Positively charged
b. Good conductors
c. Poorinsulators
d. Neutrally charged
e. Poor conductors


c - correct Answers -The EMF of an electrical circuit may be provided by:
Choose one answer.
a. The load
b. The circuit resistance
c. A battery
d. The current
e. The conductors


a - correct Answers -The opposition, a device or material offers to the flow of electric current, is
known as:
Choose one answer.
a. resistance
b. conductance
c. voltage drop
d. insulation
e. counter EMF


a - correct Answers -Electrical power can be determined by the formula:
Choose one answer.
a. P = E x I
b. I = E x R
3

, c. E = I x R
d. R = E x I
e. P = I x R


c - correct Answers -The voltage drop across a 20 Ω resistor with 10 A flowing would be _____
V.
Choose one answer.
a. 2
b. 0.5
c. 200
d. 20
e. 150


b - correct Answers -The equivalent resistance of three resistances of 10, 25 and 50 Ω connected
in parallel is _____ Ω.
Choose one answer.
a. 0.16
b. 6.25
c. 85
d. 18.75
e. 8.5


c - correct Answers -The unit for opposition to current flow is the:
Choose one answer.
a. Volt
b. Ampere
c. Ohm
d. Watt
e. Newton

4