POWER ENGINEERING 3A2 EXAM 2026
COMPREHENSIVE STUDY GUIDE
COMPLETE QUESTIONS AND ANSWERS
⫸ d. 1,4 Answer: Conductive materials:
1. Gain resistance while temperature rises while others lose resistance
2. Have no resistance change with temperature change
3. Always have resistance changing directly with temperature
4. Can vary resistance directly or inversely with temperature
a. 1,3,4
b. 2,3
c. 2,4
d. 1,4
e. 1,2,3,4
⫸ b. negative to positive Answer: Free valence electrons flow from
____ when connected to electrical supply
a. positive to negative
b. negative to positive
c. positive to proton
d. negative to proton
e. positive to neutron
,⫸ c. The positive pole Answer: The free valence electrons of a
conductor, when connected to the poles of a battery will move towards:
a. both poles at the same time
b. the negative pole
c. the positive pole
d. either or both poles, quite randomly
e. the cathode
⫸ c. 1, 4 Answer: An electrical source could be in the form of a:
1. Battery
2. Magnet
3. Flux
4. Generator
a. 1, 2, 4
b. 2, 3
c. 1, 4
d. 2, 3, 4
e. 1, 2, 3, 4
⫸ c. Ohm Answer: The practical unit used to represent load is:
, a. Watt
b. Amp
c. Ohm
d. Microohms
e. Henry
⫸ c. in motion Answer: Electric current flow depends on the number of
charges:
a. between two points
b. per second
c. in motion
d. as a potential
e. per mechanical power output
⫸ a. between two points Answer: The power source must maintain a
potential difference:
a. between two points
b. across the emf
c. across the short circuit
d. within the load
e. between the prime mover and generator
⫸ b. type of material, length, diameter, and temperature Answer:
Factors determining the resistance of a conductor are:
COMPREHENSIVE STUDY GUIDE
COMPLETE QUESTIONS AND ANSWERS
⫸ d. 1,4 Answer: Conductive materials:
1. Gain resistance while temperature rises while others lose resistance
2. Have no resistance change with temperature change
3. Always have resistance changing directly with temperature
4. Can vary resistance directly or inversely with temperature
a. 1,3,4
b. 2,3
c. 2,4
d. 1,4
e. 1,2,3,4
⫸ b. negative to positive Answer: Free valence electrons flow from
____ when connected to electrical supply
a. positive to negative
b. negative to positive
c. positive to proton
d. negative to proton
e. positive to neutron
,⫸ c. The positive pole Answer: The free valence electrons of a
conductor, when connected to the poles of a battery will move towards:
a. both poles at the same time
b. the negative pole
c. the positive pole
d. either or both poles, quite randomly
e. the cathode
⫸ c. 1, 4 Answer: An electrical source could be in the form of a:
1. Battery
2. Magnet
3. Flux
4. Generator
a. 1, 2, 4
b. 2, 3
c. 1, 4
d. 2, 3, 4
e. 1, 2, 3, 4
⫸ c. Ohm Answer: The practical unit used to represent load is:
, a. Watt
b. Amp
c. Ohm
d. Microohms
e. Henry
⫸ c. in motion Answer: Electric current flow depends on the number of
charges:
a. between two points
b. per second
c. in motion
d. as a potential
e. per mechanical power output
⫸ a. between two points Answer: The power source must maintain a
potential difference:
a. between two points
b. across the emf
c. across the short circuit
d. within the load
e. between the prime mover and generator
⫸ b. type of material, length, diameter, and temperature Answer:
Factors determining the resistance of a conductor are:
