Power Engineering 3A2 - Chapter 7 Exam Questions and Answers Solved Correctly
e. 1,2,3,4 - Answers Resistance:
1. Limits current flow
2. Depends on material
3. Depends on temperature
4. Depends on dimensions
a. 1,2,4
b. 1,2,3
c. 1,2,4
d. 2,3,4
e. 1,2,3,4
d. 1,4 - Answers 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 - Answers 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 - Answers 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 - Answers 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 - Answers The practical unit used to represent load is:
a. Watt
b. Amp
, c. Ohm
d. Microohms
e. Henry
c. in motion - Answers 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 - Answers 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 - Answers Factors determining the resistance of a
conductor are:
a. weight, length, diameter, and temperature
b. type of material, length, diameter, and temperature
c. weight, type of material, length and diameter
d. weight, type of material, length, diameter and temperature
e. weight, length, temperature and diameter
b. type of material, length, diameter, and temperature - Answers A conductor's resistance to current
flow is dependent on the following factors:
a. weight, length, diameter and temperature
b. type of material, length, diameter, and temperature
e. 1,2,3,4 - Answers Resistance:
1. Limits current flow
2. Depends on material
3. Depends on temperature
4. Depends on dimensions
a. 1,2,4
b. 1,2,3
c. 1,2,4
d. 2,3,4
e. 1,2,3,4
d. 1,4 - Answers 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 - Answers 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 - Answers 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 - Answers 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 - Answers The practical unit used to represent load is:
a. Watt
b. Amp
, c. Ohm
d. Microohms
e. Henry
c. in motion - Answers 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 - Answers 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 - Answers Factors determining the resistance of a
conductor are:
a. weight, length, diameter, and temperature
b. type of material, length, diameter, and temperature
c. weight, type of material, length and diameter
d. weight, type of material, length, diameter and temperature
e. weight, length, temperature and diameter
b. type of material, length, diameter, and temperature - Answers A conductor's resistance to current
flow is dependent on the following factors:
a. weight, length, diameter and temperature
b. type of material, length, diameter, and temperature
