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Electric Traction MCQ Electrical Engineering

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About Electric Traction

Following are some of the multiple choice questions on the Electric Traction with answers that will help the students in developing their knowledge.

Electric Traction MCQ

1. The types of energy that a load can change electrical energy into.

sound
heat or thermal
light
All of above

2. __________ is stored energy.

Potential
Kinetic
None of the above
All of the above

3. ____________ is the ability to cause change.

Energy
Force
Friction
Motion

4. Static electricity occurs because...

of thunder
of humid air
of neutral particles adding up
of a buildup of charges on an object.

5. Electricity does not flow well through insulators. A good example of an insulator is _________________.

plastic
metal

6. Electricity flows well through "conductors." A good example of a conductor is ___________________.

metal
wood

7. Que convertidor debo utilizar para alimentar un Torno con motor de 400 V y 50 Hz, si la red disponible es de 660 V y 60 Hz.

DC-AC
AC-DC
AC-AC
ninguno de los anteriores

8. Se requiere establecer en un accionamiento un sistema de freno eléctrico rápido, Seria:

Freno por Contracorriente
Freno mecánico de Disco
Freno por Corriente Continua
Ninguno de los anteriores

9. Si se desea arrancar un motor en forma eficiente con el 65% del voltaje nominal, que arranque será mas apropiado

Con Resistencia
Con Autotransformador
Estrella Delta
Ninguno de los anteriores

10. Cuando se arranca un motor con arranque Estrella-Deltael voltaje al arrancar respecto al voltaje nominal es:

50.7%
65.0%
57.7%
66.7

11. A que Regimen se relaciona la potencia Efectiva de un motor

Regimen Intermitente
Regimen de Corta duración
Regimen Continuo
Ninguna de las anteriores

12. A material through which heats or electricity flows easily.

electric current
radiation
condutor
insulator

13. A positive ion is an atom with more electrons than protons

TRUE
FALSE

14. It is a reserve of chemical energy that can be transformed into electrical energ

battery
utilizer
wire
All of above

15. Resistor

A flow of electricity through a conductor
a path through which electricity can flow
a device that can open or close a circuit
an object in an electrical circuit that resists the flow of energy

16. A material that slows or stops the flow of energy, such as thermal energy, electricity and sound.

electric current
radiation
condutor
insulator

17. Como son la cupla C y la velocidad V, cuanto un vehículo eléctrico esta usando freno regenerativo

+C y +V
-C y -V
-C y +V
-C y -V

18. Un extractor presenta una cupla resistente similar a la funcion matematica:

y=axy=\frac{a}{x}y=xa
y=x+by=x+by=x+b
y=x2+cy=x^2+cy=x2+c
Ninguna de las anterisores

19. Para calculo simplificado del tiempo de aceleración, si la cupla de aceleración es igual a: Cac=0.45(Car+Cmax⁡)−0.5Cn NcNnCac=0.45\left(Car+C\max\right)-0.5Cn\ \frac{Nc}{Nn}Cac=0.45(Car+Cmax)−0.5Cn NnNc corresponde a

Cupla resistente Constante
Cupla resistente Lineal
Cupla resistente Parabolica
Ninguna de las anteriores

20. Que motor es de tracción por excelencia

Motor síncrono
Motor shunt
Motor serie
Motor asíncrono

21. La ecuación del momento de inercia equivalente rotacional es:

J=m(vw)2J=m\left(\frac{v}{w}\right)^2J=m(wv)2
J=m(vw)2+Jm+J1Z12+J2Z12Z22+...+JnZ12Z22...Zn2J=m\left(\frac{v}{w}\right)^2+Jm+\frac{J1}{Z1^2}+\frac{J2}{Z1^2Z2^2}+...+\frac{Jn}{Z1^2Z2^2...Zn^2}J=m(wv)2+Jm+Z12J1+Z12Z22J2+...+Z12Z22...Zn2Jn
J=Jm+J1Z12+J2Z12Z22+...+JnZ12Z22...Zn2J=Jm+\frac{J1}{Z1^2}+\frac{J2}{Z1^2Z2^2}+...+\frac{Jn}{Z1^2Z2^2...Zn^2}J=Jm+Z12J1+Z12Z22J2+...+Z12Z22...Zn2Jn
Ninguna de las anteriores

22. The loss of an unbalanced electric charge is an

electric force
electric field
electric discharge
All of above

23. Metals such as copper, iron, gold, and silver are ...

conductors
brittle
insulators
resistors

24. Which of the following an insulator?

copper
wood
silver
salt water

25. What parts of an atom are in the nucleus?

Protons
Neutrons
Electrons
Protons and Neutrons

26. A metal spoon is an example of _____.

a conductor
an insulator

27. The purpose of the power source is to push electrons through the electric circuit.

True
False

28. Click any that are examples of power sources.

wall outlet
generator
battery
All of above

29. When a switch is closed, it will complete a circuit and allow electricity to flow.

True
False

30. What object could a switch be compared to?

a fan blade
a roller coaster
a drawbridge
a belt buckle

31. The purpose of a load is to change electrical energy to another type of energy that can be used by people.

True
False

32. If an object has a net charge of +2e this means it has

lost 2 electrons
gained 2 electrons
lost 2 protons
gained 2 protons

33. Glass, rubber, silk, and plastic are all examples of

Conductors
Insulator
Thermel conductivity
Materials

34. An object that is positively charged contains more protons than electrons.

True
False
I need more information
All of above

35. How many paths for the flow of electricity does a simple electric circuit have?

1
2
3
4

36. How would the movement of electrons in electric current be described?

sit still
build up
jump
steady flow

37. What is the path for the flow of electricity called?

circuit
charge
discharge
components

38. What other word means component?

path
part
power
pop

39. If a substance has an excess number of electrons on its surface, what type of charge does it have?

A negative charge
A positive charge
A neutral charge
A nuclear charge

40. Electric charges that are different _______ each other.

Attract
Repel

41. The rate of acceleration on sub-urban or urban services is restricted by the consideration of

Engine power
Track curves
Passenger Discomfort
Track size

42. Suri transmission is

Electrical pneumatic
Mechanical electrical
Hydro mechanical
Hydro pneumatic

43. The number of passenger coaches that can be attached to a diesel engine locomotive on broad gauge is usually restricted to

5
10
14
17

44. The steam engine provided on steam locomotives is

Single acting condensing type
Single acting non-condensing type
Double acting condensing type
Double acting non-condensing type

45. Watt-hours per tonne km is usually the specific energy consumption for suburban services.

15 - 20
50 - 75
120 - 150
160 - 200

46. Locomotives with monometer bogies have

Uneven distribution of tractive effect
Suitability for passenger as well as freight service
Lot of skidding
Low coefficient of adhesion

47. Locomotive having mono-motor bogies

Has better coefficient of adhesion
Are suited both for passenger as well as freight service
Has better riding qualities due to the reduction of lateral forces
Has all above qualities

48. Which of the following braking systems is used on steam locomotives?

Hydraulic system
Pneumatic system
Vacuum system
None of the above

49. In case of a steam engine an average coal consumption per km is nearly

150 to 175 kg
100 to 120 kg
60 to 80 kg
28 to 30 kg

50. Methods can bring the locomotive to dead stop.

Plugging braking
Rheostat braking
Regenerative braking
None of the above

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