# Electric Traction MCQ Electrical Engineering

50 Questions 30 Mins

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

• 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.

• plastic
• metal

• 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
• Estrella Delta
• Ninguno de los anteriores

• 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
• condutor
• insulator

• TRUE
• FALSE

• 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
• condutor
• insulator

• +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​+J2​Z12Z22+...+Jn​Z12Z22...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

• conductors
• brittle
• insulators
• resistors

• copper
• wood
• silver
• salt water

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

• Protons
• Neutrons
• Electrons
• Protons and Neutrons

• a conductor
• an insulator

• True
• False

• wall outlet
• generator
• battery
• All of above

• True
• False

### 30. What object could a switch be compared to?

• a roller coaster
• a drawbridge
• a belt buckle

• 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

• True
• False
• All of above

• 1
• 2
• 3
• 4

• sit still
• build up
• jump

• circuit
• charge
• discharge
• components

• 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

• 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

• 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

• 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

### 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