Electric basic principle - Dgca question bank for pilots

Results

#1. All effects of electricity take place because of the existence of a tiny particle called the:

electric.

proton.

neutron.

electron.

#2. The nucleus of an atom is:

positively charged.

negatively charged.

statically charged.

of zero potential.

#3. An atom is electrically balanced when:

its protons and electrons balance each other.

the protons outnumber the electrons.

the electrons outnumber the protons.

the electric and static charges are balanced.

#4. The electrons of an atom are:

positively charged.

neutral.

negatively charged.

of zero potential.

#5. A material with a deficiency of electrons becomes:

positively charged.

negatively charged.

isolated.

overheated.

#6. A material with a surplus of electrons becomes:

positively charged.

negatively charged.

over charged.

saturated.

#7. Heat produces an electric charge when:

like poles are joined.

a hard and soft glass is heated.

the junction of two unlike metals is heated.

hard and soft material are rubbed together.

#8. Friction causes:

mobile electricity.

basic electricity.

static electricity.

wild electricity.

#9. Chemical action produces electricity in:

a light meter.

a generator.

a primary cell.

starter generator.

#10. A photo electric cell produces electricity when:

two metals are heated.

exposed to a light source.

a light source is removed.

exposed to the heat of the sun.

#11. The difference in electric potential is measured in:

KVAR’s

watts

amps

volts

#12. The units of electrical power is measured in:

watts

amperes

ohms

volts

#13. The unit measurement of electrical resistance is:

the volt

the watt

the ohm

the ampere

#14. An ammeter measures:

current

power dissipation

differences of electrical potential

heat energy

#15. Materials containing ‘free electrons’ are called:

insulators

resistors

collectors

conductors

#16. The unit used for measuring the E.M.F. of electricity is:

the ohm

the ampere

the volt

the watt

#17. The unit used for measuring:

current - is the volt.

resistance - is the ohm.

electric power is the capacitor.

E.M.F. - is the amp.

#18. Three resistors of 60 ohms each in parallel give a total resistance of:

180 ohms

40 ohms

30 ohms

20 ohms

#19. A voltmeter measures:

electro-motive force.

the heat loss in a series circuit.

the current flow in a circuit.

the resistance provided by the trimming devices.

#20. Watts =

resistance squared x amps

volts x ohms

ohms x amps

volts x amps

#21. The total resistance of a number of power consumer devices connected in series is:

the addition of the individual resistances.

the addition of the reciprocals of the individual resistance.

twice the reciprocal of the individual resistances.

the reciprocal of the total.

#22. The total resistance of a number of resistances connected in parallel is:

R = R1 + R2 + R3 + R4

1 = 1 + 1 + 1 + 1 RT R1 R2 R3 R4

1 = R1 + R2 + R3 + R4 RT

R = 1 + R2 + 1 + R4 T1 R 1 R 1

#23. Ohms Law states:

Current in amps = Resistance in ohms Electromotive force in volts

Resistance in ohms = Current in amps Electromotive force in volts

Current in amps = Electromotive force in volts Resistance in ohms

#24. A device consuming 80 watts at 8 amps would have a have a voltage supply of:

640 volts.

12 volts.

10volts.

8 volts.

#25. In a simple electrical circuit, if the resistors are in parallel, the total current consumed is equal to:

the sum of the currents taken by the resistors divided by the number of resistors.

the sum of the currents taken by the resistors

the average current taken by the resistors times the number of the resistors.

the sum of the reciprocals of the currents taken by the resistors

#26. The symbol for volts is:

E or W

V or E

I or V

R or W

#27. Electrical potential is measured in:

watts

bars

volts

ohms

#28. If a number of electrical consuming devices were connected in parallel the reciprocal of the total resistance would be:

the sum of the currents.

the sum of the reciprocals of the individual resistances.

the sum of their resistances.

volts divided by the sum of the resistances.

#29. The current flowing in an electrical circuit is measured in:

volts

ohms

inuctance

amps

#30. Electro-motive force is measured in:

amps x volts

watts

ohms

volts

#31. OHMS law is given by the formula

I = R V

V = R I

I = V R

R = V x I

#32. The current flowing in a circuit is

Directly proportional to resistance, indirectly proportional to voltage

Directly proportional to temperature, inversely proportional to resistance

Inversely proportional to resistance, directly proportional to voltage

Inversely proportional to applied voltage, directly proportional to temperature

#33. The unit of EMF is the

Ampere

Volt

Watt

Ohm

#34. Potential difference is measured in

Amps

Volts

Watts

Ohms

#35. The unit of current is the

Ampere

Volt

Watt

Ohm

#36. The unit of resistance is the

Ampere

Volt

Watt

Ohm

#37. Electrical power is measured in

Ampere

Volt

Watt

Ohm

#38. 1,250 ohms may also be expressed as

1250 K ohms

1.25 K ohms

1.25 M ohms

0.125 K ohms

#39. 1.5 M ohms may also be expressed as

15000 ohms

1500 ohms

150000 ohms

1500 K ohms

#40. The voltage applied to a simple resistor increases

Current will decrease but power consumed remains constant

Resistance and power decrease

Current flow will increase and power consumed will increase

Current flow increases and power consumed decreases

#41. What is the total resistance in this circuit

11.5 ohms

11,500 K ohms

11.5 K ohms

11.5 M ohms

#42. The total resistance of the circuit is

14 ohms

39.6 ohms

25.6 ohms

varies with the applied voltage

#43. The current flow indication on ammeter ‘A’ would be

2 amps

2 volts

2.5 amps

2.5 volts

#44. The total power consumed in the circuit will be

14 kilowatts

56 kilowatts

56 watts

14 watts

#45. The power consumed by R5 alone is

14 watts

28 watts

112 watts

28 kilowatts

#46. The indication on voltmeter V1 will be

2.3 volts

28 volts

9.2 volts

92 volts

#47. The indication on voltmeter V3 will be

28 volts

14 volts

14 amps

3.5 volts

#48. The indication on voltmeter V2 will be

28 volts

4.8 volts

9.6 volts

14 volts

#49. The current flowing through R2 is

0.04 amps

0.4 amps

4 amps

40 milliamps

#50. The current flowing through R3 is

0.04 amps

0.4 amps

4 amps

40 milliamps

#51. The current flowing through R4 is

120 milliamps

1.2 amps

19.2 amps

1.92 milliamps

#52. The power consumed by R2 alone is

1.92 kilowatts watts

1.92 watts

65.3 watts

65.3 kilowatts

#53. The power consumed by R3 alone is

1.92 kilowatts watts

1.92 watts

65.3 watts

65.3 kilowatts

#54. The power consumed by R4 alone is

5.76 kilowatts

5.76 volts

5.76 watts

3.33 watts

#55. The power consumed by R1 alone is

18.4 kilowatts

42.32 watts

18.4 watts

4.232 kilowatts

#56. 550 K ohms may also be expressed as

550000 M ohms

0.55 M ohms

55000 ohms

0.55 ohms

Finish