Free Printable UNIT PART b

1.

1- Before operating any equipment, the pre-start inspection you must perform is;

a)

a. Visual inspection.

b)

b. Automatic inspection.

c)

c. Hearing inspection.

d)

d. Touching inspection.

2.

1- …………… is a very important document where you will find the information you need to use and maintain items of equipment in the field

a)

a. Pocket book.

b)

b. Vendor manual.

c)

c. index.

d)

d. Calendar.

3.

1- …………….is a guide to what information you need, to show you what parts the manual has and what subjects those parts covers;

a)

a. Pocket book.

b)

b. Index.

c)

c. Manufacture’s manual.

d)

d. Calendar

4.

1- An index is also called;

a)

a. Content list.

b)

b. Pocket book.

c)

c. Calendar.

d)

d.Record book

5.

1- Components that have contacts, i.e. relays and switches, have their contacts drawn in;

a)

a. Normal state.

b)

b. Abnormal state.

c)

c. Short circuit state.

d)

d. Fault to earth state.

6.

1- The parts of the manual may be called;

a)

a. Sections.

b)

b. Parts.

c)

c. Chapters.

d)

d. All of the above.

7.

1- The diagram in the figure below is;

a)

a. Schematic diagram.

b)

b. Pictorial diagram.

c)

c. Wiring diagram.

d)

d. Layout diagram.

8.

1-

Refer to the figure below, when you press PB-2, CR1 will be ……………, CR1-1B will ……………. and CR1 will ………….. when PB2 is released;

a)

a. Energized, opened, remain energized.

b)

b. Energized, closed, de- energized.

c)

c. Energized, closed, remain energized.

d)

d. De-energized, closed, become energized.

9.

1-

Refer to the figure below, the component connected toTB1-16 and TB1-17 is a;

a)

a. Control relay.

b)

b. Solenoid valve.

c)

c. Time relay.

d)

d. Resistance.

10.

1-

Refer to the figure below, the DC return (- negative terminal) is provided to SOV coil through TB2-2 to TB1-7 and….............. ;

a)

a. TB1-16

b)

a. TB1-17

c)

b. TB1-10

d)

c. TB1-9

11.

1- The holding contact is connected to terminals;

a)

A. TB2-7 and TB2-9

b)

B. TB2-3 and TB2-4

c)

C. TB2-4 and TB2-5

d)

D. TB2-7 and TB2-8

12.

What is this symbol?

a)

A. A bank of resistors

b)

B. A dc supply

c)

C. A transformer

d)

D. A rectifier

13.

1- Which is the symbol for voltmeter?

B.

C.

D.

a)

b)

c)

d)

14.

Which is the symbol for a single cell?

a)

b)

c)

d)

15.

Which is the symbol for diode?

a)

b)

c)

16.

Which is the symbol for variable resistor?

a)

b)

c)

17.

What does this symbol represent?

a)

A. Variable switch

b)

B. Variable Resistor

c)

C. Relay

d)

D. Indicator lamb

18.

Which is the symbol for a solar cell or photocell?

a)

b)

c)

d)

19.

17- What type of switch is this?

a)

a.Single-pole, double-throw

b)

b. Single-pole, single-throw

c)

c. Double-pole, double-throw

d)

d. Double-pole, single-throw

20.

17- What type of switch is this?

a)

a. Single-pole, double-throw

b)

b. Single-pole, single-throw

c)

c. Double-pole, double-throw

d)

d. Double-pole, single-throw

21.

17- What type of switch is this?

a)

a. Single-pole, double-throw

b)

b. Single-pole, single-throw

c)

c. Double-pole, double-throw

d)

d. Double-pole, single-throw

22.

In the figure below, answer the following questions

a. The symbol of # 10 is

b. The symbol of # 2

c. The symbol of # 4

a)

Voltmeter, fuse,lamp

b)

Ammeter,buzzer,switch

c)

resistor, push bottom,potentiometer

23.

In the figure below, answer the following questions

The symbol of # 8 is

The symbol of # 6 is

The symbol of # 3 is

a)

Fuse, voltmeter ,lamp

b)

fixed resistor ,PB,Rheostat

c)

Ammeter , BUZZER, Switch

24.

In the figure below, answer the following questions

The symbol of # 5 is

The symbol of # 7 is

The symbol of # 9 is

a)

Lamp switch ,ammeter

b)

fixed resistor,push button, Potentiometer/ rheostat

c)

voltmeter ,switch, fixed resistor

25.

In the figure below, answer the following questions

TB2 is mounted on

a)

Bread board

b)

mounting plate

c)

TB1

26.

Relay Base located in

a)

Bread board

b)

mounting plate

c)

TB2

d)

NOT EXIST

27.

a. 24v DC supply located in

a)

bread board

b)

TB1

c)

NOT EXIST

d)

Mounting Plate

28.

a. 24v DC supply connected between

a)

a. TB1-5 and TB1-6

b)

TB1-13 and TB1-14

c)

TB2-1 and TB2-2

29.

a. The holding contact connected between

a)

TB2-1 and TB2-2

b)

TB1-13 and TB1-14

c)

TB1-5 and TB1-6

30.

Control relay connected between

a)

TB1-5 and TB1-6

b)

TB1-13 and TB1-14

c)

TB2-1 and TB2-2

31.

What happens when PB is pressed and held down?

a)

a.CR1 denergizes, L2 OFF, L1 OFF, L3 ON

b)

b. CR1 energizes, L2 OFF, L1 OFF, L3 OFF

c)

c. CR1 energizes, L1 ON, L2 ON , L3 OFF

d)

d. CR1 energizes, L2 OFF, L1 OFF, L3 ON

32.

What happens when PB is pressed and then released (in open position)?

a)

a. CR1 de-energizes, L3 OFF, L1 ON, L2 OFF

b)

b. CR1 energizes, L2 OFF, L1 OFF, L3 OFF

c)

c. CR1 de-energizes, L2 OFF, L1 OFF, L3 OFF

d)

d. CR1 de-energizes, L2 OFF, L1 OFF, L3 ON

33.

What is a kind a map important for an electricians to follow signal paths, locate components, isolate circuits and know what voltage levels to expect at different points in the circuit?

a)

a. Circuit diagram

b)

b. Schematic diagram

c)

c. Pictorial diagram

d)

d. Wiring diagram

34.

It is a diagram that consists of symbols connected by a conductor lines. The symbols represent the power source and the different components in the circuit.

a)

a. Circuit diagram

b)

b. Schematic diagram

c)

c. Pictorial diagram

d)

d. Wiring diagram

35.

21. What diagram shows the layout or physical arrangement of the devices in a circuit and where each wire is connected, also referred to as termination, or connection diagrams?

a)

a. Circuit diagram

b)

b. Schematic diagram

c)

c. Pictorial diagram

d)

d.Wiring diagram

36.

What diagram represent a circuit path and component, they provide a clear view of the wiring and component used to make-up the circuit?

a)

a. Circuit diagram

b)

b. Schematic diagram

c)

c. Pictorial diagram

d)

d. Wiring diagram

37.

in a connection diagram, all connection diagram are shown in TB, relays, solenoid, transformers and other devices. What TB stands for?

a)

a. Timer block

b)

b. Term block

c)

c. Terminal block

d)

d. Termination block

38.

The three types of basic electrical circuits are;

a)

a. Closed, opened, overloaded.

b)

b. Short circuited, opened, switched.

c)

c. Closed, opened, switched.

d)

d. Closed, short circuited, switched.

39.

Current can only flow in a closed loop or path, these loops are called;

a)

a. Circuits.

b)

b. Circles.

c)

c. Triangles.

d)

d. Lines

40.

When checking the circuit with an ohmmeter, an open circuit shows;

a)

a. A low resistance.

b)

b. A very high resistance.

c)

c. Zero resistance.

d)

d. 100 ohm

41.

The open part of the circuit is easy to find, you can see;

a)

a. Burnt parts.

b)

b. Broken parts.

c)

c. Loosen connections.

d)

d. Any of the above.

42.

Identify the component symbol in the figure shown

a)

a. Single pole double throw switch

b)

b. Double pole double throw switch

c)

c. Double pole single throw switch

d)

d. Single pole single throw switch

43.

In an open circuit shown below, when the voltmeter leads are placed across the break, the voltage reading will be;

a)

a. Applied voltage.

b)

b. More than the applied voltage.

c)

c. Less than the applied voltage.

d)

Half of the applied voltage

44.

The switch shown below is;

a)

a. A pushbutton switch.

b)

b. A thermal switch.

c)

c. A rotary switch

d)

A magnetic switch

45.

The switch shown below is;

a)

a. A slide switches (S.P.D.T).

b)

b. A pushbutton switch.

c)

c. A thermal switch.

d)

A rotary switch

46.

- In a……………. circuit, components are connected end to end;

a)

a. Parallel.

b)

b. Compound.

c)

c. Series.

d)

d. Open.

47.

In a……………….circuit, components are connected across the supply;

a)

a. Parallel.

b)

b. Compound.

c)

c. Series.

d)

Open

48.

The condition of the circuit shown is;

a)

a. Current flows normally.

b)

b. Short circuited.

c)

c. No current flow.

d)

d. Current will be very high.

49.

At correct applied voltage, if L2 burns out, the brightness of lamp L1 in the circuit will;

a)

a. Remain at its normal brightness.

b)

b. Decrease.

c)

c. Increase.

d)

d. Be at twice of its normal brightness.

50.

As more loads are added to a series circuit, the voltage drop across each load will;

a)

a. The same.

b)

b. Increase.

c)

c. Decrease.

d)

50% of the applied v

51.

Refer to the figure below, when more resistance are added in a series circuit, the circuit current will;

a)

a. Decrease.

b)

b. Increase.

c)

c. Be the same.

d)

Be double.

52.

Refer to the figure below, when more load are added in a parallel circuit, the applied voltage will;

a)

a.Decrease.

b)

b. Increase.

c)

c. Be the same.

d)

d. Be double.

53.

The current in the coil will be equal to;

a)

a. The difference between I_AandI_B.

b)

b. The current I_A.

c)

c. The sum of I_A and I_B.

d)

d. The current I_B.

54.

The equation for determining power in a circuit is;

a)

a. P = V x I.

b)

b. P =I² x R

c)

c. P = V ² / R

d)

d. All of the above

55.

In the figure below, the total current will ………. and total resistance will ………….. if L2 becomes open;

a)

a. Increase, decrease.

b)

b. Decrease, decrease.

c)

c. Increase, increase.

d)

d.Decrease, increase

56.

The correct equation for Ohm’s law is;

a)

a. E = I X R

b)

b. I = E x R

c)

c. E = I/R

d)

d. R = V x I

57.

The total current drawn by the circuit below if each lamp has 2 ohms resistance is;

a)

a.96 A.

b)

b. 12 A.

c)

c. 1.5 A.

d)

d. 0.66 A.

58.

If the resistance of each lamp is 4 Ω with an applied voltage of 24 volts, the voltage drop across load B will be;

a)

a. 8v.

b)

b. 2v.

c)

c. 16v.

d)

d.24v

59.

If each lamps has 4 Ω resistance, the total resistance of the circuit is;

a)

a. 20 Ω.

b)

b. 8 Ω

c)

c. 2.6 Ω.

d)

d. 10.66 Ω.

60.

a circuit resistance is 100Ω with a 10 ampere current flow, the circuit's power will be;

a)

a. 1Kw.

b)

b. 10 Kw

c)

c. 100 Kw.

d)

d. 0.1Kw

61.

15-

Find R in a circuit with 10 V applied and 10 mA through the below circuit; page 25

a)

a. 1 KΩ.

b)

b. 10 KΩ.

c)

c. 100 Ω.

d)

d. 10 Ω.

62.

With V= 3 KV and R= 10 KΩ,The current is;

a)

a. 0. 3 A

b)

b. 0.03A

c)

c. 3A

d)

d. 3.3A

63.

Referring to the figure below, If P = 10 watts and V = 100 volts, current equals;

a)

a. 0.1mA.

b)

b.100 mA.

c)

c. 10 mA.

d)

d.1mA

64.

A carbon type resistor have a negative temperature coefficient, which means when it gets hot the resistance;

a)

a. Decreases.

b)

b. Increases.

c)

c. Remains the same.

d)

d. Decreases to 50%.

65.

A resistor with color band of Blue, Gray, Black, and Silver has a resistance value of;

a)

a. 86 10% ohms.

b)

b. 68 5% ohms.

c)

c. 86 5% ohms.

d)

68 10% ohms

66.

The minimum and maximum range values of a Brown, Black, Orange and Gold resistor are;

a)

a. 5,900 to 6,900 Ω

b)

b. 950 to 1050 Ω

c)

c. 9,500 to 10,500 Ω

d)

d. 95,000 to 105,000 Ω

67.

The minimum and maximum range values of a Yellow, Blue, Orange and silver resistor are;

a)

a. 38,700 Ω to 47,300 Ω

b)

b. 40,850 Ω to 45,150 Ω

c)

c. 41,400 Ω to 50,600 Ω

d)

d. 43,700 Ω to 48,300 Ω

68.

………… is a type of resistor with a movable arm to change the value of its resistance;

a)

a. A variable resistor.

b)

b. A carbon resistor.

c)

c. A thermistor resistor.

d)

d. A fixed resistor.

69.

A 4.7 MΩ ± 5% resistor will have a color band of;

a)

a. Violet, Yellow, green, gold.

b)

b. Yellow, violet, green, gold.

c)

c. Yellow, violet, blue, gold.

d)

d. Yellow, violet, green, silver.

70.

The value of the resistor in the figure below is;

a)

a. 46,000ohms

b)

b. 460 ohms

c)

c. 4,600 ohms

d)

d. 6400 ohms

71.

The value of the resistor in the figure below is;

a)

a. 7,000,001 ohms

b)

b. 750 ohms

c)

c. 751 ohms

d)

d. 7.50 ohms

72.

The tolerance of a carbon resistor color coded black-grey-black-gold is

a)

a. 20%

b)

b. 5%

c)

c. 10%

d)

d. 2%

73.

A resistor’s wattage rating refers to;

a)

a. The amount of heat it can safely dissipate.

b)

b. Its value above 1,000 ohms

.

c)

c. The accuracy of its color coding

d)

d. The voltage it can safely be connected to

74.

The component in the figure shown is;

a)

a. Rotary switch

b)

b. fixed resistor

c)

c. 3 pole switch

d)

d. Trimpot ( potentiometer )

75.

Referring to figure (1) , the smallest resistor wattage is;

a)

a. ½ watt

b)

b. 1 watt

c)

c. 1/8watt

d)

¼ watt

76.

Referring to figure (1) , the biggest resistor wattage is;

a)

a. ½ watt

b)

b. 1watt

c)

c. 1/8 watt

d)

d. 2 watt

77.

Referring to figure (1) , the second resistor wattage is;

a)

a. ½ watt

b)

b. 1 watt

c)

c. 1/8 watt

d)

¼ watt

78.

Referring to figure (1) , the third resistor wattage is;

a)

a. ½ watt

b)

b. 1watt

c)

c. 1/8 watt

d)

d. ¼ watt

79.

The wattage rating is identified by any of the color bands

a)

True

b)

False

80.

When a resistor’s physical size increases, its wattage rating;

a)

a. Increases

b)

b. Decreases

c)

c. Remains constant

d)

d. Increases to 200%

81.

A resistor’s size is an indication of;

a)

a. The number of volts it can hold.

b)

b. The number of colors on its body.

c)

c. The number of watts it can get rid of, or dissipate.

d)

d. The value of tolerance which it has.

82.

The amount of heat depends on

a)

a. The amount of current and the resistance.

b)

b. The number of bands.

c)

c. The amount of current and frequency.

d)

d. The amount of frequency and voltage.

83.

If the voltage across R1= 40V, R4= 20V, R5= 60V and R6= 100V, the voltage across R2 when total voltage 220V is;

a)

a. 220 v

b)

b. 60 v

c)

c. 20 v

d)

d. 40 v

84.

If voltage across R1 is 12V, R6 is 2.5V, R5 is 20.5V, and total voltage is 40V, what is the voltage across R4?

a)

a. 5 v

b)

b. 2 v

c)

c. 1.5 v

d)

d. 8 v

85.

A circuit has two identical lamps connected in series, so the voltage drop across each lamp is;

a)

a. Equal to the applied voltage

b)

b. Half of the applied voltage

c)

c. Less than the applied voltage

d)

d.Quarter of the applied voltage

86.

A circuit has four identical resistor connected in series, so the voltage drop across each resistor is;

a)

a. Quarter of the applied voltage

b)

b. Equals to the applied voltage

c)

b. Half of the applied voltage

d)

d. Less than the applied voltage

87.

What is the building blocks of large electrical systems?

a)

a. Wire

b)

b. Tubes

c)

c. Circuits

d)

d. Components

88.

. How does the electron flow?

a)

a. From positive to negative to positive

b)

b. From positive to negative

c)

c. From negative to positive

d)

d. In any direction

89.

Which of the following circuits will not have current flow?

a)

a. Closed circuit

b)

b. Open circuit

c)

c. Circuit with only one path

d)

d. Circuit with more than one path

90.

A closed circuit will contain a minimum of

a)

a. Power source, control device and load

b)

b. Power source and load

c)

c. Power source, conductors and load

d)

d. Conductors, control device and load

91.

How are parts connected in a series circuit?

a. Across one another

a)

b. Across the power source

b)

c. End to end

c)

d. In line with the voltmeter

92.

If one lamp in a parallel circuits burns out, what happened to the other lamp?

a)

a. Continue to burn

b)

b. Go out also

c)

c. Burn brighter

d)

d. Become very dim

93.

What is the tolerance of a resistor having no fourth color band?

a)

a. ± 5%

b)

b. ± 10%

c)

c. ± 15%

d)

d. ± 20%

94.

What does the physical size of a carbon type resistor determine?

a)

a. Its ability to limit current

b)

b. Its ability to dissipate heat(power rating)

c)

c. Its ability to limit voltage

d)

d. Its ability to change resistance

95.

When excessive current flows through a circuit, the resistors in the circuit will?

a)

a. Burn out

b)

b. Dissipate less heat

c)

c. Present more opposition to current

d)

d. Have more power handling ability to reduce high current

96.

What is the main advantage of a wire wound resistor over a carbon resistor?

a)

a. Higher current

b)

b. Higher wattage

c)

c. Higher resistance

d)

d. Higher voltage

UNIT PART b

Total questions: 96

Worksheet time: 48mins

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