ELECTRICIAN
MODEL PAPER - 1
PART A – MARKS: 70
I. Answer the following Questions
1. What is purpose of Fuse?
2. a heater is rated as 1000 w, 250 v. What is the heater resistance?
3. In simple voltaic cell, bubbles of hydrogen evolve s at copper plate resulting in
increase of internal resistance of the cell? What is the name of the effort?
4. According to Faraday’s laws, there are two types of e.m.f. can be induced in coils.
What are the types of e.m.f.?
5. The armature winding are mainly classified into two types. What are the two
types of armature winding?
6. In one type of battery changing, the changing level is at a very low rate of the
normal rate for a long period. Which results in the maintenance of the battery in
good condition? What is the name of the changing?
7. The capacity of the battery depends as four factors. What are the two factors
depend upon with the plate’s o the battery?
8. The relationship between power, voltage and current can be represented by a
divided triangle. Draw a power triangle for D.C. circuit?
9. in an atom, nuclesus has proton and neutron? What are the charges proton and
neutron having?
10. The electrical accessories and components are always represented by ISI
symbols in electric circuits. Draw the symbol for fuse?
11. When the current with high frequency is passed through vacuum tube some
effects will occur. What is the name of the effect?
12. in a circuit, when are ampere current is passed for one second, then it is called
as quantity electricity’. What is the unit of it?
13. in a lead acid battery, separators are used to avoid short between the positive
and negative plates?
14. A fully discharged cell will indicate 1.8v to 1.6v. Which equipment is needed to
measure that volt?
15.In Fleming’s Right hand rule, which one is indicated by the
Middle Finger?
Multiple choice Questions.
16. Which is the the principle of DC Generator?
(a). Fleming’s right hand rule
(b). Faraday’s laws of electrolysis
(c). Faraday’s laws of electromagnetic induction (d). Mutual induction
17. What is unit of reluctance?
(a). Ampere turns (b) Weber/sqm (c). Ampere turns/Weber (d) Unit less
quantity
18. Which one of the materials of the atom contains only 4 free electrons?
(a).copper (b) Gold (c) Germanium (d) Mica
19. Commercial unit of electrical energy is
(a) Joule (b). Watt-hour (c)kilowatt-hour (d) watt-second
20. What is the name of instrument used to measure the voltage of a cell/battery?
(a) Hydrometer (voltmeter (c) Multimeter (d) High rate discharge tester
21. in which material, permanent magnet is made?
(A). Soft iron piece (b).Alnico (c). Nicrhrome (d.) graphite
22. in which material, the burses are made?
(a). Bronze (b). Gun metal (c). Carbon and graphite (d) zinc carbide
23. Which type of DC generator is used for battery changing purpose?
(a). Series generator (b) shunt generator (c) Long shunt compound generator
(d) Short shunt compound generator
24. Which rule is used to determine the direction of the magnet field?
(a). Helix rule (b). End rule (c) Right hand grip rule (d) Fleming’s right hand rule
25. In a lead acid battery there are 6 positive plates. How much number of negative
plates is in the same battery?
(a) 4 (b) 5 (c) 7 (d) 8
ELECTRICIAN
MODEL PAPER - 2
PART A – MARKS: 70
SHORT ANSWER QUESTIONS
1. Short and open circuit are two possible defects that can occur in an electrical circuit?
What is the function of when there is a short in a circuit?
2 .In re-wearable fuse, tin and copper alloy material is used as fuse element?
What material is used as fuse element in HRC fuse?
3. Quantity of electricity is defined as the product of current and time, what is unit of it?
4. When a battery is kept long time in discharged condition, its plates color is charged into whitish
color?
5. The statically induced EMF has a polarity which opposes the voltage that created it?
6. Which are the best materials for fuse wire?
7. What is called Brazing? 8. What is meant by
Magnet?
9. If a coil has N turns and current I and flux ø then what will be the inductance?
10. What is known by an Anode and Cathode? 11. What is EMF of a lead acid cell? 12. For Generator
what is the e.m.f. equation?
MULTIPLE CHOICE QUESTION
13. Which of the following materials is a paramagnetic substance?
(a) Iron
(b) Glass
(c) Aluminum
[ ]
(d) Nickel
[ ]
14.By which material the yoke is made up of small D.C. machine?
(a) mild steel
(b) high speed steel (c) cast iron
(d) wrought iron
15.What is the EMF value of the nickel iron cell, when it is fully charged fully discharged condition? [ ]
(a) 1.2v to 1.0v
(b) 1.4v to 1.15v (c) 1.4v to 1.25v
16.Which type of primary cell cannot be used in digital watches?
(a) Mercury cell
(b) lithium cell
17. What is the unit of heat?
(d) 1.5v to 1.3v
[ ]
(c) dry cell
(d) silver oxide cell
[ ]
(a) Centigrade
(b) kilocalorie
(c) Kelvin
18. Which is the use of silver in electrical accessories?
(d) Fahren heat
[ ]
(a) Contact points (b) switch terminal (c) lamp terminal
(d) wire
19.The equivalent resistance of the parallel circuit is ____ than the smallest single resistance. [ ]
(a) greater
(b) smaller
20.One mega ohm is equal to _____ ohm.
(a) 1
(b) 1
(c) equal
(d) half
[ ]
(c) 1
(d) 1
MATCH THE FOLLOWING
21. Match the Formulae with the corresponding Laws
battery with the
FORMULAE
LAW
1. M=
A. OHM’S LAW
2.
B. Kirchhoff's law
3. J=
C. Faradays law of electrolysis
4.V=IR1 +IR2 +...+Rn
5.H= RT
22. Match the charged condition of the
hydrometer reading (specific gravity)
Specific gravity
Condition of battery
1. Full charge
A. 1.15
2. 60% charge
B. 1.22
3. Charge immediately
C. 1-25
D. JOULES LA
4. Discharged
5. 40% charge
D. 1.18
23. Match the magnetic quantities with the units
Magnetic quantities
1. Flux Density
2. Field strength
3. Magneto motive force
4. Field intensity
Units
A. Ampere turn
B. Weber/
C. Ampere turn/meter
PART-B
1.
2.
3.
4.
5.
(a) What is law of resistance?
(a) What is meant by magnetic flux density?
(a) What is the difference in primary and secondary cell?
(a) What is the principle of working of a generator?
parts of D.C. generator?
(a) What is meant by potential difference and joule’s law?
resistance in series?
Marks: 30
(b) Define Ohm’s law.
(b) What is eddy current?
(b) What is electrolysis?
(b) Which are the main
(b) What is meant by
ELECTRICIAN
MODEL PAPER - 3
PART A – MARKS: 70
Short Questions. Answer All.
Marks: 10
1. Which rotors are used in low and medium speed alternators?
2. In an alternator has 4 pole and it generator 50Hz. Calculate the synchronous speed of a 4 pole
50Hz alternator?
3. There are two earthings to be done for the alternators. What are two earthings?
4. In which type of motor, conveyor belt is used?
5. 3-Ф Induction motors are classified according to their rotor construction. What are the two major
types of 3-Ф Induction motor based on the rotor construction?
6. 1-Ф motors are generally referred to as fractional H.P. motor. Why is 1-Ф motors called?
7. A universal motor can run an AC and DC. In what principle does it works?
8. The speed of a universal motor reaches a dangerously high value at no loads. What is reason
after this very high speed?
9. Starting toque of a universal motor is 450% of full load torque on which type of supply, Universal
motor works.
10. Repulsion motor is used where the heavy loads running for a long duration. Give two
applications of repulsion motor?
Multiple choice Questions
Marks: 10
1. Which of the following motor does not have wound rotor?
(A)Spilt phase motor
(B) repulsion motor
(C) Universal motor
[ ]
(D) Dc shunt motor
2. What is the application of capacitor start Induction run motor?
(A) Ceiling fan
(B) Washing machine
(C) Mixer grinder
[ ]
(D) Tape recorder
3. Which are of the following 1-Ф motor performing with better P.F?
[ ]
(A) Universal motor (B) Washing machine (C) Capacitor start motor (D) Capacitor run motor
4. Which formula is used to find the load current of 1-Ф motor?
(A)
(B)
(C)
[ ]
(D) vpsinФ
5. What is the formula to find out the % of slip in the Induction motor?
(A)
(B)
(C)
[ ]
(D)
6. What is rotation between frequency, speed and no. of poles of an alternator?
(A) f=120/PN
(B) f=N/120
7. Alternators are rated in
(C) 120P/f
[ ]
(D) PN/120
[ ]
(A) K.w.
(B) H.P.
(C) KvA
(D) KVAR
8. The function of capacitor in a capacitor start Induction run motor is for
[ ]
(A) Suppressing spark across centrifugal switch (B) making current to lead in main winding
(C) Improving the P.F.
(D) Splitting the phase
9. The speed of a 6 pole, 60Hz alternator is
(A) 600 rpm
(B) 1200 rpm
[ ]
(C) 1800 rpm
(D) 3000 rpm
10. Which type of rotor is used in slip ring Induction motor?
(A) Wound rotor (B) Double cage rotor
[
]
(C) Deep bar cage motor (D) single cage rotor
Match the following
Marks: 10
1. Match the appliance with the type of motors
Appliance
1.
2.
3.
4.
5.
Type of motors
Domestic sewing machines
Window air conditioners
Portable electric drills
Domestic pumps
Ceiling fans
[
[
[
[
]
]
]
]
A. Capacitor start Induction run motor
B. Permanent capacitor motor
C. Double capacitor motor
D. Universal motor
2. Match the name of the parts of Induction motor with the labeled parts in the figure.
Name of the parts
1.
2.
3.
4.
5.
Yoke/Frame
3rd winding
Terminal box
Stator core
Laminated steel core
Stator of Induction motor
[
[
[
[
[
]
]
]
]
]
PART – B
1. a. What is the complete formula for frequency?
b. Name the different types of 1-Ф motors?
2. a. Write the characteristics of squirrel cage motor?
b. Write the working principle of A.C. 1-Ф motor?
3. a. Which method s of stating 1-Ф motor?
b. Why is 1-Ф motor not self started?
4. a. Write the defects in A.C. 1-Ф motors?
b. Write the mechanical faults an A.C. 3-Ф motors?
5. Write short notes on D.O.L. starter?
ELECTRICIAN
MODEL PAPER - 4
PART A – MARKS: 70
SHORT ANSWER QUESTION
Marks : 70
1. The relationship between power, voltage and current can be represented by a divided triangle.
Draw a power triangle for D.C. circuit
2. The brushes of a food mixer are fully worn out. State two symptoms of worn-out brushes.
3. The statically induced emf has a polarity which opposes the voltage that created it.
What is the other name by which this induced emf is known as?
4. After rectifying the short circuited in a eclectic toaster you have to replace the blown out fuse.
The old fuse was rated for a current of 1A? What will happen if you use a fuse with 0.3A?
5. For terminating a cable into screw on terminal the conductor should be looped.
What is the tool used for looping the conductor?
6. When a battery is kept long time in discharged condition, its plates color is changed into whitish
color. What is the name of the defect?
7. According to Faraday’s laws, there are two types of emf can be induced in a coils.
What are the two types of emf?
8. State the relation between back emf and speed?
9. Watt meter is used to measure the power?
10. 3-Ф induction motors ae classified according to their rotor construction. What are the two major
types of 3-Ф induction motor based on the rotor construction?
11. In the figure, part of a fluorescent lamp
circuit is shown. What is name of this part?
12. In an alternator has 4pole and it generate 50Hz.
Calculate the synchronous speed of a 4pole 50Hz alternator?
13. The power factor depends as the type of load.
What will happen to the power factor, if the reactive power is increased?
14. The N.V.C.is connected in series with the field winding in 3 point starter of DC motor.
What
will be the size and no. of turns of a 100volt coil?
15. A full changed cell will indicated 1.8v to 1.6v.
which equipment is needed to measure these volt?
MULTIPLE CHOICE QUESTIONS
16. The unit of luminance flux is
[ ]
(a) candela
(b) lose (c) lumen
(d)lumen/flux
17. How many numbers of slip rings are required for a rotating field type 3Ф alternator?
[ ]
(a)6
(b) 2
(c) 3
(d) 12
18. What is the unit of conductance?
[ ]
(a) ohm
(b) Henry
(c) farad
(d) mho
19. Which of the following materials is a paramagnetic substance?
[ ]
(a) Iron
(b) glass
(c) aluminum
(d) nickel
20. Which of the material is used to fix the screw on can create wall and ceiling?
[ ]
(a) link clips
(b) bushings (c) saddles
(d) rowel plugs
21. The value of line voltage in two phase system is
(a) Vphx
(b) Vph
(c) Vphx2
[ ]
(d) Vph/2
22. The speed of a 6pole,60Hz alternator is
[
(a) 600rpm
(b) 1200rpm
(c) 1800rpm
(d) 3600 rpm
23. What principle makes the instrument transformer working?
[
(a) self induction (b) Lenz’s law (c) mutual induction (d) Fleming’s right hand rule
24. Which are of the following 1Ф motor performing with better power factor?
[
(a) universal motor (b) Repulsion motor (c) capacitor start motor (d) capacitor run motor
25. Which color wire is recommended for earth connection as per ISI code?
[
(a) Red
(b) Green
(c) Black
(d) Blue
]
]
]
]
MATCH THE FOLLOWING
26. Match the charged condition of the battery with the Hydrometer reading.
Condition of Battery
Specific gravity(Hydrometer reading)
1. Full charge
[ ]
A. 1.15
2. 60% charge
[ ]
B. 1.22
3. Change immediately
[ ]
C. 1.25
4. 40% charge
[ ]
D. 1.18
5. Discharged
[ ]
27. Match the purposes with their corresponding electrical devices purpose
1. Protection of circuit
[ ]
A. MCB
2. On/off control
[ ]
B. ICDP switch
3. Automatic tripping
[ ]
C. voltage regulation
4. Adjustment of voltage
[ ]
28. Match the quantities with the units of illumination
Quantities
Units
1. Luminous intensity
[ ]
A. Lumen
2. I luminance
[ ]
B. Lux
3. Luminous efficiency
[ ]
C. Lumen/watt
4. Illumination
[ ]
D. Candela
5. Luminous flux
[ ]
PART – B
1.
2.
3.
4.
5.
[ ]
Marks: 30
Define ohm’s law.
b. Describe the purpose of earthings?
a. Explain the purpose of the fuse in a circuit?
b. State the Faraday’s laws of electromagnetic induction.
a. What is meant by slip in an induction motor?
b. State common defects of lead acid battery?
a. A 5 kW, 50 Hz, 6 pole slip ring induction motor runs at 960 r.p.m. calculate
i.Sync.speed ii. %slip b. What is power factor?
a. What are the main parts of a DC generator?
b. Why is 1Ф motor not self started?
a.
ELECTRICIAN
MODEL PAPER - 5
PART A – MARKS: 70
SHORT ANSWER QUESTIONS
1. 3-Ф Induction meters are classified according to their rotor construction.
What
are the two major types of 3-Ф Induction motor based on the motor construction?
2. Watt meter is used to measure the power. Which type of power it measures in AC?
3. The turning or twisting moment of a force about an axis which is equal to the product of force
and the radius of the pulley of DC motor. What is the term called for the above statement?
4. Quality of electricity is defined as the product of current and time. What is the unit of it?
5. In an atom, nucleus has proton and neutron. What are the charges proton and neutron having?
6. The maximum current a fuse can carry before it melts and open, the circuit is called the railing of
fuse.
7. A heater is rated as 1000w, 250v. What is the heater resistance?
8. It is an electrical property of an electrical circuit or device which opposes any charge in the
magnitude of current flow in a circuit.
(a).
What is the above said electrical property called?
(b). What is its unit
9. The armature windings are mainly classified into two types.
What are the two types of armature windings?
10. The power factor depends on the type of load.
What will happen to the power factor, if the reactive power is increased?
11. In a delta connection the line voltage is equal to phase voltage? What is the line current with
respect to phase current in delta connection?
12. Normally the field system of alternator is exited from a separate source of law voltage DC supply?
(a)Name the source? (b) What type of machine is used or the above purpose?
13. Instrument transformer are classified into two categories, potential transformer is one type.
What is the other type?
14. 1-Ф motors may be broadly classified as two types, according to their construction and method
of starting. What are the two main classifications of 1-Ф motors?
15. Choke is an important part in fluorescent lamp circuit. What is the function of choke?
MULTIPLE CHOICE QUESTIONS
16. Which is the application of spot light?
(a) stadium (b) Theatre (c) Park (d) House
17. The ratio of no. of slots in the stator to the no. of poles Is called as
(a) coil pitch (b) pole pitch (c) coil throw
(d) coil span
18. How many no. of poles are in a 3-Ф Induction motor, which is rating at 1440 r.p.m.
(a) 4
(b) 2
(c) 6
(d) 8
[ ]
[ ]
[ ]
19. Silica gel is used to absorb the moisture from air entering into transformer. Where the silica gel is placed?
(a) Buchholz relay (b) Transformer tank (c) conservator (d} productive conductor
20. If a metal plate and a pipe are electrically connected to the general mass of the Earth, what is it called?
21. What is the unit of torque of a DC motor in SI unit?
[ ]
(a) kilogram-meter
(b) Newton-centimeter (c) Joule (d) Newton per meter
22. The formula of find out the quantity of electricity is
(a) voltage x current (b) current x time (c) power x time (d) current x resistance
23. The commercial unit of electrical energy is
(a) joule (b) watt-hour (c) kilowatt-hour (d) watt-second
24. What will be the value of voltage in fully discharged condition of a lead acid cell?
(a) 2.1v
(b) 1.8 (c) 2v
(d) 1.7v
25. In which material, the split rings are made?
(a} Gun metal (b) Brass
(c) Hard drawn copper (d) Bronze
MATCH THE FOWLLOING
[ ]
[ ]
[ ]
[ ]
26. Match the test that to be carried out with the instruments suitable for troubleshooting.
Tests
Instruments
1. Measure the load current of an AC motor
A. Multimeter
Without interrupting the circuit.
2. Check the coils for insulation resistance
B. Tong tester
Values between them.
3. Check continuity of a winding using main supply.
C. Series test lamp
4. Check the winding of an auto-transformer for
D. Megger
Its insulation resistance to core and winding.
5. Use a single instrument to check either the
Continuity or measure the input voltage.
27. Match the purposes with their corresponding electrical devices.
Purposes
Electrical Devices
1. Protection of circuit
A. MCB
2. On/off control
B. ICDP switch
3. Automatic tripping
C. Voltage regulator
4. Adjustment voltage
28. Match the formulae with the terms of DC motor.
Formulae
Terms of the DC motor
1.
A. Electrical power supplied to armature
2.
B. Back e.m.f.
3. EbIa
C. Armature torque
4. V-IaRa
PART – B
1. a. What is meant by alternator? What are the main parts of the alternator?
2marks
b. What is the complete formula for frequency?
1mark
c. A 3-Ф alternator with 4 poles, speed is 1500 rpm and slots are 96. Calculate the frequency of
the alternator?
3marks
2. a. what do you mean by transformer?
2marks
b. What are the main parts of transformer?
2marks
c. How many types of transformers are their based on their uses?
2marks
3.
.
..
a. What is electrolysis?
b. Name the different parts of a battery?
c. What are differences in primary and secondary cell?
2marks
2marks
2marks
4.
5.
a. What is meant by specific resistance?
2marks
b. Define Fleming’s right hand rule and potential difference?
4marks
a. Define Ohm’s law?
2marks
b.. What is primary and primary and secondary cell?
2marks
C. Explain briefly “back e.m.f” in a DC motor?
2marks
ELECTRICIAN
MODEL PAPER - 6
PART A – MARKS: 70
SHORT ANSWER QUESTIONS
1. In an AC Sine wave the number of cycles produced per second is called frequency. What is the
units of frequency?
2. A total opposition to an AC can be offered by its resistance, inductive reactance and capacitive
reactance. What is the term called for the above definition?
3. The RLC series circuit, if the value of XL and XC are equal and the power factor is unity. What is
this circuit called?
4. You are connecting a 3-Ф Induction motor. If you connect starting ends of all the three winding
together and give 3-Ф supply to the other three ends. Which type of connection you have made?
5. In star connection, the three similar ends are connecting together, and it is the value of current in
the neutral conductor . When connected in star?
6. Basically three or two types of iron cores used to accommodate the winding in a transformer.
What are the two types of core?
7. There are two losses occurred in transformer? What are the two losses?
8. Voltage transformer ratio is expressed in = =k,If k is less than 1,what is the name of the
transformer?
9. Instrument transformer are classified into two categories. Potential transformer is one type.
Which is the other type?
10. There are two types of potential transformers according to its core .There are shell type and core
type. Which type of potential transformer can be used to low voltage transformer?
Multiple Choice Questions
10marks
1. What is the working principle of the two winding Transformer?
(a) Self induction (b) Mutual induction (c)Principle of DC motor (d) Leng’s law
[
]
2. Silica gel is used to absorb the moisture from air entering into transformer. Where the silica gel is
paced?
(a)Buchholz relay (b )Transformer Tank (c )Conservator ( d )Breather
[ ]
3. What is the working principle of auto transformer?
(a) Self Induction (b)Mutual Induction (c) D.C.motor principle (d) Fleming’s left hand rule [
]
4. Balanced load means, all the 3-Ф has____
(a)Equal power factor (b) Equal phase current (c)Equal power factor and phase current
(d) Equal line current
[
]
5. In a 3-Ф system the voltage across phase to phase is called
(a) E M F (b) Terminal voltage (c) Phase voltage (d) Line voltage
6. Line voltage of a star connected 3-Ф circuit is 415v. The phase voltage will be----
[ ]
(a) 415v (b) 210v (c) 220v (d) 240v
[ ]
7. If the frequency is 50Hg,what is the time taken to complete one cycle.
(a) 0.2 sec. (b) 0.02sec. (c) 2sec (d) 0.002sec.
[ ]
8. What is the unit of induction reactance?
(a) Henry (b) Ohm (c) Ampere turn (d) Susceptance
[ ]
9. What of the following is used to provide inductance in a circuit?
(a) Resistance (b) Choke (c) Capacitor (d) Heater
[ ]
10.Which type of connection in 3-Ф transformer is used for the substation end of the transmission line?
(a) Star-Star (b) Star-Delta (c)Delta-Delta (d) Delta-Star
[ ]
MATCH THE FOWLOWING
10MARKS
1. Match the Electrical Quantities with their units
Units
Electrical Quantities
2.
1. Electrical Power
A. Henry
2. Inductive reactance
B. Ohm
3. Capacitance
C. Watt
4. Inductance
D. Farad
5. Impedance
Match the formulae with corresponding Quantities of AC supply system.
Formulae
AC supply system
1.
I2=Ip
2. V2=Vp
3. P=VIcosФ
4. V2= Vph
5. Phase voltage/Phase resistance
PART – B
A. 3-Ф star connection
B. 3-Ф Delta connection
C. Phase current
D. 1-Ф system
30 MARKS
1. (A) What is power factor? (B) Why are transformers used in distribution system?
2. (A) Describe the purpose of earthing? (B) What is the purpose of breather?
3. Define below.
(a) Impedance (b) Lenz’s law (c) Capacitance (d) Resistance.
4. (A) Write short notes an step-up and step-down transformer.
(B) What is mean R.M.S. value ?
5. Define below.
(a) Star connection (b) delta connection (c) Earthing (d) Buchhole’s relay
ELECTRICIAN
MODEL PAPER - 7
PART A – MARKS: 70
Short answer Questions
1. The electrical accessories and components are always represented by ISI symbols in electrical
circuits. Draw the symbol for fuse.
2. In an atom, nucleus has proton and neutron. What are the charges proton and neutron having?
3. When the current with light frequency is passing through vacuum tube some effect will occur?
4. In a circuit when one amp current is passed for one second, then it is called as quantity of
electricity.
5. The magnetic losses are occurred in the core materials. What is the unit of it?
6. The maximum current a fuse can carry before it melts and opens, the circuit is called the rating
of fuse. In which quantity the fuses are rated.
7. A bulb is rated by its voltage and wattage. Write the formula to find its resistance by using
voltage and wattage?
8. What is the method of heat transfer accomplished in a
a. Hot water boiler
b. Electric Iron
9. Quality of electricity is defined as the product of current and time. What is the unit of it/
10. What will happen to a battery charger, when there is a short in capacitor of filter circuited/
11. Identify the fault in the battery
Charging circuited shown
12. What will happen, if a fully charged battery has not been used for a long period?
13. The statically induced emf has a polarity which opposes the voltage that created it. What is the
other name by which this induced emf is known as?
14. THE RATIO BETWEEN FLUX DENSITY AND FLUX INTENSITY IS CALLED PERMEABILITY OF THE
MAGNETIC SUBSTANCE.
A. WHAT IS THE UNIT OF PERMEABILITY?
B. HOW COULD A MATERIAL BE CALLED IF ITS PERMEABILITY IS LESS THAN UNITY?
MULTIFUL CHOICE QUESTIONS
1. A material is slightly repeated by a magnet is called
a. Magnetic
b. paramagnetic
c. Dia magnetic
2. Which are of the substance has low reluctance?
a. Graphic
b. Nickel
c. Aluminum
3. Telsa is the SI unit of
a. Flux
b. Flux density
c. Mont
4. What is the factor which is not a cause for electric fire?
d. Ferro magnetic
d. Bismuth
d. flux Mont
a. Wrong rated fuses
c. Damaged insulation between line and neutral
b. Loose connection
d. Phase reversal in 3 phase system
5. Which one is the ISI symbol of socket outlet used in layout
6. The total resistance of a 30 ohm resistor and a 60 ohm resistor connected in parallel is
a. 20 ohm
b. 45 ohm
c. 90 ohm
d. 15 ohm
7. The ohms law can be represented in triangle. Which triangle does represented correct ohm’s
law?
8. What is the magnitude of the current in branch OX of the circuited shown in the fig?
a. 1.5 A
b. 6.5 A
c. 10.5 A
d. 11.5 A
9. What is the primary function of a fuse?
a. To protect the appliances
c. To protect high current flow
b. To open the circuit
d. To protect the line
10. Normal current capacity of a certain cable is 16 amps. If the circuit is protected by the closeexcess current protection, then the current capacity of the cable will be
a. 12 A
b. 13
C. 16 A
D. 20 A
MATCH THE FOLLOWING
1. MATCH THE NAME OF MATERIAL WITH THE CORRESPONDING CLASSIFICATION
Name of the materials
Classifications
1. Porcelain
A. Conductor
2. Silver
B. Insulator
3. Silicon
c. Semi-conductor
4. Glass
2. Match the charged condition of the Battery with the Hydro meter reading (specific gravity)
Condition of Battery
Specific gravity
1. Full charge
A. 1.15
2. 60% charge
B. 1.22
3. Charge immediately
C. 1.25
4. 40% charge
D. 1.18
5. Discharge
3. Match the magnetic quantities with the corresponding electrical quantities.
Magnetic quantities
Electrical quantities
1. Flux
A. EMF
2. Magnetic Motive Force
B. Current
3. Reluctance
C. Conductance
4. Permeance
D. Resistance
5. 5. Magnetic lines of force
4. Name
1. Cell
Symbol
A.
2. Battery
B.
3. Earth
C.
4. D.C.
5. A.C.
D.
E.
PART-B
1. A. Define ohm’s law? B.Write any two precautions should be taken while using of hand drill?
2. A. Write the properties of Insulators?
b. Write differences between primary and secondary cell?
3. Define following
a. Inductance
b. Electrolysis
c. EMF
4. a. A rheostat of 10 ohms is drawing as current 4.5 amps. Determine the power loss?
b. A torch battery with an e.m.f. of 6v and having negligible resistance supplies a lamp with a
current of 0.3 A .What is the resistance of the lamp?
5. a. State the faradays laws of Electromagnetic Induction
B.What is meant by potential difference and Joule’s law?