| Post Name | LABORATORY TECHNICAL ASSISTANT - MAINTENANCE AND REPAIRS OF DOMESTIC APPLIANCES |
|---|---|
| Department | VHSE |
| Question Paper Code | 032/2015 |
| Date of Test | 19 February 2015 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
Ifa number of resistances are connected in parallel , the effective resistances will be:
Answer
D. Less than the lowest resistance in the circuit
2
Direction of rotation of a de motor is determined by :
Answer
C. Flemming’s left hand rule
3
3.- Voltage of a fully charged lead acid cell is:
Answer
A. 2.1V
4
Which of the following has zero temperature coefficient of resistance?
Answer
C. Manganin
5
Mercury vapour lamp contain :
Answer
B. Argon and Mercury
6
If the full load iron loss of a transformer is 50 watts, then the iron loss at half load is:
Answer
C. 50W
7
Specific gravity of a lead acid cell is measured using:
Answer
D. Hydrometer
8
Aconstant speed motor is:
Answer
A. Synchronous motor
9
The highest transmission volage in Kerala:
Answer
B. 400 KV
10
When the lead acid cell is fully discharged the anode becomes?
Answer
A. y) PbSO;
11
The resistance of a wire is 2 ohm. If the diameter of the wire is reduced to half, keeping the
length same, the resistance of the wire will be : |
Answer
D. 8Sohm |
12
Equivalent binary number of a decimal number 21 is : |
Answer
A. 10101
13
P type semiconductor is obtained by adding: |
Answer
B. Boron to pure Germanium
14
The motor which works on ac and de supply is: |
Answer
D. Universal motor |
15
Condition for maximum efficiency of a transformer is:
Answer
A. Copper loss = Iron loss
16
A6 pole, 50Hz, slip ring Induction motor runs at full load slip of 4%, the full load speed is :
Answer
C. 960 rpm
17
Internal barrier voltage for silicon is :
Answer
A. O.7 V
18
| 18 AND gate has an output of 1 when:
Answer
A. both inputs are |
19
Emitter region of the transistoris: ‘
Answer
C. Heavily doped
20
The ripple factor of a bridge rectifier is :
Answer
D. 0.48
21
Kirchoffs law is applicable to :
Answer
C. both ac and de circuits
22
The value of coefficient of coupling is always :
Answer
C. less than 1
23
Ideal voltage source has :
Answer
A. Zero internal impedance
24
Armature reaction in de motor results in :
Answer
B. increase in speed
25
Which of the following device is used for Power factor correction?
|
Answer
D. Capacitor
26
An instantaneous voltage change is not possible in :
Answer
C. Capacitor
27
When resonance occurs in an electric circuit, the power factor is? :
Answer
B. One
28
Which of the following is an example of active component?
Answer
C. UJT
29
Star—Delta starter is used for starting : ‘
Answer
B. Squirrel cage induction motor
30
A lap wound 4 pole DC motor has 460 conductors. Find the number of parallel paths between
the conductors :
Answer
A. 4
31
The efficiency of half wave rectifier is :
Answer
B. 40.6%
_
32
Which of the following is used as voltage regulator?
Answer
C. Zener Diode
33
Which of the following is a bi-directional Device?
Answer
B. DIAC
34
Donor type impurities :
Answer
D. All of the above
35
The current controlled device is :
Answer
A. BJT
36
The armature resistance of DC motor is generally of the range :
Answer
B. 0.5 Ohm
37
What is the Unit of inductance?
Answer
B. Henry
38
Which of the following motor is used in ceiling Fan?
Answer
B. PSC Motor
39
The decimal equivalent of Binary 10111 is:
Answer
C. 23
40
In exclusive OR gate the output is Zero when the inputs are :
Answer
D. 1,1
41
Which region of the transistor characteristic is used for amplification?
Answer
A. Active
42
n-type semiconductor :
|
Answer
C. Is electrically neutral
43
Creeping error is occurred in:
Answer
A. Energymeter
44
The CPU of a computer consists of : |
Answer
D. ALU and control unit
45
Which of the following is used for serial access storage only? |
Answer
B. Magnetic tape |
46
Maximum load that can be connected in a sub circuit : |
|
Answer
C. 800 W
47
The length of the earth pipe used in pipe earthing :
Answer
A. 2.5m
48
Insulation resistance can be measured using:
Answer
C. Megger
49
Maximum load that can be connected to a single phase domestic connection:
Answer
C. 5,000 W
50
Inductor stores energy in:
Answer
A. Magnetic field
51
A capacitor :
Answer
C. allows ac to pass and blocks de
52
Fuse wire is made up of: | |
Answer
B. Lead and tin |
53
Transformer capacity is specified in:
Answer
D. KVA
54
Which of the following is used as Universal gate?
Answer
D. Both (A) and (C)
55
The electrolyte used in lead acid cell is :
Answer
B. _sodil HaSO.
56
The tidal project in Kerala:
Answer
A. Vizhinjam
57
a7. The power factor of incandescent lamp is:
Answer
D. unity
58
Which of the following is incorrect?
Answer
D. SI unit of temperature is degree centigrade
59
The motor which hag highest starting torque :
Answer
B. de series
60
1HP 1s equal to:
|
Answer
C. 746 W
61
Voltmeter is connected in :
Answer
B. B) Parallel
62
Which of the following is an indicating instrument?
Answer
C. Ammeter
63
In an RLC series circuit the impedence is purely resistive when:
Answer
A. XL = XC
64
Form factor of alternating quantity is :
|
Answer
A. R.M.S value/Average value
65
Unit of illumination:
Answer
C. Lux
66
Inade shunt motor the direction of rotation of motor will reverse when :
Answer
A. Either the field terminals are reversed or armature terminals are reversed
67
What is the necessity of copper brushes in a dc motors?
Answer
D. None of these
32/2015 10 i
68
The transformer cores are laminated :
Answer
C. to reduce eddy current losses
69
The shaft torque of a de motor is less than the electromagnetic torque because of :
Answer
Question Cancelled
70
The collector current of a transistor is always :
Answer
A. less than emitter current
71
An amplifier can be converted to an oscillator using : .
Answer
A. Positive feedback
72
Damping torque in an indicating instrument is always :
Answer
C. opposite to the direction of motion of the moving system |
73
Moving iron instruments can be used for measuring :
Answer
D. both (A) and (B) | :
74
The reactance offered by a capacitor to alternating current of frequency 50Hz is 10 chm, If
frequency is increased to 100Hz, then the reactance becomes ———————— ohms.
Answer
B. 5
75
The average value of alternating current is :
Answer
B. 0.637 Im
76
Mutual Inductance between two magnetically coupled coils depends on: |
Answer
D. All of the above
77
Ina pure inductive circuit :
Answer
A. active power consumed is zero
78
Transformer is used to change the values of: ey
Answer
A. voltage
79
The armature winding of series motor is excited :
Answer
B. conductively
|
80
In squirrel] cage induction motor, the rotor slots are given a slight skew : . |
|
Answer
B. to reduce the magnetic hum and locking tendency of the rotor
|
81
The biggest port of India :
Answer
B. Bombay
82
Which one of the following states of India has the highest rank in the human development
index?
Answer
D. Kerala |
83
The largest soil group of India : |
Answer
A. Alluvial soil
84
Which one of the following states, groundwater utilization is very high? .
Answer
C. Punjab
85
The volunteer brigade khudaikhidmatgars organised by :
Answer
B. Khan Abdul Gaffar Khan
86
At Lucknow the revolt of 1857 led by :
Answer
C. Begum Hazarat mahal
87
87.- Gandhiji's first great experiment in satyagraha came in 1917 is:
Answer
A. Champaran
88
The great poet and humanist Rabindranath Tagore gave up his knight hood in protesting :
Answer
D. Jallianwala Bagh massacre
89
Which one is not an indicators of social empowerment?
Answer
B. Freedom from politics |
90
The site ‘Overbury’s Folly situates at :
Answer
A. Thalassery
91
Whowas the owner of the newspaper Swedesabhimani?
Answer
C. Vaikkam Abdul Khadir Maulavi
92
The founder of Atmavidya sangam was :
Answer
D. Vagbhatananda
93
Which one of the following incidents, Gandhiji haild it as “a miracle of modern times and a
Smrithi which is the people’s charter of spiritual emancipation”?
Answer
B. Temple entry proclamation
94
Who was the founder of Sadhujana paripalana yogom?
Answer
C. Ayyan Kali
95
One of the highlights of the Vaikom satyagraha was the savarna jatha organised under the
leadership of :
Answer
D. Mannath padmanabhan
96
Who was selected as the goodwill ambassador of national games 2015?
Answer
D. Sachin Tendulkar |
97
Who among the following selected for Jnanapith award 2013?
Answer
A. Kedar Nath Singh
98
The highest goal scorer in FIFA world cup history :
Answer
C. } Miroslav Klose
99
‘The Dada saheb phalke award for 2014 has been conferred on :
Answer
Question Cancelled
100
40° G—7 summit 2014 held at:
Answer
B. Brussels
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