| Post Name | JUNIOR INSTRUCTOR (TECHNICAL POWER ELECTRONICS SYSTEM) |
|---|---|
| Department | INDUSTRIAL TRAINING |
| Question Paper Code | 078/2017/OL |
| Category Code | 468/2016 |
| Date of Test | 19 September 2017 |
| Medium of Question | ENGLISH |
| Exam Type | Online Examination |
| Total Questions | 100 |
1
During which decade did India see a negative population growth?
Answer
B. 1911-21
2
Kharif Crops are harvested in
Answer
A. October-November
3
Fiscal policy in India is formulated by
Answer
C. The Finance Ministry
4
On which date Indian Independence Act of 1947 got royal assent?
Answer
D. 18th July 1947
5
Who among the following is known as ''Mother of Indian Revolution''?
Answer
A. Bhikaji Rustam Kama
6
In which five year plan India opted for mixed economy?
Answer
D. Second
7
Which district in Kerala leads in the production of cashew nuts?
Answer
C. Kannur
8
Father of local self government in India
Answer
B. Lord Rippon
9
How many times Gandhiji visited Kerala?
Answer
C. Five times
10
Who was the first Portuguese Viceroy in Kerala?
Answer
D. Almeida
11
The 2017 Udyanotsav festival was held in which of the following cities?
Answer
B. New Delhi
12
Who has won the 2017 Men's Singles Australian Open Tennis tournament?
Answer
A. Roger Federer
13
Which of the following state has attained 100% Aadhaar saturation in India?
Answer
C. Himachal Pradesh
14
Which among the following is known as ''Sairandhri Vanam''?
Answer
B. Silent Valley National Park
15
Who wrote the famous book ''We the People''?
Answer
D. Nani Palkhivala
16
Who was the founder President of NSS?
Answer
A. K. Kelappan
17
Who called Sree Narayana Guru as the ''Second Buddha''?
Answer
B. G. Sankara Kurup
18
The social reformer who said ''Mind is God''?
Answer
A. Brahmananda Shivayogi
19
The headquarters of ''Prathyaksha Raksha Daiva Sabha''
Answer
C. Eraviperoor
20
Who started the publication journal called ''Abhinava Kerala''?
Answer
D. Vagbhadananda
21
Silicon has an atomic number of 14, this means the atom has 14 ____________.
Answer
B. Electrons
22
The most commonly used electrical conductor is ___________.
Answer
D. Copper
23
The opposition offered to the movement of electrons/current flow is known as __________.
Answer
A. Electric resistance
24
In a meter one main scale division is 5 volts, and it is divided into 10 small scale divisions. The meter can measure a minimum voltage of _____________.
Answer
B. 0.5 V
25
As the field intensity (H) in the core is increased, the flux density (B) ___________.
Answer
A. Increases
26
Material which can be strongly magnetised are known as ____________ materials.
Answer
C. Ferro magnetic
27
What material is used for making armature core?
Answer
A. Silicon steel
28
The speed of a universal motor ____________.
Answer
C. Is inversely proportional to the applied load
29
The basic unit of inductance is ___________.
Answer
C. Henry
30
Inductive reactance of a coil is directly proportional to the ___________.
Answer
D. All the parameters mentioned at A, B and C
31
Two capacitors C1 = 1 nf and C2 = 10 nf, are connected in series and applied to the battery voltage V = 11 V. What are the voltages across the capacitors?
Answer
B. VC1 = 10 V; VC2 = 1 V
32
Mutual induction is obtained by placing two current carrying coils ___________.
Answer
A. Side by side close to each other
33
The fundamental unit of measurement of resistance is ____________.
Answer
A. Ohm
34
For measuring unknown resistance, initially choose ____________.
Answer
A. The highest ohms range
35
When three resistors R₁, R₂ and R₃ are connected in series, the total resistance Rₜ =
Answer
A. R₁ + R₂ + R₃
36
Magnetic lines are concentrated at ___________.
Answer
D. Both the ends of the magnet
37
Generation and distribution of AC power in India is normally ___________.
Answer
B. 3 phase
38
The principle of operation of universal motor, similar to __________.
Answer
B. DC series motor
39
The flux density of a coil can be increased by inserting a __________.
Answer
B. Iron core
40
The frequency of induced emf in an AC generator is given by ___________.
Answer
C. PN/120
41
A charged capacitor acts like a ____________.
Answer
A. Temporary voltage source
42
The relation between frequency of an AC signal (F) and time period (T) is __________.
Answer
C. F = 1/T
43
A motor converts electrical energy into _____________.
Answer
B. Mechanical energy
44
When 2 inductors are in parallel, the effective value of inductance is given by LT = __________.
Answer
B. L1 × L2/L1 + L2
45
A transformer is an electrical device used to __________.
Answer
B. transfer electrical energy from one circuit to another without any direct electrical connection
46
A 3-phase transformer has ____________.
Answer
C. 3 primary and 3 secondary windings
47
A transformer has 800 turns in its primary winding and 200 in its secondary what is the primary voltage, if the secondary voltage is 40 V? Assume transformer losses as negligible?
Answer
D. 160 V
48
Efficiency of a transformer is the ratio of ___________.
Answer
A. Output power to input power
49
The basic unit of capacitance is ____________.
Answer
B. Farad
50
The relationship between charge (Q), voltage (V) and capacitance (C) of a capacitor is ____________.
Answer
A. C = Q/V
51
Identify the instrument which is NOT used for measurement of capacitance _________.
Answer
D. Kelvin bridge
52
The capacitive reactance Xc is given by __________.
Answer
B. 1/(2πFC)
53
Current flowing through a capacitor is given by ___________.
Answer
C. V/Xc
54
A semi conductor in its pure form is referred to as __________.
Answer
A. Intrinsic semiconductor
55
The process of adding impurities to a pure semiconductor __________.
Answer
D. Doping
56
The potential difference across a PN junction is referred to as _________.
Answer
B. Barrier potential
57
When a germanium diode is connected in forward biased mode the voltage across the diode will be ___________.
Answer
B. 0.3 V
58
When a diode is tested using an ohm meter. It indicates the low resistance in both direction. The condition of the diode is ___________.
Answer
B. Short
59
A forward biased diode starts conducting when the applied voltage reaches certain voltage known as ____________.
Answer
B. Barrier voltage
60
What value of the voltage is obtained directly from the wave form shown on a C.R.O when connected across the secondary of a transformer?
Answer
C. Peak-to-peak value
61
The main component used in a ripple filter circuit is the ___________.
Answer
A. Capacitor
62
The maximum forward current of an LED is about ____________.
Answer
B. 50 mA
63
Which colour LED has the lowest forward voltage drop?
Answer
A. Red
64
The time taken for etching PCB is in the range of ___________.
Answer
A. 5 to 20 minutes
65
The PCB side on which components are mounted is referred to as ___________.
Answer
B. Component side
66
The chemical used for removing copper from copper clad boards is called __________.
Answer
D. Etchant
67
In amplifiers, transistors are used for ___________.
Answer
A. Enlarging small electronic signals
68
A transistor can be thought of as two PN junction diodes connected as ____________.
Answer
B. PNNP
69
The advantage of transistors over vacuum tubes is ____________.
Answer
D. All the three, mentioned above
70
NPN transistors are preferred to PNP transistors for ___________.
Answer
A. Higher switching speed
71
Small signal amplifiers are also known as ___________.
Answer
C. Low power amplifiers
72
In transistors, the width of the collector layer is __________.
Answer
B. Much wider than the base region
73
The resistance measured by a multimeter between the anode and the cathode of good SCR should be ____________.
Answer
D. Infinity
74
In speed control circuits for DC motors using two SCR's _____________.
Answer
B. One SCR conducts in positive half cycle and the other in negative half cycle
75
Most common application of UJT is ____________.
Answer
C. Relaxation oscillator
76
DIAC is basically ____________.
Answer
B. A PNP/NPN transistor with no base connection
77
The speed of an AC motor can be controlled by using ____________.
Answer
D. DIAC with TRIAC
78
A power MOSFET is capable to handle current upto ___________.
Answer
D. 100 A
79
An IGBT is a hybrid form of ____________.
Answer
C. A bipolar transistor and a MOSFET
80
MOSFET's are used in ______________.
Answer
D. All the above
81
High speed switching can be obtained using a ____________.
Answer
A. Power IGBT
82
Power MOSFET and power IGBT are __________
Answer
C. Similar semiconductor devices
83
Which one of the following semiconductor device may be used as a light sensor?
Answer
D. Any one of the above
84
The material used for making optic-fibre cable in general is ___________.
Answer
B. Transparent plastic
85
Which one of the following IC contains NOT gates ___________?
Answer
B. IC 7404
86
Which of the following gates gives a high output with all its inputs high
Answer
C. OR
87
The logic gate which has 'high' output when its inputs are different is ___________.
Answer
B. EX-OR
88
The biggest advantage of ECL is ___________.
Answer
B. High speed
89
The term CMOS stands for
Answer
B. Complimentary Metal Oxide Semiconductor
90
A BCD-to-Decimal decoder converts
Answer
B. Binary code to decimal digits
91
The number of flip-flops required to construct a decade counter is ___________.
Answer
C. 4
92
The number of NOR gates required to construct R-S flip-flop is ____________.
Answer
B. 2
93
The basic building block of a counter is ___________.
Answer
D. Flip-flops
94
ROM is a non-volatile memory. The name of volatile memory is _______________.
Answer
D. RAM
95
Modern data storage device named 'pen drive' has a capacity of storing 16 GB data, what does it mean
Answer
A. 16 × 10⁹ bytes
96
An OP-AMP is designed to amplify
Answer
C. Both AC and DC voltage
97
DC operating voltage of IC 555 is
Answer
A. +5 to +18 V
98
Approximately what is the frequency limit of the optical fibre
Answer
D. 40 GHz
99
The higher the index number of a fibre optic cable _____________.
Answer
B. The lower the speed of light
100
The three major groups in the optical system are
Answer
C. The transmitter, the cable and the receiver
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