| Post Name | Training Officer - ST Development Department |
|---|---|
| Department | KERALA HIGHER SECONDARY EDUCATION. Category No : 736/2021 |
| Question Paper Code | 053/2023/OL |
| Category Code | 191/2019 |
| Date of Test | 2 June 2023 |
| Exam Type | Online Examination |
| Total Questions | 100 |
1
The arterial roads of a state connecting up with National Highways of adjacent state, district headquarters, important cities in the state serving as main arteries for traffic to and from districts is called
Answer
B. State Highways
2
Institutional buildings are under the category of ___________ as per NBC.
Answer
C. Group C
3
The space covered by the floor of the property, along with the area covered by its internal and external walls is called
Answer
A. Plinth Area
4
Soil material which is derived from rock bedding and has not undergone transportation is called
Answer
A. Residual soil
5
Symons Rain gauge comes under
Answer
A. Non recording type Rain Gauge
6
Marble is an example of
Answer
C. Metamorphic Rock
7
Yellowish or red stains in timber due to over maturity and insufficient ventilation during storage is due to
Answer
B. Foxiness
8
The mix proportion of M10 concrete is
Answer
C. 1 : 3 : 6
9
Wrought iron is manufactured from
Answer
A. Reverbaratory furnace
10
The specific gravity of plastic is
Answer
B. 1.3 to 1.4
11
Alternate courses of stretchers and headers are laid in
Answer
C. English bond
12
The vertical distance between wall plate and top of ridge is called
Answer
B. Rise
13
The speed of lift car upto 4 floors is
Answer
B. 0.5 to 0.75 m/s
14
The diameter of under reamed piles is normally
Answer
B. 2.5 times the diameter of pile stem
15
Foundation is provided to
Answer
D. All of the above
16
Carnot cycle consists of the processes
Answer
A. Two reversible isotherms and two reversible adiabatics
17
Efficiency of the Otto cycle is a function of
Answer
B. Compression ratio only
18
In a thermodynamic cycle if the energy is released by combustion of fuel party at constant volume and partly at constant pressure is
Answer
C. Limited pressure cycle
19
Network done in a reciprocating IC engine is
Answer
A. m.e.p × displacement volume
20
In an IC engine mechanical efficiency is
Answer
D. 1, 2 and 3 are correct
21
In a vapour compression refrigeration system wet compression causes i. No cylinder head damage ii. Cylinder wear
Answer
B. (i) is wrong (ii) is correct
22
If the wet bulb depression is zero then i. Ambient air is saturated and RH is 100% ii. WBT and DBT are equal
Answer
C. (i) and (ii) are correct
23
By fitting air vessel to the reciprocating pump i. Discharge of the water can be made uniform. ii. Pump can be run at high speed. iii. Work done in overcoming the frictional resistance in the suction and delivery pipes can be reduced.
Answer
B. (i), (ii) and (iii) are correct
24
In a centrifugal pump ratio of impeller power to the prime mover power is
Answer
B. Mechanical efficiency
25
In a belt transmission when the centrifugal tension is taken into account
Answer
D. 1 is correct 2 is wrong
26
Instead of natural clay silica grains are coated with sodium silicate in
Answer
B. sand
27
In a mould to trap heavier and lighter impurities flowing towards the casting provide
Answer
C. Skim bob
28
Welded portion should be peened with a hammer i. To remove surface oxides and residual flux present on weld surface. ii. To provide compressive stress on the weld surface. iii. To provide tension on the weld surface.
Answer
A. Statements (i) and (ii) are correct and (iii) is wrong
29
In a lathe for holding and obtaining a hollow piece of work that has been previously drilled or bored
Answer
B. Mandrel can be used
30
To drill a hole in the metals like copper and stainless steel, point angle used in the twist drill is
Answer
C. 140º
31
Three 1 ohm resistors are connected to form a triangle. The resistance between any two corners is
Answer
C. 2/3 Ω
32
For the following circuit, the current I is
Answer
B. 2A
33
Kirchhoff's current law is applicable to only
Answer
C. Junctions in a network
34
Minimum number of meshes required to solve the given circuit is
Answer
C. 3
35
In nodal analysis, there are N nodes in the circuit. Number of equations required to solve the network.
Answer
B. N – 1
36
The magnetic flux density in an air-cored coil is 0.05 Wb/ . With a cast iron core of relative permeability 400 inserted, the flux density will become
Answer
B. 20 Wb/
37
According to Faraday's Laws of Electromagnetic induction, an e.m.f. is induced in a conductor whenever
Answer
B. There is a rate of change of magnetic flux through the conductor
38
Two coupled coils connected in series have an equivalent inductance of 8 mH or 4 mH depending on the interconnection. Then the mutual inductance M between the coils is
Answer
A. 1 mH
39
The rms value of a sine wave is 230 V. Its peak value is
Answer
B. 325.27 V
40
An alternating current is given by i = 10 sin 314t. Measuring time from t = 0, the time taken by the current to reach – 10 A for the second time is
Answer
D. 0.035 second
41
The applied voltage is 200√2 sin(100πt) V and the current is 20√2 cos(100πt + π/4) A. Taking voltage as reference, the current phasor is:
Answer
C. 20 ∠ 3π/4
42
The power factor of a series RLC circuit is
Answer
B. Between zero and 1
43
In a series RLC circuit, the inductance is changed from L to L/2. For the same resonant frequency, the capacitance should be changed from C to
Answer
A. 2 C
44
In a series RL circuit, is the current through resistor and is the current through inductor, then
Answer
A. is in phase with
45
A voltage of 100 Ð 20º V drives a current of 10 Ð 80° A through a single phase load. The power consumed by the load is
Answer
D. 500 W
46
A resistor has a colour-code bands Green Violet Brown Gold. It's nominal value is
Answer
B. 570 Ω 5%
47
Which of the following statement is/are true about a PN junction diode ? i. An ideal PN junction diode acts as an open circuit in forward bias and a short circuit in reverse bias. ii. The reverse-biased PN junction diode will have a very narrow depletion layer. iii. When the PN junction diode is reverse-biased, a very small current flows through the diode. iv. There are no free charge carriers in the depletion region.
Answer
D. Only iii and iv
48
Which of the following statement is/are true about Bipolar junction transistors ? i. The emitter current is always the largest. ii. A transistor is said to be in saturation when it does not conduct current. iii. The leakage current stops when emitter is disconnected from DC supply. iv. The total collector current is the sum of majority and minority charge carriers.
Answer
C. Only i and iv
49
In the output characteristics of a common emitter configuration
Answer
C. Avalanche breakdown cause to increase rapidly
50
Varistor is used to
Answer
B. Protect circuitry from high energy voltage transients
51
Which of the following statement is/are true about Bridge rectifier ? i. Entire secondary voltage can be used as the input to the rectifier. ii. If one diode opens, output frequency will be doubled. iii. Transformer used is larger as compared to center-tapped full wave rectifier. iv. Ideal peak output voltage is equal to a center-tapped full wave rectifier.
Answer
C. Only i
52
Which of the following statement is/are true about Zener Diode used as a voltage regulator ? i. Breakdown voltage increases with increase in current. ii. If load current changes output voltage remains constant. iii. Minimum value of Zener current must be maintained in order to keep the diode in Breakdown region. iv. The load voltage is zero when it is operating in the breakdown region.
Answer
A. Only ii and iii
53
Which of the following statement is/are true about Public Address system ? i. Must reduce reverberations. ii. Microphone is a transducer used to convert electrical signal to sound signal. iii. It must increase the acoustic feedback.
Answer
A. Only i
54
In the frequency response curve of a RC coupled amplifier
Answer
C. Voltage gain drops in the higher frequency range
55
In a common emitter amplifier
Answer
D. The output will have the same frequency as the input but with 180 degree phase shift
56
Comparing AM transmission and FM transmission i. AM radio is a line of sight system ii. AM broadcast band has higher frequencies than FM broadcast band iii. FM has noise immunity advantage iv. FM has higher fidelity
Answer
A. Only iii and iv
57
An audio signal of 5 kHz frequency is amplitude modulated with a carrier signal of 1.6 MHz frequency. Which of the following statement is true ?
Answer
D. The sideband frequencies are 1605 kHz and 1595 kHz
58
All the succeeding stages of a super heterodyne receiver operates on
Answer
A. Intermediate frequency
59
Which of the following is true with respect to antenna ? i. To make it more directional, its size must be reduced. ii. The efficiency of antenna will be 62.5% when antenna resistance is 30% and radiation resistance is 50%. iii. Minimum length of the antenna required to send a signal of frequency 500 kHz is 150 m.
Answer
D. Only ii and iii
60
Which of the following statements are true ? i. Fading of signals is caused due to obstacles. ii. Handoff is the process of transferring a mobile telephone call from one cell to another without dropping the call. iii. Circle is a universally adopted shape of cell.
Answer
B. Only i and ii
61
The storage element within the processor is known as
Answer
C. Register
62
DRAM cell is made up of
Answer
D. Transistors and capacitors
63
After compiling the program code, the file that contains the resulting output is referred to as
Answer
D. None of the above
64
Program should be written as a single continuous block without any break in
Answer
B. Unstructured programming
65
The number of passes required to sort an array of n elements with bubble sort is
Answer
A. n − 1
66
This of the following is not a valid type modifier in C.
Answer
B. Byte
67
What will be the value of b in following code segment. #include int main() { int b = printf("Message"); printf("%d", b); return 0; }
Answer
C. 7
68
The data type which does not allowed as a switch expressionin C.
Answer
C. float
69
The following declaration in C indicates int p : 8;
Answer
A. p is an 8-bit integer
70
What will be the following code segment ? #include int main() { int x; for (x = 5; x!=0; x--) printf("%d", x--); return 0; }
Answer
D. Infinite loop
71
This of the following is not a valid 2-dimensional array declaration.
Answer
C. int arr[3][]={1,2,3,4,5,6};
72
Predict the output of following code segment. #include int main() { int array[10] = {1,2,3,4,5}; printf("%d", array[5]); return 0; }
Answer
A. 0
73
In the below code; what will be the value of x ? #include #include int main() { char s1[] = "hello"; char S2[] = "world"; int x = strcmp(s1, s2); printf("%d", x); return 0; }
Answer
C. Less than zero
74
This of the following is/are true about linear search performed in an array of size N. I. Linear search works only in ordered list of elements. II. The worst case; number of comparisons needed is N.
Answer
B. Only II
75
What does the string handling function strchr(s1, ch) does ?
Answer
B. Returns a pointer to the first occurrence of character ch in string s1
76
A body falling from a height of 10 m rebounds from the hard floor. If it loses 20% of energy in the impact, how high will it rebound ?
Answer
C. 8 m
77
Rain drops are falling with constant velocity near the surface of earth. Choose the correct alternative related to the above statement.
Answer
B. The above statement is true and is in accordance with Stoke's law
78
Choose the options which have correct statements about Laser in the three coloumns of table.
Answer
Question Cancelled
79
An electron in a constant electric field
Answer
D. will move in the opposite direction of electric field
80
9 Ohm and 2 Ohm are the effective resistance when two resistors are connected in series and parallel respectively. The individual resistances are
Answer
B. 6 Ohm and 3 Ohm
81
When an electron revolving around the nucleus of an atom
Answer
A. It is equivalent to a circular loop of current and will produce magnetic field
82
When two infinite parallel conductors are held parallel to each other and currents are flowing in the same direction
Answer
D. The conductors will attract each other and the attractive force depends on currents
83
A boy suffered from severe fever and admitted in the hospital. His body temperature is measured to be 100 by a thermometer. But when a drop of water accidently incident on his body, it didn't boil. Choose the correct reason for the above.
Answer
C. The thermometer is calibrated in Fahrenheit scale
84
Which of the following statements are correct related to the number of electrons and holes in a semiconductor ?
Answer
D. All of the above
85
In telecommunication waves are transmitted through an optical fibre by
Answer
B. Total internal reflection of waves
86
Evaluate
Answer
A. –
87
[[a, b], [−b, a]] [[a, −b], [b, −a]]. The product of these two matrices is
Answer
C. [[a² + b², −2ab], [0, b² − a²]]
88
The transpose of the inverse of the matrix A = [[2, 1], [1, 1]] is
Answer
D. [[1, −1], [−1, 2]]
89
The value of 2sin²(3π/4) + 2cos²(π/4) is
Answer
B. 2
90
If tan A = 5/6 and tan B = 1/11, then A + B is
Answer
B. π/4
91
cos 55° + cos 65° has value
Answer
C. cos 5°
92
Find the unit vector in the direction of the sum of the vectors î + 2ĵ − 5k̂ and 2î + ĵ + 3k̂
Answer
A. (3î + 3ĵ − 2k̂)/√22
93
Which of the following statements are correct about the dot product of two vectors. i. is a real number. ii. If, and are perpendicular then iii. The angle between two non zero vectors is given by
Answer
D. All the above
94
Find the area of a parallelogram whose adjacent sides are given by the vectors a⃗ = 3î + ĵ + 4k̂ and b⃗ = î − ĵ
Answer
C. √48
95
Find the derivative of the function e^[sin(log(18x))]
Answer
A. e^[sin(log(18x))] × cos(log(18x)) × (1/(18x)) × 18
96
If y = A cos(px) + B sin(px) (A, B, p are constants), then d²y/dx² is
Answer
B. −p²y
97
If x = k sec θ, y = m tan θ, find dy/dx; k and m are constants
Answer
C. dy/dx = (m/k) cosec θ
98
∫₀^(π/2) 3sin²x dx is
Answer
B. 3π/4
99
Find the area enclosed between the parabola y = x² − x − 2 and the X axis
Answer
D. 9/2
100
The solution of the linear differential equation dy/dx + (5/x)y = 8x is
Answer
A. x⁵y = (8/7)x⁷ + C
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