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Name the scientist who discovered bacteria ?
Robert Koch
James Chadwick
Eugen Goldstein
A V Leeuwenhoek
Correct answer
Robert Koch
If a body has a specific gravity of less than 1, then it will float in/on ___________.
air
water
liquids
mercury
Correct answer
air
Which of the following options does not have an SI base unit?
Amount of substance
Frequency
Luminous intensity
Electric current
Correct answer
Amount of substance
How many medals did India win in Rio Olympics, 2016?
3
4
2
5
Correct answer
3
It is mainly due to the gravitational effect of the __________ on the rotating earth that the level of water in the sea rises and falls.
Venus
Mercury
Moon
Sun
Correct answer
Venus
Two resistance of 2Ω and 6Ω are connected in series and this combination is connected across a 12 V battery. Find the current in the 6Ω resistor.
3.5 A
0.5 A
2.5 A
Correct answer
3.5 A
Substances that are broken down by biological processes are said to be _________.
reusable
non-biodegradabl
non-reusable
biodegradable
Correct answer
reusable
A software program that has been developed to harm other computers is called a/an _________.
server
LAN
malware
operating system
Correct answer
server
Kuchipudi has its roots in which Indian State?
Arunachal Pradesh
Kerala
Andhra Pradesh
Himachal Pradesh
Correct answer
Arunachal Pradesh
Which Indian cricketer received the Padma Bhushan in 2018?
MS Dhoni
Virat Kohli
Sachin Tendulkar
Saurav Ganguly
Correct answer
MS Dhoni
JPEG stands for __________.
Joint Program Experts Group
Joint Program Executing Group
Joint Photographic Experts Group
Joint Program Experimental Group.
Correct answer
Joint Program Experts Group
Two resistors, one of 12 Ω and the other of 24 Ω are connected in parallel. This combination is connected in series with a 22 Ω resistor and a 12 V battery. The current in the 12 Ω resistor is __________.
(8/15) A
(2/15) A
(6/15) A
(4/15) A
Correct answer
(8/15) A
RK Narayan is famous for his book ___________.
The Room on the Roof
Two Livers
Malgudi Days
A suitable Boy
Correct answer
The Room on the Roof
_________ protection must be worn whenever noise levels exceed the noise exposure standard.
Hearing
Head
Eye
Foot
Correct answer
Hearing
A wire of length 1 and radius r has a resistance R. The resistance of another wire made of the same material but having half its length and half its radius will be.
4R
R/2
2R
R
Correct answer
4R
Safety boots or shoes must be worn in designated areas to protect your _______ from falling objects.
eye
ear
head
feet
Correct answer
eye
A cylindrical wire of length L and radius r has a resistance of R. The resistance of another wire of the same material but thrice its length and one-third its radius will be __________.
27R
9R
R
3R
Correct answer
27R
If a body is NOT homogeneous, then its density is a function of its ___________.
pressure
acceleration
position
velocity
Correct answer
pressure
Two resistors of 10Ω and 20 Ω area connected in series and this combination is connected across a 30 V supply voltage. Find the voltage across the 10 Ω resistor.
20 V
10 V
5 V
15 V
Correct answer
20 V
Which one of these is a harvest festival?
Teej
Janmashtami
Deepawali
Onam
Correct answer
Teej
86°F is equal to __________
20°C
30°C
34°C
10°C
Correct answer
20°C
Where is the Headquarters of UNESCO located?
New York City
Geneva
Paris
Washington DC
Correct answer
New York City
Name of the painter of famous painting, ‘Mahishasura’.
MF Hussain
Amrita Sher-Gil
Raja Ravi Verma
Tyeb Mehta
Correct answer
MF Hussain
What is the work that needs to be done to increase the speed of a 1 kg ball from 2 m/s to 4 m/s?
8 J
10 J
6 J
12 J
Correct answer
8 J
The Ajanta Caves in Maharashtra feature paintings and sculptures that depict __________ tales.
Arabic
Islamic
Buddhist
Maratha
Correct answer
Arabic
The volume of a given amount of water ________ between 0°C to 4°C.
is zero
decreases
remains constant
increases
Correct answer
is zero
Two resistance of 2Ω and 6Ω are connected in series and this combination is connected across a 12 V bettery. Find the power supplied by the battery.
10 W
18 W
16 W
14 W
Correct answer
10 W
An object weighs X units on the earth. If we take the same object to the moon, its weight there will be ________.
zero
less than X
equal to X
more than X
Correct answer
zero
A body starts from rest. Its displacement is proportional to _________ when its acceleration is constant.
time squared
velocity
work
time
Correct answer
time squared
A source of voltage V maintains a current i in a circuit. The energy supplied to the circuit by the source in time t is __________.
Vit
1/Vit
Vi/t
V/it
Correct answer
Vit
Who was the first governor of the Reserve Bank of India?
Sir James Braid Taylor
KR Puri
HVR Iyengar
Sir Osborne A Smith
Correct answer
Sir James Braid Taylor
A car covers 400 m in 20 seconds. Find the average speed (in km/hr) of the car.
72
124
108
36
Correct answer
72
If sin θ = 15/17, then cot θ = ?
\(\frac{8}{{15}}\)
\(\frac{8}{{17}}\)
\(\frac{{15}}{8}\)
\(\frac{{17}}{{15}}\)
Correct answer
\(\frac{8}{{15}}\)
In an examination, the highest score and the lowest score are different by 55 and the higher one was 9/4 times the lower one. Find the lowest score.
40
36
44
48
Correct answer
40
A number is as much greater than 50 as it is lesser than 84. What is the number?
65
66
68
67
Correct answer
65
If \(x = \sqrt {125} \times \sqrt {30} \times \sqrt 6 \) , then x is equal to:
175
125
136
150
Correct answer
175
A got Rs. 80 as his share of profit where the total profit was Rs. 240 and the ratio of profit distribution between A and B was x : 2. What is the value of x?
1
4
2
5
Correct answer
1
What is the median of 8, 5, 7, 9, 11, 6, 10?
9
8
10
7
Correct answer
9
If 5050 × 0.5x = 25250, then 2505 ÷ x2 = ?
0.2505
25.05
2.505
250.5
Correct answer
0.2505
An article of marked price Rs. 12000 was sold. Had a discount of 15% been offered, a profit of 2% would have been made. What was the cost price?
Rs. 10,200
Rs. 10,000
Rs. 11,000
Rs. 10,800
Correct answer
Rs. 10,200
A sum of Rs. 2,000 was spent in buying a pair of trousers. The sum spent was 2/5th of the total money Shashi had with her. How much was the total money she had?
Rs. 4,000
Rs. 4, 250
Rs. 4, 750
Rs. 5,000
Correct answer
Rs. 4,000
A machine was bought for Rs. 1,500 and a repairing charge of Rs. 100 was paid afterwards. At what price should it be sold to gain a profit of 25%?
Rs. 2,040
Rs. 1,960
Rs. 2,000
Rs. 1, 920
Correct answer
Rs. 2,040
In angular measurement, one radian is equivalent to ________ degree (approximately).
65.27
57.27
90
180
Correct answer
65.27
A and B can do a work in 15 days. B and C can do the work in 20 days and A and C can do the work in 10 days. In how many days will they together completed the work?
10.67 days
10.91 days
10.71 days
9.23 days
Correct answer
10.67 days
Pipes A and B can fill a tank in 12 minutes and 16 minutes respectively. Both A and B are opened for 4 minutes and then A is closed. How much extra time will B take to fill the tank completely?
\(\frac{{20}}{3}\) minutes
7 minutes
\(\frac{{21}}{4}\) minutes
6 minutes
Correct answer
\(\frac{{20}}{3}\) minutes
A can do 2/5 of a work in 10 days. B can do ½ of the some work in 10 days. They worked together for 5 days and then A left. In how many days will B finish the remaining work?
8
10
11
9
Correct answer
8
Reflection of point (-2, -6) on the Y-axis is:
(2, 6)
(-6, -2)
(-2, 6)
(2, -6)
Correct answer
(2, 6)
The pie chart shows the breakup in percentage of the various expenses of a Company. Study the diagram and answer the following question.
What is the interest expense if total expenses is Rs. 25000.
Rs. 2, 500
Rs. 1, 800
Rs. 9, 000
Rs. 5, 000
Correct answer
Rs. 2, 500
A motorcycle travelled 1000 m at 36 km/hr. Find the time (in seconds) taken by the motorcycle to cover this distance.
300
100
400
200
Correct answer
300
A 4-digit number 1xy7 is divisible by 11. What is the value of x - y?
-8
-2
-4
-6
Correct answer
-8
Tap M and N can together fill a cistern in 48/13 minutes. N alone can fill it in 6 minutes. How much time will M alone take to fill the cistern?
9.6 minutes
9 minutes
9.4 minutes
8.6 minutes
Correct answer
9.6 minutes
What is the curved surface area of a hemisphere whose radius is 7 cm? (take π = 22/7)
616 cm2
154 cm2
308 cm2
924 cm2
Correct answer
616 cm2
An airplane flies at the speed of 50 m/s. How much distance (in km) will it cover in a flight of 5 hours?
895
850
880
900
Correct answer
895
What is the distance between the points (4, 3) and (3, -2)?
\(\sqrt {26} \)
\(\sqrt {24} \)
6
5
Correct answer
\(\sqrt {26} \)
sec 45° - tan 60° = ?
\( - \sqrt 3 + \sqrt 2 \)
\( - \sqrt 3 - \sqrt 2 \)
\(\frac{{\sqrt 3 }}{2}\)
\(\sqrt 3 + \sqrt 2 \)
Correct answer
\( - \sqrt 3 + \sqrt 2 \)
What is the least number which when doubled is perfectly divisible by 7, 12 and 15?
420
210
214
220
Correct answer
420
A sum of Rs. 10,000 amounts to Rs. 11, 449 in 2 years, when the interest is compounded annually. The interest rate percent per annum is:
6%
1%
7%
8%
Correct answer
6%
The ages of X and Y are in the ratio 4 : 7. Three years earlier, the ratio of their ages was 1 : 2. What is the difference between their current ages (Y - X)?
3
6
9
7.5
Correct answer
3
What is 80% of 50% of 90?
30
34
32
36
Correct answer
30
Choose the figure that is different from the rest.
Correct answer
A series is given, with one number missing. Choose the correct alternative from the given ones that will complete the series.
1.14, 1.28, 1.42, ?, 1.70, 1.84
1.56
1.54
1.68
1.62
Correct answer
1.56
Two planes E and F start flying from the same point. E flies 7 km west, then turns to its left and flies 15 km. Meanwhile F flies 11 km east and turns right and flies 15 km. Where is F with respect to E?
F is 18 km west of E
F is 4 km east of E
F is 18 km east of E
F is 4 km west of E
Correct answer
F is 18 km west of E
Given below are some letters, that each of these letters has a corresponding number. Select the combination of numbers from the option so that the jumbled letters arranged accordingly will form a meaningful English word.
H T R U O A
1 2 3 4 5 6
6, 4, 2, 1, 5, 3
3, 4, 5, 2, 1, 6
1, 6, 2, 4, 5, 3
2, 1, 5, 3, 4, 6
Correct answer
6, 4, 2, 1, 5, 3
I, J, K and L are sitting in a row. L and I are sitting next to each other and I and K are the ends. Who is sitting next to J?
Only K
L and I
K and L
Only L
Correct answer
Only K
Select the option that is related to the third term in the same way as the second term is related to the first term.
Tall : Short ∷ Glad : ?
Sad
Happy
Emotion
Smile
Correct answer
Sad
If, ‘+’ represents ‘×’, ‘-‘ represents ‘+’, ‘×’ represents ‘÷’ and ‘÷’ represents ‘-‘ then find the value of the following expression.
9 × 3 + 6 ÷ 2 = ?
20
10
12
16
Correct answer
20
If G + H means G is daughter of H, G- H means G is sister H and G * H means G is husband of H, which of the following shows that I is the daughter of H?
I – J + F * H
I + J - F * H
I – J * F + H
I * J - F + H
Correct answer
I – J + F * H
Which of the following Venn diagrams best represents the relationship between Indians, doctors and women?
Correct answer
Given below are two statement, followed by two conclusion, I and II. You have to consider the statement to be true even if they seem to be at variance from commonly known facts. You have to decide which of the given conclusions, if any, follow(s) from the given statements.
Statement 1: No quadrilaterals are polygons.
Statement 2: All polygons are rhombuses.
Conclusion I: Some rhombuses are quadrilaterals.
Conclusion II: Some rhombuses are polygons.
Neither I nor II follows
Only conclusion II follows
Only conclusion I follows
Both I and II follow
Correct answer
Neither I nor II follows
Which two signs should be interchanged to make the given equation correct?
9 ÷ 3 + 8 × 2 – 15 = 2
× and -
÷ and -
Correct answer
× and -
What is the minimum number of lines required to make the given image?
13
12
10
9
Correct answer
13
A series is give, with one term missing. Choose the correct alternative from the given ones that will complete the series.
OOOOOX, OOOOXX, OOOXXX, OOXXXX, ?
XXXXXX
OOXXXXX
OOXXXX
OXXXXX
Correct answer
XXXXXX
If C $ D means C is daughter of D, C & D means C is mother of D and C % D means C is son of D, then what does W $ X & Y % Z mean?
Z is wife of W
Z is mother of W
Z is father of W
Z is daughter of W
Correct answer
Z is wife of W
Given below is a question, followed by two arguments, I and II. You have to decide which of the given arguments, if any, is a strong argument, with respect to the question.
Question: Should advertisements be banned on television?
Argument I: Yes, advertisements are immoral.
Argument II: No, advertisements bring in revenue which helps reduce cost for viewers.
Only argument II is strong.
Only argument I is strong.
Neither I nor II is strong.
Both I and II are strong.
Correct answer
Only argument II is strong.
Select the option that is related to the third number in the same way as the second number is related to the first number.
-9/11 : 11/9 ∷ 13/2 : ?
3/7
2/13
-2/13
-7/3
Correct answer
3/7
Given below is a statement followed by two assumption numbered I and II. You have to decide which of the assumptions is/are implicit in the statement.
Statement: The human body produces Vitamin D when exposed to sunlight.
Assumption I: The human body will have Vitamin D even if it is not consumed via food.
Assumption II: A large portion of the global population suffers from Vitamin D deficiency.
Both I and II are implicit
Only assumption II is implicit
Neither I nor II is implicit
Only assumption I is implicit
Correct answer
Both I and II are implicit
A salesperson starts from his office and drives 2 km east, then turns north and drives 7 km, then turns to his right and drives 6 km, then turns south and drives 7 km. Where is he now with respect to his starting position?
8 km east
4 km west
4 km east
8 km west
Correct answer
8 km east
Unscramble the letters in the words given below and find the odd word out.
FLOW
ILNO
ERTIG
WCO
Correct answer
FLOW
Find the odd group of letters from the given alternatives.
EFG
PQR
VWX
HJL
Correct answer
EFG
Choose the figure that is different from the rest.
Correct answer
In a code language, 295 means ‘water is liquid’, 549 means ‘oil is liquid’ and 824 means ‘oil on water.’ Find the code for ‘on’.
4
2
8
5
Correct answer
4
In the following figure, square represents Chinese, triangle represents dancers, circle represents male and rectangle represents architects. Which set of letters represents dancers who are male?
DEIG
DEF
IGH
GEF
Correct answer
DEIG
The abbreviation AC in an engineering drawing stands for __________.
Across Corners
Aerial Cut
Attached Circle
Air Conditioning
Correct answer
Across Corners
Greater the value of _______ of a material, the more rapidly it will conduct heat.
melting point
latent heat
regelation
thermal conductivity
Correct answer
melting point
The effort applied to move a load is 15 units and the mechanical advantage is observed to be 3. Find the load.
5 units
3 units
15 units
45 units
Correct answer
5 units
What is the unit's digit in 366 × 641 × 753
8
3
6
7
Correct answer
8
If the width of a standard engineering drawing sheet is 841 mm, then its length would be ________ mm.
1189
1250
1000
1216
Correct answer
1189
A 200 g block of iron was heated from 30°C to 60°C. How much heat was transferred to the block (specific heat of iron is 450 Jkg-1K-1)?
6000 J
27 J
2700 J
270 J
Correct answer
6000 J
If a machine overcomes a load 'L' and the distance travelled by the load is 'Ld', the work done by the load will be __________.
L × Ld
\(\rm \frac{L}{Ld}\)
\(\rm \frac{Ld}{L}\)
\(\rm \frac{1}{L \times Ld}\)
Correct answer
L × Ld
A brass rod (thermal conductivity 109 J/s m K) has an area of cross section 0.04 m2 and length 20 cm. If the two end of the rod are maintained at a temperature difference of 200°C, the rate of heat flow through the rod is ________.
3.42 kJ/s
2.32 kJ/s
4.36 kJ/s
5.80 kJ/s
Correct answer
3.42 kJ/s
The effort in a class 1 lever is in __________ direction(s).
three
multiple
two
one
Correct answer
three
The velocity ratio of a simple machine is the ratio of distance traveled by the ________ to the distance traveled by the ________ in the machine.
load; load
effort; load
load; effort
effort; effort
Correct answer
load; load
If straight lines are drawn from various points on the contour of an object to meet a plane, the figure obtained on the plane is called the _______ of the object.
development
dimensioning
projection
animation
Correct answer
development
A _______ is a theoretical exact plane, axis or point location that GD & T or dimensional tolerances are referenced to.
flange
frame
section
datum
Correct answer
flange
Molar specific heat capacity of a substance is _________.
\(\left(\frac{1}{\mu}\right)\left( \frac{\Delta Q}{\Delta T} \right) \)
\(\mu \left( \frac{\Delta Q}{\Delta T} \right)\)
\(\left(\frac{1}{\mu}\right)\left( \frac{\Delta T}{\Delta Q} \right)\)
\(\mu \left( \frac{\Delta T}{\Delta Q} \right)\)
Correct answer
\(\left(\frac{1}{\mu}\right)\left( \frac{\Delta Q}{\Delta T} \right) \)
In engineering drawing, the letters LH signifies __________.
Level Hide
Left Hand
Low Heat
Limit of Height
Correct answer
Level Hide
Identify the material having high coefficient of volume expansion.
Brass
Alcohol
Glass
Water
Correct answer
Brass
An object starts from rest at x = 0 m and moves with a constant acceleration of 1.6 m/s2 along the x-axis. During its journey from x = 12.8 m to x = 20.0 m, its average velocity will be __________.
7.2 m/s
3.6 m/s
8.8 m/s
2.4 m/s
Correct answer
7.2 m/s
You are given a question and two statements. Identify which of the statements is/are necessary/sufficient to answer the question.
Question: What was the discount percent offered on the soap by the store?
Statements:
I) The store is giving 1 soap free on purchase of three.
II) Rs. 10 discount is offered on purchase of soap worth 36.
II alone is sufficient while I alone is not sufficient
I alone is sufficient while II alone is not sufficient
Neither I nor II is sufficient
Either I or II is sufficient
Correct answer
II alone is sufficient while I alone is not sufficient
A series resonant circuit consists of a resistor of 10 Ω, a capacitor of 1 μF and an inductor of 1 mH. What is the value of the current flowing through this circuit at resonance if the applied voltage is 100 V AC?
100 mA
1 A
10 mA
10 A
Correct answer
100 mA
What is the name of the device that have three terminals and two layers?
NPN transistor
UJT
PNP transistor
FET
Correct answer
NPN transistor
In a mixer, which control determines the amount of signal to be sent to the right or left channels?
Equaliser
Filter
PAN
Treble
Correct answer
Equaliser
In which part of a cell does oxidation take place?
Anode
Container
Electrolyte
Cathode
Correct answer
Anode
What are the speakers that handle the higher range of audio frequencies called?
Tweeters
Woofers
Box speakers
Bass speakers
Correct answer
Tweeters
______ is the input of detector stage?
IF signal
RF signal
Audio signal
carrier wave
Correct answer
IF signal
Which of the following is NOT a topology of an SMPS?
Forward converter
Reverse converter
AC to DC converter
DC to DC converter
Correct answer
Forward converter
The binary equivalent of the octal number 456 is _______.
100111101
100101110
101011110
101001101
Correct answer
100111101
The shape of the time base signal of a CRO is generally a ______.
Sine Wave
Square Wave
Triangle Wave
Sawtooth Wave
Correct answer
Sine Wave
What is the function of a shunt resistor used for extending the range of an ammeter?
To divide the additional voltage.
To increase the meter resistance.
To increase the PF.
To bypass the additional current.
Correct answer
To divide the additional voltage.
Identify the terminals in a three-point starter from the options given below.
Line, field and armature terminals
Line, NLR and armature terminals
Line, field and NLR terminals
NLR, field and armature terminals
Correct answer
Line, field and armature terminals
A CRO displays a sine waveform which spans 3 cycles in 6 horizontal divisions. If the time base switch is set to 1 ms /div, what is the frequency of this signal which is being measured?
500 Hz
50 Hz
20 Hz
200 Hz
Correct answer
500 Hz
If the ______ section in a TV has failed, the result is "No Sound, No Picture".
horizontal transistor
vertical output
sync separator
IF output
Correct answer
horizontal transistor
In a motor speed control using TRIAC and UJT, the potentiometer controls:
the thyristor gate current
the gate voltage in the thyristor circuit
the frequency of the pulses from UJT
the thyristor anode voltage
Correct answer
the thyristor gate current
In an AM with m=1, the power in one sideband is:
one-fourth of the carrier power
the same as the total power
three-fourth of the total power
one-tenth of the total power
Correct answer
one-fourth of the carrier power
Reception of a station in a wrong position is caused by ______
Defective gang condenser
Misalignment of I.F.T
Misalignment of antenna coil
Oscillator coil
Correct answer
Defective gang condenser
The wavelength of the laser used in a DVD player is ______.
820 nm
540 nm
780 nm
650 nm
Correct answer
820 nm
Which type of loss can be reduced in a transformer by increasing the diameter of the conductor?
Hysteresis loss
Magnetic loss
Copper loss
Eddy current loss
Correct answer
Hysteresis loss
The regenerative process where the collector junction temperature increases the collector current and vice versa is called _______.
temperature stability
positive feedback
oscillation
thermal runaway
Correct answer
temperature stability
Which of the following statements is TRUE in case of filters used with rectifiers?
Capacitors and inductors are both connected in series with the output.
Capacitors and inductors are both connected in shunt with the output.
Capacitors are connected in series and inductors in shunt with the output.
Capacitors are connected in shunt and inductors in series with the output.
Correct answer
Capacitors and inductors are both connected in series with the output.
In television, one half of horizontal pixels rows are refreshed in one cycle and the other half in the next cycle. This process is known as ______.
sequential scanning
alternate scanning
interlaced scanning
differential scanning
Correct answer
sequential scanning
Which one of the following is referred to as a free one-shot circuit?
Schmitt trigger
Monostable
Astable multivibrator
Bistable multivibrator
Correct answer
Schmitt trigger
Why crystal receiver has poor selectivity?
No loud speaker is used
No battery is used
it has long antenna
No tuned circuit is used
Correct answer
No loud speaker is used
______ coupling is a way to provide impedance matching in the AF amplifiers.
Resistive
RC
Direct
Transformer
Correct answer
Resistive
In Silicon Controlled Rectifier (SCR):
holding current > latching current
holding current < latching current
holding current = latching current
holding current = 0.6 V/ forward resistance
Correct answer
holding current > latching current
One of the criteria for oscillations to occur in an amplifier is that:
the amplifier must have a variable power supply
the loop gain must be slightly greater than unity
the amplifier must be in the cut-off state
the amplifier output impedance must be zero
Correct answer
the amplifier must have a variable power supply
The basic components of an optocoupler are _______.
LED and phototransistor
LED and LDR
crystal and LDR
photodiode and crystal
Correct answer
LED and phototransistor
If the height of an antenna increases, the angle of radiation ______
Increases
Becomes a zero
Does not change
Decreases
Correct answer
Increases
In a transistor, identify the terminal with the highest doping from the options given below.
Intrinsic zone
Emitter
Collector
Base
Correct answer
Intrinsic zone
If a receiver is able to detect and amplify even very weak signals, its _______ considered to be very good.
fidelity
selectivity
bandwidth
sensitivity
Correct answer
fidelity
When two resistors of equal value are connected across a 220 V DC supply, the current through each resistor is 1 A. Find the colour code of the resistors.
Brown, Black, Red
Red, Red, Red
Black, Brown, Red
Red, Red, Brown
Correct answer
Brown, Black, Red
According to Kirchoff's current law,:
the sum of the currents entering a node = the sum of the currents leaving the node
the sum of the potential differences across all elements = 0
the total current is directly proportional to the applied voltage
the sum total of all the currents in a loop = 0
Correct answer
the sum of the currents entering a node = the sum of the currents leaving the node
Which of the following is NOT a type of wireless communication technology?
Satellite communication
OFC communication
Bluetooth communication
Infrared communication
Correct answer
Satellite communication
A discriminator is basically a ______.
Wein bridge oscillator
AM modulator
FM detector
RS flip flop
Correct answer
Wein bridge oscillator
In wave propagation, fading refers to:
the reduction in signal strength
the changing of the colour
the shifting of frequency
the changing of the wavelength
Correct answer
the reduction in signal strength
The bandwidth of a TV channel in India is ______.
7 MHz
10.8 MHz
5.5 MHz
15 MHz
Correct answer
7 MHz
A bridge rectifier receives its input from a 4 ∶ 1 step down transformer connected 220 V AC. Identify the PIV of the bridge rectifier from the given options.
55 V
141.4 V
77.7 V
63.6 V
Correct answer
55 V
TV remote controls commonly use _______ to communicate with the TV.
a laser diode
Bluetooth transmitter
Infrared LED
UV transmitter
Correct answer
a laser diode
AM broadcast transmits ______
Carrier and lower side band
Only side bands
Only carrier
Both side bands and carrier
Correct answer
Carrier and lower side band
Two amplifiers each of gain 10 and 25 are cascaded. If the input voltage to the first amplifier is 10 mV, the output of the second stage will be _______.
25 V
2.5 V
125 V
100 V
Correct answer
25 V
The geostationary orbit is _______ km away from the surface of the earth.
36,000
2,950
38,000
2,200
Correct answer
36,000
The conductive coating on the outer surface of a picture tube is called ______.
metal primer
liquid conductor
Aquadag
enamel
Correct answer
metal primer
A DVD uses the ______ method to store and read data.
optical
electrical
magnetic
Hall effect
Correct answer
optical
Why FM is popular compared to the AM ______.
Easier to generate and detect
Requires simple transmission and reception equipment's
Less sensitivity to noise
Occupies less band width
Correct answer
Easier to generate and detect
______ is used to describe information about the hue and saturation of a colour.
Chrominance
Luminance
Contrast
Intensity
Correct answer
Chrominance
In a common-anode seven-segment display, what will be displayed if all the seven data inputs are at logic "0"?
8
2
4
0
Correct answer
8
What is the full form of DTS?
Digital Transmission Systems Format for Video
Digital Theatre Systems Format for Video
Digital Theatre Systems Format for Audio
Direct Transmission for Satellite Services
Correct answer
Digital Transmission Systems Format for Video
Which of the following input conditions of an SR flip flop will result in an SET condition at the output?
R = 0, S = 0
R = 1, S = 0
R = 0, S = 1
R = 1, S = 1
Correct answer
R = 0, S = 0
Which stage in an AM transmitter is also known as Harmonic Generator?
Power amplifier
Carrier oscillator
Frequency multiplier
AFC circuit
Correct answer
Power amplifier
In satellite communication, the downlink frequency is always _______ the uplink frequency.
equal to
independent of
higher than
lower than
Correct answer
equal to
The value of the first IF in double conversion FM Radio receivers is ______.
108 MHz
10.7 MHz
470 kHz
455 kHz
Correct answer
108 MHz
When a transistor is biased such that its Base current is greater than zero and its collector-to-emitter voltage is less than 0.2 V, it is operating in the ______ region.
cut-off
active
breakdown
saturation
Correct answer
cut-off
In a PA system, a ______ is used to adjust the amplitude of different frequencies to achieve the desired quality of sound output.
amplifier
filter
attenuator
equalizer
Correct answer
amplifier
______ electrons flow every second in ten amperes of current.
31.4 × 108
62.4 × 108
31.4 × 1018
62.4 × 1018
Correct answer
31.4 × 108
A 3.1 sound system has _______.
3 speakers and one tweeter
only 3 speakers
bass, treble, and speaker
3 speakers and one subwoofer
Correct answer
3 speakers and one tweeter
In an AM radio receiver, for an RF signal of 1545 kHz, the value of the local oscillator frequency will be ______.
2,000 kHz
455 kHz
1,455 kHz
2,455 kHz
Correct answer
2,000 kHz
The band width of an A.M radio receiver?
10 KHz
1 KHz
5 MHz
20 KHz
Correct answer
10 KHz
An ideal 220 VA step-down transformer is connected to a 220 V supply in the primary. If its turns ratio is 4 ∶ 1, then the value of the secondary current will be ______.
11 A
4 A
22 A
1 A
Correct answer
11 A
What is a wave trap?
Low pass filter
High pass filter
Wide band amplifier
Resonance circuit
Correct answer
Low pass filter
In a direct-coupled amplifier, the gain falls at high frequencies mainly due to ______.
Stray capacitances
Filtering issues
Coupling capacitors
Power supply
Correct answer
Stray capacitances
Which of the following quantities is the same for the primary and secondary of a transformer?
Voltage
Phase
Frequency
Current
Correct answer
Voltage
Which component in a TV is responsible for generating the high voltage sawtooth signals at a relatively high frequency?
Fly back transformer
UPS transformer
SMPS transformer
Isolation transformer
Correct answer
Fly back transformer
When simplified, the Boolean expression A + AB results in ______.
B
A + 1
AB
A
Correct answer
B
In an Op-Amp voltage regulator, the regulating element is connected:
in series with the load
in series with the Zener diode
across the Zener diode
across the load
Correct answer
in series with the load
What will happen to the output voltage in a series regulator, when temperature increases?
Equals input voltage
Increases
Decreases
Remain constant
Correct answer
Equals input voltage
In a microprocessor, which is the register that always holds the result of an operation?
Instruction register
Accumulator
Buffer
Data bus
Correct answer
Instruction register
Identify the features of CC configuration from the options given below.
Highest input impedance and highest current gain.
Highest input impedance and highest voltage gain.
Lowest input impedance and lowest voltage gain.
Lowest input impedance and highest voltage gain.
Correct answer
Highest input impedance and highest current gain.
Which one of the following does NOT affect the value of the capacitance of a parallel plate capacitor?
Distance between the plates
Voltage applied to the capacitor
Surface area of the plates
Permittivity of the dielectric used
Correct answer
Distance between the plates
In an FM radio receiver, which section uses the limiter circuit at its input?
AGC
Detector
AF amplifier
Mixer
Correct answer
AGC
Which of the following types of microphone requires an external power source to operate?
Condenser microphone
Paper microphone
Dynamic microphone
Ribbon microphone
Correct answer
Condenser microphone
When the communication allows simultaneous talking and listening by two parties over the same channel, it is called ______.
full duplex
simplex
biplex
half duplex
Correct answer
full duplex
______ is the digital 2-input logic gate whose output is HIGH only when both its inputs are the same.
EX OR Gate
EX NOR Gate
AND gate
NAND Gate
Correct answer
EX OR Gate
Which type of memory needs to be regularly refreshed?
DRAM
ROM
SRAM
CMOS
Correct answer
DRAM
The IC CA810 can be used as power amplifier in many applications. Which is the circuit this IC cannot be used?
Radio receiver and tape recorders
Television receivers
Small PA systems
Power driving circuits
Correct answer
Radio receiver and tape recorders
175 questions in the full paper