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Table of Contents
Jharkhand Polytechnic Previous Years Question Papers
Question 2: The main source of aromatic compounds is
Fruit
Winter green oil
Petroleum
Ant
Answer: 3
Question 3: The slow chemical process of making coal from wood is called:
decomposition
oxidation
Distillation
Carbonization
Answer: 1
Question 4: If the ratio of the second and third term in the expansion of (a + b)2 is equal to the ratio of the third and fourth term in the expansion of (a + b ) n+3 then the value of n is equal to :
8
7
5
3
Answer: 3
Question 5: The equation of line which is parallel to the straight line 3x + 4y – 7 = 0 and passing through (1,2) is :
3x + 4y = 11
3x+4y+11= 0
4x-3y+2=0
3x+4y+7=0
Answer: 4x-3y+2=0
Question 6: A dice is thrown then the probability that the sum of the number is 1 or 6 is:
1/5
1/3
2/5
3/4
Answer: 1/3
Question 7: The sum of 20 terms of the series 1 + 4 + 7 + 10 +….is:
290
490
590
none of these
Answer: 590
Question 8: Which is correct for inside charged sphere?
E ≠ 0, V = 0
E=0, V= 0
E≠0, V≠0
E=0, V = 0
Answer: E=0, V = 0
Question 9: The function of a grid in a triode is:
to increase plate voltage
to decrease plate voltage
reduce the effect of space charge
None
Answer: to increase plate voltage
Question 10: The wavelengths associated with photons and electrons are the same, the ratio of their momentum will be:
1: 1
2: 1
1: 4
3: 2
Answer: 1
Question 11: Of which the velocity is equal to light velocity:
Cathode ray
X-rays
positive ray
all
Answer: X-rays
Question 12: If the pressure of a gas is doubled at a constant temperature, then the velocity of sound in the gas becomes:
unchanged
√2 times
half
double
Answer: unchanged
Question 13: Which quantity doesn’t remain constant in simple harmonic motion:
Time period
velocity
frequency
amplitude
Answer: velocity
Question 14: Brasses and bronzes are welded using
carburising flame
oxidizing flames
reducing flame
neutral flame
Answer: 4
Question 15: In a certain store, the profit is 320% of the cost. If the cost increases by 25% but the selling price remains constant, approximately what percentage of the selling price is the profit?
30%
70%
100%
250%
Answer: 2
Question 16: A shopkeeper expects a gain of 22.5% on his cost price. If in a week, his sale was of Rs. 392, what was his profit?
18.20
70
72
88.25
Answer: 3
Question 17: On selling 17 balls at Rs. 720, there is a loss equal to the cost price of 5 balls. The cost price of a ball is:
45
50
55
60
Answer: 4
Question 18: The main chemical constituent of clay is
silicon oxide
aluminium borosilicate
zeolites
aluminium silicate
Answer: 4
Question 19: The percentage profit earned by selling an article for Rs. 1920 is equal to the percentage loss incurred by selling the same article for Rs. 1280. At what price should the article be sold to make 25% profit?
2000
2200
2400
Data inadequate
Answer: 3
Question 20: Supersonic plane fly with the speed
less than the speed of sound
of sound
greater than the speed of sound
of light
Answer: 3
Question 21: Rainbow is due to
absorption of sunlight in minute water droplets
diffusion of sunlight through water droplets
ionisation of water deposits
refraction and reflection of sunlight by water droplets
Answer: 4
Question 22: Stars that appear single to the naked eye but are double when seen through a telescope are
novas and supernovas
binaries
asteroids
quasars
Answer: 2
Question 23: The hardest form of carbon is
coke
graphite
diamond
charcoal
Answer: 3
Question 24: The main active constituent of tea and coffee is
nicotine
chlorophyll
caffeine
aspirin
Answer: 3
Question 25: How does the size of the pupil become in strong light?
(A) Big
(B) Small
(C) No change
(D) None of these
Answer: Option (B)
Question26: Kilowatt-hour is the unit of?
(A) Electricity of charge
(B) Energy
(C) Potential difference electricity
(D) Power
Answer: Option (B)
Question27: The glasses of a person with nearsightedness are put in?
(A) Convex lens
(B) Cylindrical lens
(C) Bifocal lens
(D) Concave lens
Answer: Option (D)
Question28: What is in the human eye?
(A) Concave lens
(B) Convex mirror
(C) Convex lens
(D) Concave mirror
Answer: Option (C)
Question29: What is the filament of an electric bulb?
(A) Copper
(B) Platinum
(C) Tungsten
(D) None of these
Answer: Option (C)
Question30: The part of the eye on which the image of an object falls, is called?
(A) Cornea
(B) Retina
(C) Iris
(D) Pupil
Answer: Option (B)
Question31: Which color is visible at the time of sunrise and sunset?
(A) Red
(B) Blue
(C) Black
(D) Yellow
Answer: Option (A)
Question32: What is the SI unit of a magnetic field?
(A) Newton
(B) Tesla
(C) Ampere
(D) Meter
Answer: Option (B)
Question33: What type of current is received from the dynamo?
(A) Direct section
(B) Alternating Current
(C) Both Sections
(D) None of these
Answer: Option (A)
Question34: What is the unit of resistivity?
(A) Ohm/meter
(B) Ohm-meter
(C) Meter
(D) None of these
Answer: Option (B)
Question35: The device for generating electric current is called?
(A) Ammeter
(B) Galvanometer
(C) Generator
(D) Meter
Answer: Option (C)
Question36: The glasses of a person with long-sightedness are fitted in?
(A) Concave lens
(B) Bifocal lens
(C) Convex lens
(D) Cylindrical lens
Answer: Option (C)
Question37: The point in the human eye which is not at all sensitive to light is called?
(A) Pit point
(B) Blind Point
(C) Near Point
(D) Far Point
Answer: Option (B)
Question38: What type of image is formed on a cinema screen?
(A) Virtual image
(B) Real image
(C) Both
(D) All the statements are true
Answer: Option (B)
Question39: What type of spectrum is a rainbow?
(A) Natural spectrum
(B) Artificial spectrum
(C) Artificial spectrum and natural spectrum
(D) All the statements are true
Answer: Option (A)
Question40: What does the color of the sky look like when traveling in an aircraft at high altitude?
(A) Red
(B) Black
(C) Yellow
(D) Blue
Answer: Option (B)
Question41: The far point of the normal human eye is?
(A) at 25 cm
(B) at 25 m
(C) at 25 mm
(D) at infinity
Answer: Option (D)
Question42: Which color is used in the danger signal?
(A) Yellow color
(B) Violet color
(C) Blue color
(D) Red color
Answer: Option (D)
Question43: What is the approximate time difference between the actual sunset and the virtual sunset?
(A) 2 minutes
(B) 1 minute
(C) 4 minutes
(D) 3 minutes
Answer: Option (A)
Question44: Eyes with farsightedness can clearly see?
(A) Nearby objects
(B) Big things
(C) Distant objects
(D) None of these
Answer: Option (C)
Question45: In how many different ways can the letters of the word ‘CORPORATION’ be arranged so that the vowels always come together?
810
1440
2880
50400
5760
Answer: Option 4
Question46: Six bells commence tolling together and toll at intervals of 2, 4, 6, 8 10, and 12 seconds respectively. In 30 minutes, how many times do they toll together?
4
10
15
16
Answer: Option 4
Question47: If 3(x – y) = 27 and 3(x + y) = 243, then x is equal to:
0
2
4
6
Answer: Option 3
Question48: A man has Rs. 480 in the denominations of one-rupee notes, five-rupee notes and ten-rupee notes. The number of notes of each denomination is equal. What is the total number of notes that he has?
45
60
75
90
Answer: Option 4
Question49: The higher the wind speed and the longer the fetch or distance of open water across which the wind blows and waves travel, the ____ waves and the ____ energy they process.
larger, more
larger, less
smaller, more
smaller, less
Answer: Option 1
Question50: What did J. B. Dunlop invent?
Pneumatic rubber tire
Automobile wheel rim
Rubber boot
Model airplanes
Answer: Option 1
Question51: Number of moles of MnO4- required to oxidize one mole of ferrous oxalate completely in the acidic medium will be
2 moles
6 moles
4 moles
5 moles
Answer: Option 2
Question52: Radiocarbon is produced in the atmosphere as a result of
collision between fast neutrons and nitrogen nuclei present in the atmosphere
action of ultraviolet light from the sun on atmospheric oxygen
action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere
lightning discharge in atmosphere
Answer: Option 1
Question53: Nuclear sizes are expressed in a unit named
Fermi
angstrom
newton
tesla
Answer: Option 1
Question54: Lux is the SI unit of
intensity of illumination
luminous efficiency
luminous flux
luminous intensity
Answer: Option 1
Question55: Point A is at a lower electrical potential than point B. An electron between them on the line joining them will
move towards A
move towards B
move at right angles to the line joining A and B
remain at rest
Answer: Option 2
Question56: The high reactivity of fluorine is due to
its high electro negativity
small size of fluorine atom
availability of d-orbitals
strong F – F bond
Answer: Option 1
Question57: The iron ore magnetite consists of
Fe2O3
Fe3OH4
FeCO3
3H2O
Answer: Option 1
Question58: The main chemical constituent of clay is
silicon oxide
aluminium borosilicate
zeolites
aluminium silicate
Answer: Option 4
Question59: The main use of salt in the diet is to
make the taste of food better
produce in small amounts the hydrochloric acid required for the digestion of food
ease the process of cooking
increase the solubility of food particles in water
Answer: Option 2
Question60: In a certain store, the profit is 320% of the cost. If the cost increases by 25% but the selling price remains constant, approximately what percentage of the selling price is the profit?
30%
70%
100%
250%
Answer: Option 2
Question61: A, B, C subscribes Rs. 50,000 for a business. A subscribes Rs. 4000 more than B and B Rs. 5000 more than C. Out of a total profit of Rs. 35,000, A receives:
8400
11,900
13,600
14,700
Answer: Option 4
Question62: The equation of parabola which passes through the intersection of a straight line x + y = 0 and the circle x2 + y2 + 4y = 0 is:
y2 = 4x
y2 = x
y2 = 2x
none of these
Answer: Option 3
Question63: Sin A. Sin B, Cos A are in GP, Roots of x2 + 2 x cot B + 1 = 0 are always:
real
imaginary
greater than 1
equal
Answer: Option 1
Question64: A transmission line has a characteristic impedance of 50 Ω and a resistance of 0.1Ω/m, if the line is distortionless, the attenuation constant (in Np/m) is
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