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Polytechnic Entrance Practice Test

Polytechnic Entrance Examination 2016  questions answers are applicable for any kind of Polytechnic Entrance preparation in India like TS POLYCET. You can practice as much as you can to gather knowledge of how to answers Polytechnic Entrance critical type papers in short time and this can be a big factor for cracking all india level exam.

For more resources you can go through Polytechnic Entrance Previous Year Question Papers Answers.

Polytechnic Entrance Question Answers - Physics

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Question 1
An electron is
A
a hadron
B
a baryon
C
a nucleon
D
a lepton
Question 2
Minority carriers in a p -type semiconductor are
A
free electrons
B
holes
C
neither holes nor free electrons
D
both holes and free electrons
Question 3
The twinkling effect of star light is due to:
A
total internal reflection
B
high dense matter of star
C
constant burning of hydrogen in the star
D
the fluctuating apparent position of the star being slightly different from the actual position of the star
Question 4
The width of the diffraction band varies:
A
inversely as the wavelength
B
directly as the width of the slit
C
directly as the distance between the slit and the screen
D
inversely as the size of the source from which the slit is illuminated
Question 5
When a low flying aircraft passes over head, we sometimes notice a slight shaking of the picture on our TV screen. This is due to:
A
diffraction of the signal received from the antenna
B
interference of the direct signal received by the antenna with the weak signal reflected by the passing aircraft
C
change of magnetic flux occurring due to the passage of aircraft
D
vibration created by the passage of aircraft
Question 6
A beam of light of wavelength 600 nm from a distant source falls on a single slit I mm wide and the resulting diffraction pattern is observed on a screen 2 m away. The distance between the lust dark fringes on either side of the central bright fringe is:
A
1.2 cm
B
1.2 mm
C
2.4 cm
D
2.4 mm
Question 7
A battery of emf 10 V and internal resistance 3 Ω is connected to a resistor. The current in the circuit is 0.5 A. The terminal voltage of the battery when the circuit is closed is
A
10 V
B
0 V
C
1.5 V
D
8.5 V
Question 8
A galvanometer coil has a resistance of 15 and gives full scale deflection for a current of 4 mA. To convert it to an ammeter of range 0 to 6 A:
A
10 m Ω resistance is to be connected in parallel to the galvanometer
B
10 m Ω resistance is to be connected in series with the galvanometer
C
0.1 Ω resistance is to be connected in parallel to the galvanometer
D
0.1 Ω resistance is to be connected in series with the galvanometer
Question 9
The electron drift speed is small and the charge of the electron is also small but still, we obtain large current in a conductor, This is due to:
A
the conducting property of the conductor
B
the resistance of the conductor is small
C
the electron number density of the conductor is small
D
the electron number density of the conductor is enormous
Question 10
When light of wavelength 300 nm falls on a photoelectric emitter, photo electrons are liberated. For another emitter, light of wavelength 600 nm is sufficient for liberating photo electrons. The ratio of the work function of the two emitters is
A
1:2
B
2:1
C
4:1
D
1:4
Question 11
White light is passed through a dilute solution of potassium permanganate. The spectrum produced by the emergent light is
A
band emission spectrum
B
line emission spectrum
C
band absorption spectrum
D
line absorption spectrum
Question 12
A Gaussian sphere encloses an electric dipole within it. The total flux across the sphere is
A
zero
B
half that due to a single charge
C
double that due to a single charge
D
dependent on the position of the dipole
Question 13
For a given tens, the magnification was found to be twice as large as when the object was 0.15 m distant from it as when the distance was 0.2 m. The focal length of the lens is
A
15 m
B
0.20 m
C
0.10 m
D
0.05 m
Question 14
To a fish under water, viewing obliquely a fisherman standing on the bank of a lake, the man looks:
A
taller than what he actually is
B
shorter that what he actually is
C
the same height as he actually is
D
depends on the obliquity
Question 15
The working of which of the following is similar to that of a slide projector?
A
Electron microscope
B
Scanning electron microscope
C
Transmission electron microscope
D
Atomic force microscope
Question 16
In a transistor the collector current is always less than the emitter current because
A
collector side is reverse biased and the emitter side is forward biased
B
a few electrons are lost in the base and only remaining ones reach the collector
C
collector being reverse biased, attracts less electrons
D
collector side is forward biased and emitter side is reverse biased
Question 17
A transparent cube of 0.21 m edge contains a small air bubble. Its apparent distance when viewed through one face of the Cube is 0.10 m and when viewed from the opposite face is 0.04 m. The actual distance of the bubble from the second face of the cube is
A
0.06 m
B
0.17 m
C
0.05 m
D
0.04 m
Question 18
The freezer in a refrigerator is located at the top section so that
A
the entire chamber of the refrigerator is cooled quickly due to convection
B
the motor is not heated
C
the heat gained from the environment is high
D
the heat gained from the environment is low
Question 19
A tuning fork A produces 4 beats/s with another tuning fork B of frequency 320 Hz. On filing one of the prongs of A,4 heats/s are again heard when sounded with the same fork B. Then, the frequency of the fork A before filing is:
A
328 Hz
B
316 Hz
C
324 Hz
D
320 Hz
Question 20
The sprinkling of water reduces slightly the temperature of a closed room because
A
temperature of water is less than that of the room
B
specific heat of water is high
C
water has large latent heat of vaporisation
D
water is a bad conductor of heat
Question 21
When deuterium and helium are subjected to an accelerating field simultaneously then
A
both acquire same energy
B
deuterium accelerates faster
C
helium accelerates faster
D
neither of them is accelerated
Question 22
The loudness and pitch of a sound note depends on:
A
intensity and frequency
B
frequency and number of harmonics
C
intensity and velocity
D
frequency and velocity
Question 23
A choke is preferred to a resistance for limiting current in AC circuit because
A
choke is cheap
B
there is no wastage of power
C
choke is compact in size
D
choke is a good absorber of heat
Question 24
A rectangular vessel when full of water, takes 10 mm to be emptied through an orifice in its bottom. How much time will it take to be emptied when half filled with water?
A
9 mm
B
7 mm
C
5 mm
D
3 mm
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Polytechnic Entrance Question Answers - Chemistry

Congratulations - you have completed Polytechnic Entrance Question Answers - Chemistry .You scored %%SCORE%% out of %%TOTAL%%.Your performance has been rated as %%RATING%%
Your answers are highlighted below.
Question 1
The amino acid which is not optically active is
A
lactic acid
B
serine
C
alanine
D
glycine
Question 2
For a stable molecule the value of bond order must be
A
there is no relationship between stability and bond order
B
zero
C
positive
D
negative
Question 3
In acetylene molecule, between the Carbone atoms there are
A
three p1 bonds
B
one sigma and two pi bonds
C
two sigma and one pi bonds
D
three sigma bonds
Question 4
Which of the following is an intensive property?
A
Temperature
B
viscosity
C
surface tension
D
all of these
Question 5
Hofmann’s bromamide reaction is to convert
A
acid to alcohol
B
alcohol to acid
C
amide to amine
D
amine to amide
Question 6
Denatured alcohol is
A
ethanol + methanol
B
rectified spirit + methanol + naphtha
C
undistilled ethanol
D
rectified spirit
Question 7
During the formation of a chemical bond
A
electron-electron repulsion becomes
B
more than the nucleus-electron attraction
C
energy of the system does not change
D
energy increases
E
energy decreases
Question 8
How many chiral carbon atoms are present in 2, 3, 4-trichioropentanc?
A
4
B
1
C
2
D
3
Question 9
Acidified sodium fusion extract on addition of ferric chloride solution gives blood red colouration which confirms the presence of
A
S and Cl
B
N and S
C
N
D
S
Question 10
Molarity of a given orthophosphoric acid solution is 3 M. Its normality is
A
9 N
B
0.3 N
C
3 N
D
1 N
Question 11
Paracetamol is a/an
A
antipyretic
B
analgesic
C
both (a) and (b)
D
antimalarial
Question 12
Which one of the following has maximum number of atoms of oxygen?
A
2 g of carbon monoxide
B
2 g of carbon dioxide
C
2 g of sulphur dioxide
D
2 g of water
Question 13
Graphite is a soft solid lubricant extremely dilficult to melt. The reason for this anomalous behaviour is that graphite
A
is an allotropic form of carbon
B
is a non-crystalline substance
C
plates of rings of strongly bond carbon atoms with weak interpolate bonds
D
has molecules o variable molecular masses like polymers
Question 14
When KBr is dissolved in water, K+ ions are
A
hydrated
B
hydrolysed
C
reduced
D
oxidised
Question 15
When a sulphur sol is evaporated sulphur is obtained. On mixing with water sulphur sol is not formed. The sol is
A
lyophilic
B
reversible
C
hydrophobic
D
hydrophilic
Question 16
An alkyl halide reacts with alcoholic ammonia in a sealed tube, the product formed will be
A
a primary amine
B
a secondary amine
C
a tertiary amine
D
a mixture of all the three
Question 17
When conc. H2SO4 is heated with P2O5, the acid is converted into
A
sulphur trioxide
B
sulphur dioxide
C
sulphur
D
a mixture of sulphur dioxide and sulphur trioxide
Question 18
Entropy of the universe is
A
constant
B
zero
C
continuously decreasing
D
continuously increasing
Question 19
Identity the ore not containing iron.
A
limonite
B
siderite
C
carnallite
D
chalcopyrite’s
Question 20
In which of the following process, maximum increase in entropy is observed?
A
Melting of ice
B
Sublimation of naphthalene
C
Condensation o water
D
Dissolution of salt in water
Question 21
Which of the following is not an ore of magnesium?
A
Carnallite
B
Dolomite
C
Calamine
D
Sea water
Question 22
Among the alkali metals cesium is the most reactive because
A
its incomplete shell is nearest to the nucleus
B
it has a single electron in the valence shell
C
it is the heaviest alkali metal
D
the outermost electron is more loosely bound than the outermost electron of the other alkali metals
Question 23
Liquor ammonia bottles are opened only after cooling. This is because
A
it is a mild explosive
B
it is a corrosive liquid
C
it is a lachrymatory
D
it generates high vapour pressure
Question 24
A transition metal ion exists in its highest oxidation state. It is expected to behave as
A
a chelating agent
B
a central metal in a coordination compound
C
an oxidising agent
D
a reducing agent
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