# UP Polytechnic Entrance Exam Previous Papers Download

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Q-1). If the ratio of the second and third term in the expansion of (a + b)2 is equal to the ratio of third and fourth term in the expansion of (a + b ) n+3 then the value of n is equal to :

a) 6

b) 4

c) 5

d) 3

Ans-) 3

Q-2). The equation of line which is parallel to the straight line 3x + 4y – 7 = 0 and passing through (1,2) is :

a) 3x + 4y = 11

b) 3x+4y+11= 0

c) 4x-3y+2=0

d) 3x+4y+7=0

Ans-) 4x-3y+2=0

Q-3). A dice is thrown then the probability that the sum of the number is 1 or 6 is:

a) 1/6

b) 1/3

c) 2/3

d) 3/4

Ans-) 1/3

Q-4). The sum of 20 terms of the series 1 + 4 + 7 + 10 +….is:

a) 290

b) 490

c) 590

d) none of these

Ans-) 590

Q-5). Which is correct for inside charged sphere?

a) E ≠ 0, V = 0

b) E=0, V= 0

c) E≠0, V≠0

d) E=0, V = 0

Ans-) E=0, V = 0

Q-6). Function of a grid in a triode is :

a) to increase plate voltage

b) to decrease plate voltage

c) reduce the effect of space charge

d) None

Ans-) to increase plate voltage

Q-7). The wavelengths associated with photons and electron are same, the ratio of their momentum will be:

a) 1: 1

b) 2: 1

c) 1: 3

d) 3: 1

Ans-) 1: 1

Q-8). Of which the velocity is equal to light velocity:

a) Cathode ray

b) X-rays

c) positive ray

d) all

Ans-) X-rays

Q-9). If the pressure of a gas is doubled at constant temperature, then the velocity of Sound in the gas becomes:

a) unchanged

b) √2 times

c) half

d) double

Ans-) unchanged

Q-10). Which quantity doesn’t remains constant in simple harmonic motion:

a) Time period

b) velocity

c) frequency

d) amplitude

Ans-) velocity

Q-11). The momentum correction factor (β) for the viscous flow through a circular pipe is

a) 1.25

b) 1.33

c) 1.50

d) 1.66

e) 2.00

Ans-) B

Q-12).A piezometer opening in pipes measures

a) velocity head

b) static pressure

c) total pressure

d) negative static pressure.

Ans-)B

Q-13).An independent mass of a fluid does not posses

a) elevation energy

b) kinetic energy

c) pressure energy

d) none of these.

Ans-) C

Q-14). A short tube mouthpiece will not run full at its outlet if the head under which the orifice works, is

a) less than 12.2 m of the water

b) more than 12.2 m of the water

c) equal of 12.2 m of water

d) none of these.

Ans-) B

Q-15). Hydrostatic pressure on a dam depends upon its

a) length

b) depth

c) shape

d) material

e) both (b) and (c)

Ans-) E

Q-16).When two layers of a fluid separated by dy move over the other with a difference of velocity dv, causes a shearing stress , where μ is known as

a) coefficient of viscosity

b) absolute viscosity

c) dynamic viscosity

d) viscosity

e) all the above.

Ans-) E

Q-17).A pipe of 0.1 m2 cross sectional area suddenly enlarges to 0.3 m2 cross-sectional area. If the discharge of the pipe is 0.3 m3 /sec, the head loss is

a) 2/g m of water

b) g/2 m of water

c) 1g m of water

d) g m of water.

Ans-) A

Q-18).Maximum efficiency of transmission of power through a pipe, is

a) 25%

b) 33.3%

c) 50%

d) 66.67%.

Ans-) D

Q-19).An ideal flow of a liquid obeys

a) Continuity equation

b) Newton’s law of viscosity

c) Newton’s second law of motion

d) dynamic viscosity law,

Ans-) A

Q-20). Reynold number is the ratio of initial force and

a) viscosity

b) elasticity

c) gravitational force

d) surface tension.

Ans-) A