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Browse complete papersThe commonly used regenerator in Zeolite process is:
Dil. HCl
Dil. NaOH
Dil. \( \text{H}{2}\text{SO}{4} \)
NaCl
Correct answer
Dil. HCl
Consider a flywheel of mass 10 kg, uniform thickness 15 mm, and radius 100 mm. If it rotates at 300 RPM, then the KE of the flywheel (in Joules) is:
30.46
24.65
35.06
32.54
Correct answer
30.46
A long straight conductor carries a current of 5 A. The magnitude of the magnetic field at a point 20 cm from the conductor is:
\( 50 \mu T \)
\( 500 \mu T \)
\( 5 \mu T \)
\( 0.5 \mu T \)
Correct answer
\( 50 \mu T \)
Which of the following is NOT a type of wet corrosion?
Pitting corrosion
Soil corrosion
Liquid metal corrosion
Galvanic corrosion
Correct answer
Pitting corrosion
The equation of a straight line that passes through the point \( (2, -5) \) and perpendicular to the line \( 4x - y = 1 \) is:
\( x - 4y - 18 = 0 \)
\( 4x + 3y - 9 = 0 \)
\( x + 4y + 18 = 0 \)
\( 4x - y + 18 = 0 \)
Correct answer
\( x - 4y - 18 = 0 \)
A convex lens has a 30 cm focal length in air. The focal length of the same convex lens in medium A is (given that the refractive index of air-medium A = 1.4, the refractive index for air-glass = 1.5):
0.11 m
0.21 m
1.1 m
2.1 m
Correct answer
0.11 m
Capacitors connected in series behave like:
Galvanometer
Resistors connected in series
Resistors connected in parallel
N identical resistors connected in series
Correct answer
Galvanometer
Consider a material A has volume expansion coefficient \( \alpha_v = 3.9 \times 10^{-4}/^\circ C \). The linear expansion coefficient \( \alpha_l \) of the material A is:
\( 10^{-4}/^\circ C \)
\( 3.9 \times 10^{-4}/^\circ C \)
\( 2.6 \times 10^{-4}/^\circ C \)
\( 1.3 \times 10^{-4}/^\circ C \)
Correct answer
\( 10^{-4}/^\circ C \)
If the system of linear equations \( x + 2y - z = 0, 3x + (k + 7)y - 3z = 0, 2x + 4y + (k - 3)z = 0 \) has a non-trivial solution, then the value of \( k \) is:
1
\( \pm 1 \)
0
-1
Correct answer
1
Consider two forces \( \vec{A} \) and \( \vec{B} \) of magnitudes A and B and their resultant force \( \vec{R} \) has magnitude R. If the B is doubled, then R is also doubled. Similarly, if B is reversed, then also R is doubled. Then the ratio A : B : R is:
\( \sqrt{2} : 1 : \sqrt{3} \)
\( 2 : 3 : 2 \)
\( 2 : 1 : 3 \)
\( \sqrt{2} : \sqrt{3} : \sqrt{2} \)
Correct answer
\( \sqrt{2} : 1 : \sqrt{3} \)