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Directions to Solve
In each question below is given a statement followed by two assumptions numbered I and II. You have to consider the statement and the following assumptions and decide which of the assumptions is implicit in the statement.
Give answer
- (A) If only assumption I is implicit
- (B) If only assumption II is implicit
- (C) If either I or II is implicit
- (D) If neither I nor II is implicit
- (E) If both I and II are implicit.
A
Only assumption I is implicit
B
Both I and II are implicit
C
Either I or II is implicit
D
Neither I nor II is implicit
E
Only assumption II is implicit
ANS:A -
Only assumption I is implicit
Explanation:
The statement mentions that the routes have been so changed as to make them economically viable. This means that new stoppages have been so selected as to cater to a larger number of people than before. So, I is implicit. Further, the people already travelling by these buses would not be devoid of the same and they would also get the facility in their vicinity, be it the same bus or another one. So, II is not implicit.
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ANS:C -
1.885 m/sec
Displacement = Amplitude x sin(angular frequency x time).
y = Asin(ωt) where y = displacement, A = amplitude,
ω = angular frequency, t = time.
Velocity v = ωAsin(ωt).
and,
v(max)= Aω,
Where ω = 2πf,
f= frequency.
ω = 2*3.14*2 = 12.56.
Therefore, v = 0.15*12.56 = 1.884.
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B Incorrect CMOS settings
E
CDROM drive not installed
ANS:B - Incorrect CMOS settings
No answer description is available.
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ANS:C - N2
In a stirred tank reactor, when the power number becomes constant at high Reynolds numbers, the variation of power input with impeller rotational speed NNN is typically proportional to N3N^3N3.
Explanation:
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Power Number (NpN_pNp): The power number is a dimensionless parameter that relates the power consumption in a stirred tank to the fluid dynamic conditions. It is defined as:
Np=Pρ⋅N3⋅D5N_p = \frac{P}{\rho \cdot N^3 \cdot D^5}Np=ρ⋅N3⋅D5P
Where:
- PPP is the power input,
- ρ\rhoρ is the fluid density,
- NNN is the impeller rotational speed,
- DDD is a characteristic length (often the impeller diameter).
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Behavior at High Reynolds Numbers: At high Reynolds numbers (Re), the flow in the stirred tank becomes turbulent, and the power number NpN_pNp tends to become constant. This indicates that the power input is primarily dependent on the impeller speed and less on other parameters.
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Variation with Impeller Speed (NNN): In this regime, the power input PPP is proportional to N3N^3N3. This means that doubling the impeller speed NNN would increase the power input by a factor of 23=82^3 = 823=8.
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Other Options:
- N0N^0N0 (N°): Implies no dependence on impeller speed, which is not the case because power input increases with impeller speed.
- N1N^1N1 (N1): Implies a linear relationship, which typically does not hold at high Reynolds numbers where turbulent effects dominate.
- N2N^2N2 (N2): Implies a quadratic relationship, which may be observed in some regimes but not typically at high Reynolds numbers where N3N^3N3 dependence is more common.
Therefore, at high Reynolds numbers in a stirred tank reactor, the variation of power input with impeller rotational speed NNN is proportional to N3N^3N3. This reflects the dominance of turbulent flow effects and the resulting power consumption in the system.
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ANS:C - David Warner
David Warner became the fastest batter to complete 1000 runs in ODI World Cup, reaching the milestone in 19 innings. Warner reached the milestone in 19 innings to break Sachin Tendulkar and AB de Villiers joint record of 20 innings.
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ANS:A -
Cyprus
India, and Cyprus signed three agreements when S. Jaishankar visited Nicosia.
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ANS:A -
USA
US Vice-President Kamala Harris names Indian-American Rajeev Badyal to the National Space Council Advisory Group.
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ANS:B - Pakistan
Pakistan bought 25 China-made J-10C fighter jets in response to India's Rafale aircraft acquisition
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ANS:D -
Pakistan
Pakistan National Security Committee (NSC) approved the 'citizen-centric' National Security Policy.
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