Q:

Who had announced that democracy is a government " of the people, by the people and for the people " ?

A) Abraham Lincoln	B) George Washignton
C) Theodore Roosevelt	D) Winston Churchill

Answer & Explanation Answer: A) Abraham Lincoln

Explanation:

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10 2682

Q:

Removal of oil and grease from sewage [waste water]

A) Skimming	B) Filtration
C) Screening	D) None of the above

Answer & Explanation Answer: A) Skimming

Explanation:

Skimming is the removal of any material or particles that are floating on the surface. Hence, Removal of oil and grease from sewage - waste water is called as skimming.

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4 2682

Q:

Which substance contains metallic bonds?

A) C6H12O6	B) Hg
C) H2O	D) NaCl

Answer & Explanation Answer: B) Hg

Explanation:

Metallic bond is a bond between two metal atoms. Here in the given option Hg is the only metal with metallic bond.

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4 2681

Q:

Smallest units of meaning in a language

A) Pragmatics	B) phoneme
C) morpheme	D) syntax

Answer & Explanation Answer: C) morpheme

Explanation:

A morpheme is the smallest unit of a word that provides a specific meaning to a string of letters.

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Q:

Insert command falls in which sub-language of SQL ?

A) DCL	B) DQL
C) DML	D) DDL

Answer & Explanation Answer: C) DML

Explanation:

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5 2681

Q:

three_resistors_are_arranged_in_a_circuit_as_shown_above1559105724.PNG image

Three resistors are arranged in a circuit as shown above. The battery has an unknown but constant emf ε and a negligible internal resistance.

Now, determine the equivalent resistance of the three resistors.

A) 12 Ω	B) 10 Ω
C) 16 Ω	D) 15 Ω

Answer & Explanation Answer: A) 12 Ω

Explanation:

From the given circuit,

three_resistors_are_arranged_in_a_circuit_as_shown_above1559105964.PNG image

The resistors R1 and R2 are in parallel connection and R3 is in series with R1 & R2

The equivalent resistance of R1 and R2 is

Req = (12 × 4)/(12 + 4) = 3 Ω.

Adding R3 in series with the pair gives

R = Req + 9

R = 3 + 9

R = 12 Ω.

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2 2681

Q:

Which of the following causes adiabatic temperature changes in atmosphere?

A) Deflection and advection	B) Latent heat of condensation
C) Expansion and compression of the air	D) Partial absorption of solar radiation by the atmosphere

Answer & Explanation Answer: C) Expansion and compression of the air

Explanation:

Application of temperature changes in the atmosphere is in adiabatics, or temperature change which are caused by compressing or allowing air to expand.

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Filed Under: Physics
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Q:

Instrument for measuring time is called _____ .

A) Diagometer	B) Anemometer
C) Durometer	D) Chronometer

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