GATE Questions

Q:

Every rational number is an integer.

A) TRUE B) FALSE
Answer & Explanation Answer: B) FALSE

Explanation:

Any integer 'i' can be written as i = i/1, which is a rational number. Clearly, 7/2,-5/4, etc... are rational numbers but they are not integers.


Hence, from the above analysis, every integer is a rational number but a rational number need not be an integer.


 


Therefore the given statement that 'Every rational number is an integer' is FALSE.

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Subject: Arithmetical Reasoning
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6 2500
Q:

When a running car stops suddenly, the passengers tends to lean forward because of

A) Gravitational force B) Inertia of motion
C) Law of conservation of mass D) Both B & C
 
Answer & Explanation Answer: B) Inertia of motion

Explanation:

When a running car stops suddenly, the passengers tends to lean forward because of Inertia of motion.

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Q:

A and B entered into a partnership with Rs.800 and Rs.1600 respectively. From 9th months onward they each decided to invest Rs.100 more on starting of each month. If total annual profit is Rs.7700 then find the profit share of A.

A) Rs.2550 B) Rs.3200
C) Rs.2650 D) Rs.2450
 
Answer & Explanation Answer: C) Rs.2650

Explanation:

A : B = (800 × 8+ 900+ 1000+ 1100+ 1200): (1600 × 8+ 1700+ 1800+ 1900+ 2000)
A : B = 53 : 101
Profit of A ⇒ 7700 ×53/154 = 2650 Rs.

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0 2489
Q:

Which alternative energy source is exhaustible?

A) tidal energy B) wind energy
C) solar energy D) geothermal energy
 
Answer & Explanation Answer: D) geothermal energy

Explanation:

Based on conventionality in deriving energy, energy sources could be classified as

 

Conventional ::

coal, oil, hydro, nuclear, etc... sources which can be used up or exhaustible.

(and)

Non - conventional ::

solar, wind, tidal, geothermal, biogas, etc... sources which are not exhausted.

 

Among the given options, Geothermal energy is the alternative energy source among all the choices that are given in the question, that is exhaustible.

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Filed Under: Physics
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4 2488
Q:

How fast do satellites orbit the earth?

A) 28,000 kmph B) 26,000 kmph
C) 17,500 kmph D) 22,500 kmph
 
Answer & Explanation Answer: A) 28,000 kmph

Explanation:

Satellites orbit the earth at a speed of 28,000 kmph.

Satellites that are further away actually travel slower. The International Space Station has a Low Earth Orbit, about 400 kilometers (250 miles) above the earth's surface. Objects orbiting at that altitude travel about 28,000 kilometers per hour (17,500 miles per hour).

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Q:

When should you stop at green and go at red?

Answer

While eating a watermelon, we all go along the red and stops at green.

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Q:

Which is the only gem of world made of a single element?

A) Platinum B) Diamond
C) Emerald D) Ruby
 
Answer & Explanation Answer: B) Diamond

Explanation:

The only gem of world made of a single element is Diamond.

the_only_gem_of_world_made_of_a_single_element1563602197.jpg image

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Filed Under: Chemistry
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6 2482
Q:

Rust forms when _____ reacts with chemicals in rocks.

A) Water B) Oxygen
C) Nitrogen D) Carbondioxide
 
Answer & Explanation Answer: B) Oxygen

Explanation:

Rust forms when oxygen reacts with chemicals in rocks, and that is often the case with many other elements in general. Like a copper nail being exposed to the air will rust.

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Filed Under: Chemistry
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