Que: Suppose a steel bar of cross sectional area A is subjected to load P at one end and 2P at the other end ,what will be the induced

Ans: Internal stress induced, as we knw stress= force/area, in that case area remain same for both end of rod but force P and 2P are apply but resultant force is only P because resultant force= 2P-P= P, so induced stress = P/A which is either compressive or tensile bcs nature of load are not clearly defined in que.

Que: If I want to set a power plant in desert of 'Rajasthan' and I have option of
steam and gas power plant. Which plant I should set up?

Ans: Obviously gas because steam power plant work with steam that mean prime requirement is water and that unable to find in desert as our requirement whereas gas power plant consume gas as source and water requirement are too low, only use of water in gas power plant for cooling so gas power plant i prefer.

Que: How turbo charger works?

Ans: Turbo charger is used to compress the air which used generally in engine and when engine exhaust burned gases out it has more speed and temp so by using of its speed the small turbine are run then kinetic(speed) of this turbine are used to drive the compressor so air are compressed by that principle turbo charger work.

Que: A bearing is designated as 6205, what is it's bore diameter?

Ans: Last two digit indicates the bore diameter in that problem last digit is 05, and the dia calculate by multiplying it by means of 5 so bore dia= 05 * 5= 25 mm

Que: What is the missing number,
1, 4, 9, ?, 25
A. 15 
B. 16 
C. 17 
D. 18

Ans: B
1*1=1
2*2=4
3*3=9
4*4=16
5*5=25
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Que: What is the missing number
-2, 1, ?, 13, 22
A.4
B.6
C.8
D 10

Ans: B
(1*1)-3 = -2
(2*2)-3 = 1
(3*3)-3 = 6
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Que: What is the missing number in this series?
1, 4, 10, 19, ?
A. 33 
B. 31 
C. 30 
D. 28 
E. 29

Ans: B
This is bcz each number is the sum with 3, 6, 9, 12
so 10+9=19, and 19+12=31.

Que: What do you mean by ELASTICITY and MODULUS OF ELASTICITY?

Ans: ELASTICITY means ability to return their shape after removing force on material.whereas
MODULUS OF ELASTICITY means it is the ratio of stress(tension or compression) to strain.

Que: What are the materials needed to make or build a car?

Ans:
* a) Sulfur is used in tire construction
* b) Aluminum and iron in the car body and engine
* c) Quartz is used in windshield construction
* d) Chromium is used for chrome plating
* e) Copper is used in wiring
* f) Magnesium may be used in the wheels
* g) Zinc would be used in rust plating
* h) Gold may be used in the spark plugs and in electrical connections
* i) Tin may be used in solder
* j) Lead will be used in the batteries
* k) Tungsten may be used in the light bulb filaments.