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Directions to Solve

Some scholars were exploring the forest of Middle America. They discovered some buildings which were in ruins. These buildings were ...(1)... ruined by the encroaching forest. It was also clear that these buildings were no ordinary structures. They were remnants of a ...(2)... civilisation. The scholars got interested. They excavated more and discovered ...(3)... their utmost surprise the remains of flourishing civilization-the Maya's ...(4)... they named it. Thus it was as late in ...(5)... 19th that the secrets of new civilization were ...(6)... For sometime the scholars believed that the Mayan's must have ...(7)... the descendants of ancient Egyptians or one of the lost tribes of Israel; or perhaps a brand of the South East Asia's immigrants. However they could not come to an unanimous decision. Nonetheless the fact remains that even-to day the Mayan is one of ...(8)... most ancient cicilizations. This civilisation was situated in the ...(9)... of Middle America. It covered an area equivalent to France, ...(10)... spread across Guatemala, Belize and some part of Mexico Honduras. It started in 2500 B.C and continued its progress till 34 ...(11)... later. Throughout its period of progress, the people struggled against the invading ...(12)... They used to burn the plants and make the land ...(13)... for civilization. Their staple food was maize. but even while ...(14)... for existence, they found time to build remarkable buildings for ...(15)... they used mortar, sandstone and volcanic rock. The buildings do tell us about the technological advances they had attained.

Q1: (solve as per the direction given above)

A unparalleled

B unmatched

C unearthed

Q2: In ideal machines, mechanical advantage is __________ velocity ratio.

A less than

B equal to

C greater than

Q3: The minimum force required to slide a body of weight W on a rough horizontal plane is

A W tan θ

B W sin θ

C W cos θ

D none of these

Q4: The moment of inertia of a square of side a about its diagonal is

A a4/16

B a2/8

C a3/12

D a4/12

Q5: The angular velocity (in rad / s) of a body rotating at N revolutions per minute is

AN/180

BN/60

C πN/180

D πN/60

Q6: The maximum efficiency of a lifting machine is

A m/V.R.

B 1/(m x V.R.)

C V.R./m

D 1/m

Q7: The centre of gravity of a semi-circle lies at a distance of __________ from its base measured along the vertical radius.

A 3r/4π

B 4r/ 3π

C 3r/ 8

D 8r/3

Q8: The process of finding out the resultant force is called __________ of forces.

A composition

B resolution

Q9: A weight of 1000 N can be lifted by an effort of 80 N. If the velocity ratio is 20, the machine is

A ideal

B reversible

C non-reversible

Q10: In a framed structure, as shown in the below figure, the force in the member BC is

A W/3 (tension)

B W/3 (tension)

C 2W/3 (tension)

D 2W/3 (compression)