Q2.Gear 2 rotates at 1200 rpm in counter clockwise direction and engages with Gear 3. Gear 3
and Gear 4 are mounted on the same shaft. Gear 5 engages with Gear 4. The numbers of teeth
on Gears 2, 3, 4 and 5 are 20, 40, 15 and 30, respectively. The angular speed of Gear 5 is
Q6.Consider the turbulent flow of a fluid through a circular pipe of diameter, D. Identify the
correct pair of statements.
I. The fluid is well-mixed
II. The fluid is unmixed
III. ReD < 2300
IV. ReD > 2300
Answer : Option DExplaination / Solution:
ReD > 2300 means it is a turbulent flow. In turbulent flow, the fluid is well mixed. The fluid
is unmixed, for a very-low Reynolds number laminar flow.
Q10.For a gas turbine power plant, identify the correct pair of statements.
P. Smaller in size compared to steam power plant for same power output
Starts quickly compared to steam power plant
R. Works on the principle of Rankine cycle
S. Good compatibility with solid fuel
Answer : Option AExplaination / Solution:
Steam power plants are bulky due to presence of boiler and condenser. Gas turbines are
compact, as compressors and turbines are coupled on a common shaft. In steam power plants,
boiler takes lot of time to get started, as compared to Gas Turbines.
Total Question/Mark :
Scored Mark :
Mark for Correct Answer : 1
Mark for Wrong Answer : -0.5
Mark for Left Answer : 0