The motion of air mass in a tornado is a________________?

Related Mcqs:

1. In a forced vortex motion, the velocity of flow is________________?

   A. directly proportional to its radial distance from axis of rotation
   B. inversely proportional to its radial distance from the axis of rotation
   C. inversely proportional to the square of its radial distance from the axis of rotation
   D. directly proportional to the square of its radial distance from the axis of rotation

2. The position of center of pressure on a plane surface immersed vertically in a static mass of fluid is______________?

   A. at the centroid of the submerged area
   B. always above the centroid of the area
   C. always below the centroid of the area
   D. none of the above

3. A closed tank containing water is moving in a horizontal direction along a straight line at a constant speed. The tank also contains a steel ball and a bubble of air. If the tank is decelerated horizontally, then________________?

   1. the ball will move to the front
   2. the bubble will move to the front
   3. the ball will move to the rear
   4. the bubble will move to the rear
   Find out which of the above statements are correct ?

   A. (1) and (2)
   B. (1)and(4)
   C. (2) and (3)
   D. (3) and (4)

4. If a vessel containing liquid moves downward with a constant acceleration equal to ‘g’ then_____________?

   A. the pressure throughout the liquid mass is atmospheric
   B. there will be vacuum in the liquid
   C. the pressure in the liquid mass is greater than hydrostatic pressure
   D. none of the above

5. Coefficient of contraction for an external cylindrical mouthpiece is_________________?

   A. 1.00
   B. 0.855
   C. 0.7H
   D. 0.611

6. A fluid of kinematic viscosity 0.4 cm2/sec flows through a 8 cm diameter pipe. The maximum velocity for laminar flow will be__________________?

   A. less than 1 m/sec
   B. 1 m/sec
   C. 1.5 m/sec
   D. 2 m/sec

7. The length of a pipe is 1 km and its diameter is 20 cm. If the diameter of an equivalent pipe is 40 cm, then its length is_____________________?

   A. 32 km
   B. 20 km
   C. 8 km
   D. 4 km

8. The velocity distribution for laminar flow through a circular tube__________________?

   A. is constant over the cross-section
   B. varies linearly from zero at walls to maximum at centre
   C. varies parabolically with maximum at the centre
   D. none of the above

9. Equation of continuity is based on the principle of conservation of_________________?

   A. mass
   B. energy
   C. momentum
   D. none of the above

10. The increase in meta centric height_________________?

    1. increases stability
    2. decreases stability
    3. increases comfort for passengers
    4. decreases comfort for passengers
    The correct answer is?

    A. (1) and (3)
    B. (1)and(iv)
    C. (2) and (3)
    D. (2) and (4)