Question

1. application of the scaling laws in miniaturization is to assess the consequences on

(a) physical effect,   (b) economic effect, (c) market effect.

2. Scaling laws are derived from

(a) experience from design engineers, (b) the laws of Physics, (c) market demands.

3. Scaling geometry is critical in miniaturizing

(a) moving Components, (b) sensing components, (c) overall dimensions of MEMS products.

4. The Trimmer's force scaling vector is used to assess miniaturization relating to

(a) heat flow in solids, (b) fluid flow, (c) rigid body dynamics in the design of MEMS.

5. For order 1 scaling such as surface-to-volume scaling, the acceleration varies

(a) heat flow in solids, (b) to the square power, (c) to the cubic power.

6. The reason why electrostatic forces are favored over the electromagnetic forces in MEMS actuation is that electrostatic forces scale

(a) better,   (b) worse, (c) about the same as the electromagnetic forces.

7. The electromagnetic forces scale how many orders worse than electrostatic forces?

(a) 2, (b) 3, (c) 4.

8. In MEMS devices, power loss due to electrical resistivity compared with small-sized devices,

(a) much more severe, (b) less severe, (c) about the same.

9.The volumetric flow of fluid flowing in a smaller circular conduit is

(a) much greater, (b) about the same as, (c) much smaller than that in a lager conduit.

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10. The pressure drop fluid flowing through a smaller circular conduit is

(a) much greater, (b) about the same as, (c) much smaller than that in a lager conduit.

11. The effect of surface tension on a fluid flow in a capillary tube makes the pressure drop

(a) much greater, (b) about the same as, (c) much smaller than the same flow in meso-size tube.

12. Heat flows (a) faster, (b) slower, (c) about the same as in a smaller solid than in a lager sold.

13. The mode of heat transmission in gas in extremely narrow passage is (a) conduction, (b) convention, (d)radiation.

14. Heat transmission in gases is drastically different in a narrow passage of size less than (a) 5, (b) 7, (c) 9. where,  is the mean free path of gas molecules.

Answer 1