McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Electrical Engineering , Chemical Engineering .
| 201. |
What are the characteristics of the monolithic devices? |
| A. | the drug has a large therapeutic index |
| B. | aqueous solutions |
| C. | control drug release by partitioning the drug from the oil |
| D. | administration of emulsions |
| Answer» A. the drug has a large therapeutic index | |
| Explanation: monolithic devices are used when the rate of drug diffusion from the device is higher than the rate of drug permeation through the stratum corneum. there are two categories of matrix devices one is where the drug is dissolved in the polymer matrix and the other is where the drug is dispersed. | |
| 202. |
What are the characteristics of the mixed monolithic-reservoir devices? |
| A. | the drug has a large therapeutic index |
| B. | drug permeation rate is high |
| C. | the drug-polymer matrix is layered by rate- controlling membrane |
| D. | administration of emulsions |
| Answer» C. the drug-polymer matrix is layered by rate- controlling membrane | |
| Explanation: this device has drug release kinetics intermediate between monolithic and reservoir systems. here the drug-polymer matrix is layered by a rate controlling membrane. the release is controlled initially by the membrane but as the drug gets depleted the rate is controlled by diffusion of the drug. | |
| 203. |
The absorption of the ophthalmic drug does not depend on which of the following? |
| A. | physicochemical properties of the permeating molecule |
| B. | drainage of tears |
| C. | output of tears |
| D. | size of the eyeball |
| Answer» D. size of the eyeball | |
| Explanation: the absorption of the ophthalmic drug across the corneal membrane is a diffusion process and depends largely on the physicochemical properties of the permeating molecule that is the drug. it also depends upon the drainage and output of tears. drugs of ophthalmic use are such as atropine, local anesthetics, epinephrine, etc. | |
| 204. |
Which of the following is false in regarding reservoir devices? |
| A. | these devices are used when the drug permeation rate is rapid |
| B. | the release of the drug is controlled |
| C. | suitable for low therapeutic indices |
| D. | the drug is contained in a powder form floating on liquid |
| Answer» D. the drug is contained in a powder form floating on liquid | |
| Explanation: the drug is contained in a reservoir as a suspension liquid or gel carrier. the thin polymeric membrane is made up of olefinic polymers or pvc. when applied on skin it shows rapid release at first and then zero order release as long as the solution inside the reservoir is saturated. | |
| 205. |
Which of the following is true for monolithic devices? |
| A. | these devices are used when the drug permeation rate is rapid |
| B. | the release of the drug is controlled |
| C. | suitable for drugs with large therapeutic indices |
| D. | the drug is contained in a powder form floating on liquid |
| Answer» C. suitable for drugs with large therapeutic indices | |
| Explanation: the drug used in these devices has a large therapeutic index. the drug release rate from the matrix is rapid initially and then falls as the matrix gets depleted of the drug. the polymer employed for the matrix system may be hydrophilic or lipophilic. these polymers include pvc, pvp, and polysaccharides. | |
| 206. |
Which of the following is false for monolithic devices? |
| A. | the drug used for these devices has large therapeutic indices |
| B. | there are three categories of matrix devices |
| C. | 1st type has the drug dissolved in the polymer matrix |
| D. | 2nd type has drug dispersed |
| Answer» B. there are three categories of matrix devices | |
| Explanation: the drug used in these devices has a large therapeutic index. such that overdosing does not precipitate toxic reactions. there are two categories of matrix devices one is where the drug is dissolved in the polymer matrix and the other is where the drug is dispersed. the polymer employed for the matrix system may be hydrophilic or lipophilic. these polymers include pvc, pvp, and polysaccharides. | |
| 207. |
Wireless operates services are based on a Wi-Fi Positioning System (WPS). |
| A. | skydrive |
| B. | skyhook |
| C. | skylook |
| D. | none of the mentioned |
| Answer» B. skyhook | |
| Explanation: the advantage of wps is that there are hundreds of millions of wi-fi access points worldwide and they are closer to the mobile device. | |
| 208. |
Point out the wrong statement. |
| A. | mems stands for microelectromechanical systems |
| B. | mems as a class can be between 1000 and 100000 micrometers in size |
| C. | several mems are packaged in smartphones |
| D. | all of the mentioned |
| Answer» B. mems as a class can be between 1000 and 100000 micrometers in size | |
| Explanation: mems as a class can be between 1 and 1000 micrometers in size. | |
| 209. |
Which of the following system is constantly polling locations to update them and recalibrating data points to improve accuracy over time? |
| A. | wps |
| B. | gps |
| C. | xps |
| D. | all of the mentioned |
| Answer» C. xps | |
| Explanation: the system uses a large reference database of wi-fi access points and cell tower ids, raw position data from each location source (a signal), and the company’s proprietary algorithm to locate the device. | |
| 210. |
Which of the following has a Java API that works with the Skyhook network? |
| A. | looki |
| B. | look |
| C. | loki |
| D. | all of the mentioned |
| Answer» C. loki | |
| Explanation: loki has its browser plug-in to locate users for subscribing websites. | |
| 211. |
Point out the correct statement. |
| A. | mems is a class of very small sensor or actuator devices where small mechanical systems are driven by electricity to indicate a position |
| B. | the incorporation of low-cost geo-sensors in the form of gps chips into mobile devices opens the mobile user to a whole range of services based on the client’s location |
| C. | the iphone uses the proximity sensor to turn the screen off when a user puts the phone to his face |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| Explanation: there are many more contexts that can be used in processing client requests and returning relevant information. | |
| 212. |
Which of the following service is an example of push technology? |
| A. | automated software updates |
| B. | comet |
| C. | http streaming |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| Explanation: the opposite of a push is a pull technology, in which the client polls for and requests a transaction. | |
| 213. |
The IRC protocol and the XMPP IM and VoIP protocol are examples of push technologies. |
| A. | p2p |
| B. | c2c |
| C. | b2b |
| D. | none of the mentioned |
| Answer» A. p2p | |
| Explanation: the xmpp pubsub extension is how apple creates a push service for mobileme. | |
| 214. |
Which of the following transport protocol combined with XMPP can be used for push service? |
| A. | bosh |
| B. | uosh |
| C. | mosh |
| D. | all of the mentioned |
| Answer» A. bosh | |
| Explanation: bosh stands for bidirectional streams over synchronous http. | |
| 215. |
In the parlance of system design, the active transfer process is referred to as “push” and server is called |
| A. | cdn |
| B. | mda |
| C. | mdb |
| D. | none of the mentioned |
| Answer» B. mda | |
| Explanation: client is called mail user agent(mua). | |
| 216. |
There are three types of the solar cells. |
| A. | true |
| B. | false |
| Answer» A. true | |
| Explanation: there are three types of solar cells. single crystal, polycrystal, and amorphous silicon cells are the major types of solar cells. | |
| 217. |
Series and parallel combination of the solar cell is known as |
| A. | solar array |
| B. | solar light |
| C. | solar sight |
| D. | solar eye |
| Answer» A. solar array | |
| Explanation: series and parallel combination of the solar cell is known as solar array. shunt diodes are used to avoid the circulating current. | |
| 218. |
Calculate Fill factor using the data: Pmax=15 W, Voc=18 V, Isc=4 A. |
| A. | .65 |
| B. | .59 |
| C. | .20 |
| D. | .98 |
| Answer» C. .20 | |
| Explanation: fill factor is the ratio of the | |
| 219. |
Calculate the line voltage in star connection when phase voltage=311 V. |
| A. | 548.29 v |
| B. | 538.66 v |
| C. | 587.28 v |
| D. | 185.58 v |
| Answer» B. 538.66 v | |
| Explanation: the line voltage in case of star connection is 1.73 times of phase voltage. it leads the phase voltage by an angle of 30°. vl-l | |
| 220. |
The slope of the V-I curve of a solar cell is 66.1°. Calculate the value of resistance. Assume the relationship between voltage and current is a straight line. |
| A. | 3.5 Ω |
| B. | 2.2 Ω |
| C. | 2.5 Ω |
| D. | 2.9 Ω |
| Answer» B. 2.2 Ω | |
| Explanation: the slope of the v-i curve of a solar cell is resistance. the slope given is 66.1° so r=tan(66.1°)=2.2 Ω. the slope of the i-v curve is reciprocal of resistance. | |
| 221. |
SCIM has a |
| A. | shorter life |
| B. | medium life |
| C. | longer life |
| D. | infinite life |
| Answer» C. longer life | |
| Explanation: scim stands for squirrel cage induction motor. it has high efficiency, | |
| 222. |
Calculate the active power in a 11710 H inductor. |
| A. | 8245 w |
| B. | 1781 w |
| C. | 0 w |
| D. | 1964 w |
| Answer» C. 0 w | |
| Explanation: the inductor is a linear element. it only absorbs reactive power and stores it in the form of oscillating energy. the voltage and current are 90° in phase in case of the inductor so the angle between v & i is 90°. p = vicos90° = 0 w. | |
| 223. |
Full form of CEL is |
| A. | central electronics limited |
| B. | central electrical limited |
| C. | circle electronics limited |
| D. | circle electrical limited |
| Answer» A. central electronics limited | |
| Explanation: the full form of cel is central | |
| 224. |
Full form of BEL is |
| A. | busy electronics limited |
| B. | burden electrical limited |
| C. | bharat electronics limited |
| D. | brahma electrical limited |
| Answer» C. bharat electronics limited | |
| Explanation: the full form of bel is bharat electronics limited. it is a government of india enterprise founded in 1954. it is a publicly listed company. | |
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