MCQOPTIONS
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MCQOPTIONS
This section includes 2095 Mcqs, each offering curated multiple-choice questions to sharpen your Php knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
When a ferromagnetic core is inserted into an inductor, what happens to the flux linkage? |
| A. | Increases |
| B. | Decreases |
| C. | Remains the same |
| D. | Becomes zero |
| Answer» B. Decreases | |
| 252. |
Dendrite is used as a ________ adhesive. |
| A. | Contact |
| B. | Hot |
| C. | Reactive |
| D. | Pressure sensitive |
| Answer» B. Hot | |
| 253. |
_________ glue is used for curing with water. |
| A. | Epoxy |
| B. | Polyamide |
| C. | Silicone |
| D. | Polyurethane |
| Answer» E. | |
| 254. |
Araldite glue is primarily used in ________ |
| A. | Plastics |
| B. | Automobile parts |
| C. | Textile |
| D. | Leathers |
| Answer» C. Textile | |
| 255. |
Epoxy adhesives are widely used in _________ |
| A. | Carpentry |
| B. | Plastics |
| C. | Glasses |
| D. | Steel |
| Answer» B. Plastics | |
| 256. |
Which operation does the following figure portray? |
| A. | Calendering |
| B. | Milling |
| C. | Extrusion |
| D. | Trimming |
| Answer» B. Milling | |
| 257. |
Warming up of a compound and feeding it to an extruder is the operation of _________ |
| A. | Tubing |
| B. | Tumbling |
| C. | Buffing |
| D. | Trimming |
| Answer» B. Tumbling | |
| 258. |
Which of these is not an ln operation of calendering? |
| A. | Sheeting |
| B. | Frictioning |
| C. | Skim coating |
| D. | Buffing |
| Answer» E. | |
| 259. |
How much sulfur must be added to rubber for vulcanization? |
| A. | 1-5% |
| B. | 7-20% |
| C. | 25-35% |
| D. | > 40% |
| Answer» B. 7-20% | |
| 260. |
Larger DNA fragments require a ___________ transfer time. |
| A. | Longer |
| B. | Shorter |
| C. | Medium |
| D. | Very high |
| Answer» B. Shorter | |
| 261. |
Which membranes have greater binding capacity than nitrocellulose membranes? |
| A. | Sucrose |
| B. | Agarose |
| C. | Nylon |
| D. | Teflon |
| Answer» D. Teflon | |
| 262. |
The DNA molecules are immobilized on the _____________ in southern blotting technique. |
| A. | Reservoir |
| B. | Gel |
| C. | Tray |
| D. | Membrane |
| Answer» E. | |
| 263. |
In southern blotting ___________ is present in the reservoir. |
| A. | DNA |
| B. | Buffer |
| C. | Gel |
| D. | Agarose |
| Answer» C. Gel | |
| 264. |
What is used to transfer nucleic acid from gels to membranes for further analysis? |
| A. | Gel electrophoresis |
| B. | PFGE |
| C. | Blotting |
| D. | PCR |
| Answer» D. PCR | |
| 265. |
The top piston ring nearer to the piston crown is known as __________ |
| A. | compression ring |
| B. | oil ring |
| C. | scrapper ring |
| D. | groove ring |
| Answer» B. oil ring | |
| 266. |
Piston rings are plated with chromium, cadmium or phosphate in order to __________ |
| A. | reduce cost |
| B. | improve surface finish |
| C. | prevent clogging |
| D. | reduce wear and eliminate scuffing |
| Answer» E. | |
| 267. |
Piston rings are usually made of __________ |
| A. | cast iron |
| B. | aluminium |
| C. | carbon steel |
| D. | phosphor bronze |
| Answer» B. aluminium | |
| 268. |
The pistons are usually given a coating such as tin plating in order to __________ |
| A. | reduce weight |
| B. | conduct heat efficiently |
| C. | reduce the possibility of scoring |
| D. | reduce friction |
| Answer» D. reduce friction | |
| 269. |
Which is the false statement about the advantages of V-type engine? |
| A. | compact design requiring lesser space |
| B. | improved distribution of air to cylinder |
| C. | casting less liable to distortion |
| D. | less overhead clearance |
| Answer» E. | |
| 270. |
If overhead clearance is less, then which of the following type of engine should be selected? |
| A. | V-type |
| B. | In-line type |
| C. | Vertical |
| D. | Horizontal |
| Answer» E. | |
| 271. |
What is the function of a fuel pump in a petrol pump? |
| A. | inject fuel in cylinder |
| B. | supply fuel when carburetor fails |
| C. | pump fuel so that it reaches carburettor |
| D. | improve thermal efficiency |
| Answer» D. improve thermal efficiency | |
| 272. |
Crankcase explosion in I.C. engine usually occurs as __________ |
| A. | first a mild explosion followed by a big explosion |
| B. | first a big explosion followed by a mild explosion |
| C. | both mild and big explosions occur simultaneously |
| D. | never occurs |
| Answer» B. first a big explosion followed by a mild explosion | |
| 273. |
Which mode uses 16 higher real-time class priority levels? |
| A. | real mode |
| B. | user mode |
| C. | kernel mode |
| D. | protected mode |
| Answer» D. protected mode | |
| 274. |
Which of the following uses a swap file to provide the virtual memory? |
| A. | windows NT |
| B. | kernel |
| C. | memory |
| D. | memory management unit |
| Answer» B. kernel | |
| 275. |
If the DC excitation is suddenly dropped to 0, the three phase alternator _________ |
| A. | runs as motor |
| B. | stops to zero speed in few seconds |
| C. | continues to run as motor but at lower speed |
| D. | no change in the operating conditions |
| Answer» B. stops to zero speed in few seconds | |
| 276. |
The main exciter used in DC excitation is ________ |
| A. | field on stator |
| B. | armature on stator |
| C. | field on rotor |
| D. | field on poles |
| Answer» B. armature on stator | |
| 277. |
The brushless excitation and conventional DC excitation systems are comparable but one significant change is _______ |
| A. | pilot exciter is brushless permanent magnet motor |
| B. | three phase rectifier feeds directly to main exciter |
| C. | a three phase rectifier is fed by main exciter |
| D. | no direct rectification is provided to the pilot exciter |
| Answer» B. three phase rectifier feeds directly to main exciter | |
| 278. |
The excitation system and speed of alternator has _______ |
| A. | linear response |
| B. | exponential response |
| C. | rectangular hyperbola response |
| D. | circular response |
| Answer» B. exponential response | |
| 279. |
The static excitations mainly comprises of _______ |
| A. | brushless excitation system |
| B. | thyrister based excitation system |
| C. | synchronous motor excitation system |
| D. | brushless and thyristor based excitation system |
| Answer» C. synchronous motor excitation system | |
| 280. |
What are the main problems faced by conventional DC exciters? |
| A. | cooling and maintainance |
| B. | wear and tear |
| C. | additional parasitic losses |
| D. | all of the mentioned |
| Answer» E. | |
| 281. |
The pilot exciter in dc exciters is ________ |
| A. | dc shunt generator feeding field winding of mains |
| B. | universal motor |
| C. | stepper motor feeding the field winding of mains |
| D. | any of the mentioned |
| Answer» B. universal motor | |
| 282. |
In large synchronous machine, field winding is placed on ______ and ac supply on ______ |
| A. | rotor, stator |
| B. | stator, rotor |
| C. | armature, slots |
| D. | pole shoes, stator |
| Answer» B. stator, rotor | |
| 283. |
Field winding of a dc machine _________ |
| A. | always absorbs power |
| B. | absorbs real power at lagging load |
| C. | delivers power while behaving as generator |
| D. | always delivers power |
| Answer» B. absorbs real power at lagging load | |
| 284. |
A 3 phase synchronous machine is _________ excited machine. |
| A. | doubly |
| B. | single |
| C. | two stage |
| D. | feedback based |
| Answer» B. single | |
| 285. |
In which method of determination of yield point is the load applied uniformly on the beam? |
| A. | Divider method |
| B. | High beam method |
| C. | Drop of beam method |
| D. | Extension under load method |
| Answer» D. Extension under load method | |
| 286. |
The yield point of a material does not exist for those materials that have a _____________ region in that space of the stress-strain curve. |
| A. | smooth |
| B. | shift |
| C. | turbulent |
| D. | high |
| Answer» B. shift | |
| 287. |
In which method is there usage of a pair of dividers? |
| A. | Set method |
| B. | Divider method |
| C. | Drop of beam method |
| D. | Dividend method |
| Answer» C. Drop of beam method | |
| 288. |
The yield point can be determined in _____________ |
| A. | wood |
| B. | carbon |
| C. | pure molybdenum |
| D. | mild carbon steel |
| Answer» E. | |
| 289. |
To obtain consistent results in finding properties of materials, the specimen must be/have __________ |
| A. | no scratches |
| B. | straightened |
| C. | washed with methyl |
| D. | bent |
| Answer» B. straightened | |
| 290. |
What is the yield point of a material? |
| A. | Change in the strain of a material |
| B. | The ratio of proof stress to the area |
| C. | The elasticity of a material |
| D. | Point where there is a substantial increase in elongation without a rise in load |
| Answer» E. | |
| 291. |
The modulus of elasticity of steel is ____________ pounds per square inch. |
| A. | 6,500,000 |
| B. | 10,000,000 |
| C. | 30,000,000 |
| D. | 1000,00 |
| Answer» D. 1000,00 | |
| 292. |
If the expected yield strength of a material is 50,000 pounds per square inch and modulus of elasticity is 10,000, what is the normal elongation of the material? |
| A. | 50,000,000 inch per inch gage length |
| B. | 5 inch per inch gage length |
| C. | 50 inch per inch gage length |
| D. | 5 inch per inch gage length |
| Answer» C. 50 inch per inch gage length | |
| 293. |
The second part of specified extensions in the extensions under load method typically involves adding an elongation of ____ inch per inch of gage length. |
| A. | 0.2 |
| B. | 2.02 |
| C. | 0.02 |
| D. | 0.002 |
| Answer» E. | |
| 294. |
The extension under load method is easier to use in finding yield strength because ___________ |
| A. | no necessity to plot a curve |
| B. | it is not easier |
| C. | it is the only method available |
| D. | randomness |
| Answer» B. it is not easier | |
| 295. |
What does length ‘AC’ in the diagram represent? |
| A. | Yield gage |
| B. | Yield strength |
| C. | Set |
| D. | Yield point |
| Answer» D. Yield point | |
| 296. |
There is often no choice between the two methods of determination of yield strength available, as it is predetermined. |
| A. | True |
| B. | False |
| Answer» C. | |
| 297. |
The yield strength of a material is ___________ |
| A. | the proof stress of a material |
| B. | the strain where the strength of material fails |
| C. | the elongation |
| D. | the particular stress where a material shows specified elongation under a load |
| Answer» E. | |
| 298. |
Tension testing must be accurate within a percentage of ___________ |
| A. | +2% |
| B. | +1% |
| C. | +3/2 % |
| D. | 21% |
| Answer» D. 21% | |
| 299. |
Tension test can give us the yield strength of a material. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 300. |
Calculate the initial weight of moisture if one kg block of borax laundry soap with initial moisture content of 24% is dried and brought to 20%. |
| A. | 0.194 |
| B. | 0.236 |
| C. | 0.876 |
| D. | 0.239 |
| Answer» B. 0.236 | |