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MCQOPTIONS
This section includes 2171 Mcqs, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1451. |
Voltage is sometimes referred to as EMF, or Electromotive...? |
| A. | Field |
| B. | Factor |
| C. | Flash |
| D. | Force |
| Answer» E. | |
| 1452. |
What are the three main search expressions, or operators, recognized by Boolean logic? |
| A. | FROM, TO, WHOM |
| B. | AND, OR, NOT |
| C. | SEARCH, KEYWORD, TEXT |
| D. | AND, OR, BUT |
| Answer» C. SEARCH, KEYWORD, TEXT | |
| 1453. |
'.JPG' extension refers usually to what kind of file? |
| A. | System file |
| B. | Animation/movie file |
| C. | MS Encarta document |
| D. | Image file |
| Answer» E. | |
| 1454. |
The input used by an antenna or cable to a TV set uses frequencies called...? |
| A. | IF |
| B. | RF |
| C. | AF |
| D. | SAP |
| Answer» C. AF | |
| 1455. |
'DB' computer abbreviation usually means ? |
| A. | Database |
| B. | Double Byte |
| C. | Data Block |
| D. | Driver Boot |
| Answer» B. Double Byte | |
| 1456. |
The sampling rate, (how many samples per second are stored) for a CD is...? |
| A. | 48.4 kHz |
| B. | 22,050 Hz |
| C. | 44.1 kHz |
| D. | 48 kHz |
| Answer» D. 48 kHz | |
| 1457. |
What will a UPS be used for in a building? |
| A. | To provide power to essential equipment |
| B. | To monitor building electricity use |
| C. | To carry messages between departments |
| D. | To control lighting and power systems |
| Answer» B. To monitor building electricity use | |
| 1458. |
Who built the world's first binary digit computer: Z1...? |
| A. | Konrad Zuse |
| B. | Ken Thompson |
| C. | Alan Turing |
| D. | George Boole |
| Answer» B. Ken Thompson | |
| 1459. |
The NTSC (National Television Standards Committee) is also used in the country of...? |
| A. | Japan |
| B. | France |
| C. | Germany |
| D. | England |
| Answer» B. France | |
| 1460. |
"FET" is a type of transistor, Its full name is ________ Effect Transistor...? |
| A. | Field |
| B. | Factor |
| C. | Flash |
| D. | Force |
| Answer» B. Factor | |
| 1461. |
What are three types of lasers? |
| A. | Gas, metal vapor, rock |
| B. | Pointer, diode, CD |
| C. | Diode, inverted, pointer |
| D. | Gas, solid state, diode |
| Answer» E. | |
| 1462. |
Who is largely responsible for breaking the German Enigma codes, created a test that provided a foundation for artificial intelligence? |
| A. | Alan Turing |
| B. | Jeff Bezos |
| C. | George Boole |
| D. | Charles Babbage |
| Answer» B. Jeff Bezos | |
| 1463. |
Who developed Yahoo? |
| A. | Dennis Ritchie & Ken Thompson |
| B. | David Filo & Jerry Yang |
| C. | Vint Cerf & Robert Kahn |
| D. | Steve Case & Jeff Bezos |
| Answer» C. Vint Cerf & Robert Kahn | |
| 1464. |
Made from a variety of materials, such as carbon, which inhibits the flow of current...? |
| A. | Choke |
| B. | Inductor |
| C. | Resistor |
| D. | Capacitor |
| Answer» D. Capacitor | |
| 1465. |
The most common format for a home video recorder is VHS. VHS stands for...? |
| A. | Video Home System |
| B. | Very high speed |
| C. | Video horizontal standard |
| D. | Voltage house standard |
| Answer» B. Very high speed | |
| 1466. |
What does VVVF stand for? |
| A. | Variant Voltage Vile Frequency |
| B. | Variable Velocity Variable Fun |
| C. | Very Very Vicious Frequency |
| D. | Variable Voltage Variable Frequency |
| Answer» E. | |
| 1467. |
Most modern TV's draw power even if turned off. The circuit the power is used in does what function? |
| A. | Sound |
| B. | Remote control |
| C. | Color balance |
| D. | High voltage |
| Answer» C. Color balance | |
| 1468. |
In which decade was the SPICE simulator introduced? |
| A. | 1950s |
| B. | 1960s |
| C. | 1970s |
| D. | 1980s |
| Answer» D. 1980s | |
| 1469. |
Which is a type of Electrically-Erasable Programmable Read-Only Memory? |
| A. | Flash |
| B. | Flange |
| C. | Fury |
| D. | FRAM |
| Answer» B. Flange | |
| 1470. |
The purpose of choke in tube light is ? |
| A. | To decrease the current |
| B. | To increase the current |
| C. | To decrease the voltage momentarily |
| D. | To increase the voltage momentarily |
| Answer» E. | |
| 1471. |
'.MPG' extension refers usually to what kind of file? |
| A. | WordPerfect Document file |
| B. | MS Office document |
| C. | Animation/movie file |
| D. | Image file |
| Answer» D. Image file | |
| 1472. |
Means for giving direction to the circulation of gases in furnaces are |
| A. | fans. |
| B. | arrangement of heating stock in the furnaces. |
| C. | location of outlet ports and heating & combustion devices. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 1473. |
Cement Kiln is a |
| A. | rotary Kiln |
| B. | tunnel Kiln |
| C. | natural draft furnace |
| D. | batch furnace |
| Answer» B. tunnel Kiln | |
| 1474. |
Reducing atmosphere is maintained in a |
| A. | calcination kiln |
| B. | blast furnace |
| C. | soaking pit |
| D. | L.D. converter |
| Answer» C. soaking pit | |
| 1475. |
If the flame is produced under the hearth and then sweeps up into the heating chamber, this is called a/an __________ furnace. |
| A. | sidefired |
| B. | underfired |
| C. | covered |
| D. | recirculating |
| Answer» C. covered | |
| 1476. |
Flue gas outlet temperature from the chimney of any furnace should be ideally about __________ °C. |
| A. | 50 |
| B. | 100 |
| C. | 150 |
| D. | 250 |
| Answer» D. 250 | |
| 1477. |
Pot furnace which is either regenerative or recupterative, is used in the manufacture of |
| A. | glass |
| B. | stainless steel |
| C. | potteries |
| D. | refractory bricks. |
| Answer» B. stainless steel | |
| 1478. |
The amount of combustible escaping uncon-sumed from the furnace, depends upon the |
| A. | air supplied and furnace temperature. |
| B. | burner design (thoroughness of mixing versus stratification). |
| C. | air preheat and the flow of gases in the furnace (mixing by induction, by acceleration or by change of direction). |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 1479. |
Artificial draught produced by a fan in the furnace can be controlled by the |
| A. | speed of the fan. |
| B. | damper. |
| C. | variation in the pitch of fan blades. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 1480. |
Which one shows the diagramatic heat balance in a furnace ? |
| A. | Sankey diagram |
| B. | Cox chart |
| C. | Ostwald chart |
| D. | None of these |
| Answer» B. Cox chart | |
| 1481. |
Rate of heat release in a furnace, which is the measure of heat intensity is defined as |
| A. | kcal/hr/m³ combustion space. |
| B. | kcal/m³ combustion space. |
| C. | kcal/hr. |
| D. | none of these. |
| Answer» B. kcal/m³ combustion space. | |
| 1482. |
Furnace aerodynamics is related to the __________ in the furnace. |
| A. | movement of gases |
| B. | measurement of flue gas volume |
| C. | temperature control |
| D. | pressure adjustment |
| Answer» B. measurement of flue gas volume | |
| 1483. |
Which of the following accentuates clinker-ing troubles on furnace grate burning coal? |
| A. | Low reactivity of carbonised residue containing high proportion of iron & sulphur. |
| B. | Low forced draft & fuel bed temperature. |
| C. | Thick firebed and preheated primary air. |
| D. | All (a), (b) and (c). |
| Answer» E. | |
| 1484. |
Test specimen for determination of refractoriness under load (RUL) of a refractory is heated in a |
| A. | furnace employing neutral atmosphere. |
| B. | carbon resistance furnace. |
| C. | reducing atmosphere. |
| D. | furnace employing negative pressure. |
| Answer» C. reducing atmosphere. | |
| 1485. |
Combustion of furnace oil in a furnace (soaking pit) with preheated combustion air at 400°C results in saving of about __________ percent furnace oil as compared to its combustion with atmospheric air, if the flue gas outlet temperature from the soaking pit is 1200°C. |
| A. | 5 |
| B. | 60 |
| C. | 20 |
| D. | 40 |
| Answer» D. 40 | |
| 1486. |
Which of the following furnaces will have maximum thermal efficiency ? |
| A. | Soaking pits |
| B. | Walking beam reheating furnace |
| C. | Boiler furnace |
| D. | Rotary kilns |
| Answer» D. Rotary kilns | |
| 1487. |
Out of the following fuels used in a furnace exhausting flue gas at a temperature of 600°C, the percentage stack loss will be maximum in case of complete combustion of |
| A. | furnace oil with air. |
| B. | furnace oil with oxygen. |
| C. | blast furnace gas with air. |
| D. | blast furnace gas with oxygen. |
| Answer» D. blast furnace gas with oxygen. | |
| 1488. |
Which is not accomplished in an underfired furnace ? |
| A. | Increase in heating capacity/m² of floor space. |
| B. | Elimination of cold spot at the bottom of the charge. |
| C. | Reduction in the temperature of furnace gases. |
| D. | Portection of the periphery of the charge from excessive radiation. |
| Answer» B. Elimination of cold spot at the bottom of the charge. | |
| 1489. |
Regenerators are installed in |
| A. | coke ovens |
| B. | open hearth furnace |
| C. | both (a) & (b) |
| D. | neither (a) nor (b) |
| Answer» D. neither (a) nor (b) | |
| 1490. |
In a furnace employing forced draught as compared to induced draught, |
| A. | air is sucked in, so air leaks are more and hence the furnace efficiency is reduced. |
| B. | the fan operates hot and hence blades are liable to corrosion and erosion. |
| C. | positive pressure exists in the furnace. |
| D. | none of these |
| Answer» D. none of these | |
| 1491. |
Which of the following is a natural draft furnace ? |
| A. | Blast furnace stoves |
| B. | Power plant boilers |
| C. | Sintering furnace |
| D. | None of these |
| Answer» B. Power plant boilers | |
| 1492. |
Which of the following is not a directly fired furnace ? |
| A. | By-product coke oven |
| B. | Calcination kiln |
| C. | Sintering furnace |
| D. | Open hearth furnace |
| Answer» B. Calcination kiln | |
| 1493. |
The advantages of firing pulverised coal in the furnace lies in the fact that, it |
| A. | permits the use of high ash content coal. |
| B. | permits the use of low fusion point ash coal. |
| C. | accelerates the burning rate and economises on fuel consumption. |
| D. | all (a), (b) and (c). |
| Answer» D. all (a), (b) and (c). | |
| 1494. |
Which furnace employs natural draft ? |
| A. | Coke oven |
| B. | Boiler |
| C. | Rotary kilns |
| D. | L.D. converter |
| Answer» B. Boiler | |
| 1495. |
Overall thermal efficiency of a lumpy coal fired suitably designed heating furnace, if operated & maintained properly may be about __________ percent. |
| A. | 10-15 |
| B. | 25-30 |
| C. | 45-50 |
| D. | 65-70 |
| Answer» C. 45-50 | |
| 1496. |
Hearth furnaces are not used for |
| A. | roasting |
| B. | melting |
| C. | reheating |
| D. | none of these |
| Answer» E. | |
| 1497. |
Forced recirculation of furnace gases is practised |
| A. | to increase heat transfer by convection. |
| B. | to ensure uniform temperature. |
| C. | in furnaces, operating below 750°C. |
| D. | all (a), (b) and (c). |
| Answer» E. | |
| 1498. |
Design of waste heat boiler for recovery of waste heat from furnace gases depends upon the |
| A. | quantity & temperature of waste gas. |
| B. | dust concentration & nature of dust in waste gas. |
| C. | corrosive nature of the waste gas. |
| D. | all (a), (b) and (c). |
| Answer» C. corrosive nature of the waste gas. | |
| 1499. |
The heating capacity of muffle furnace depends on the |
| A. | surface area & emissivity of the stock. |
| B. | properties of the muffle wall (temperature, area, emissivity). |
| C. | both (a) & (b) |
| D. | neither (a) nor (b) |
| Answer» D. neither (a) nor (b) | |
| 1500. |
__________ atmosphere is maintained inside an iron blast furnace. |
| A. | Oxidising |
| B. | Reducing |
| C. | Inert |
| D. | Decarburising |
| Answer» C. Inert | |