MCQOPTIONS
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MCQOPTIONS
This section includes 8247 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 6301. |
__________ is the most suitable lubricant for drawing mild steel wires? |
| A. | Kerosene |
| B. | Water |
| C. | Sodium stearate |
| D. | Lime water |
| Answer» D. Lime water | |
| 6302. |
Yield strength of a material is determined by the __________ test. |
| A. | creep |
| B. | tension |
| C. | compression |
| D. | endurance |
| Answer» C. compression | |
| 6303. |
Milk is fat dispersed in water. It is an example of |
| A. | suspension |
| B. | emulsion |
| C. | gel |
| D. | solution |
| Answer» C. gel | |
| 6304. |
Absolute zero, pressure will occur, when the molecular momentum of the system becomes zero. A liquid will cease to exist as liquid at |
| A. | high vacuum |
| B. | zero pressure |
| C. | 0 K |
| D. | earth's centre |
| Answer» C. 0 K | |
| 6305. |
Theoretical volume of oxygen required for complete combustion of 1Nm3 of acetylene, in oxy-acetylene welding is __________ Nm3 . |
| A. | 0.5 |
| B. | 1 |
| C. | 2 |
| D. | 2.5 |
| Answer» E. | |
| 6306. |
Out of the following, the joint produced by __________ has the lowest strength. |
| A. | soldering |
| B. | welding |
| C. | brazing |
| D. | rivetting |
| Answer» B. welding | |
| 6307. |
Monazite deposits constitute an important source for the following metal. |
| A. | Thorium |
| B. | Titanium |
| C. | Molybdenum |
| D. | None of the above |
| Answer» B. Titanium | |
| 6308. |
The starting of a car takes time in winter, because the |
| A. | octane number of fuel is decreased. |
| B. | fuel supply for ignition is not sufficient. |
| C. | vaporisation of the fuel is decreased. |
| D. | pour point of fuel decreases. |
| Answer» D. pour point of fuel decreases. | |
| 6309. |
The elastic strain in copper is due to the |
| A. | motion of dislocations. |
| B. | stretching of atomic bonds. |
| C. | breakage of atomic bonds. |
| D. | none of the above. |
| Answer» B. stretching of atomic bonds. | |
| 6310. |
In case of simple harmonic motion, displacement is proportional to the |
| A. | velocity |
| B. | acceleration |
| C. | both (a) & (b) |
| D. | neither (a) nor (b) |
| Answer» C. both (a) & (b) | |
| 6311. |
__________ are normally subjected to sub-zero treatment. |
| A. | Highly stressed parts |
| B. | Gauges or precision parts |
| C. | Cold rolled sheets |
| D. | Non machinable materials |
| Answer» C. Cold rolled sheets | |
| 6312. |
Induced draft fans provided in large thermal power plant boilers have __________ blades. |
| A. | forward curved |
| B. | backward curved |
| C. | double curved |
| D. | radial or straight |
| Answer» C. double curved | |
| 6313. |
Which of the following has the highest value of refractive index ? |
| A. | Brine (sea water) |
| B. | Diamond |
| C. | Distilled water |
| D. | Glass |
| Answer» C. Distilled water | |
| 6314. |
Use of economiser in a boiler plant reduces the fuel consumption for steam generation by about __________ percent. |
| A. | 1 |
| B. | 10 |
| C. | 30 |
| D. | 45 |
| Answer» C. 30 | |
| 6315. |
A good abrasive |
| A. | should be friable. |
| B. | should have low refractoriness. |
| C. | is made up of large size of crystals. |
| D. | should be soft. |
| Answer» B. should have low refractoriness. | |
| 6316. |
Out of the following, __________ pipe is the least corrosion resistant. |
| A. | mild steel |
| B. | copper |
| C. | wrought iron |
| D. | stainless steel |
| Answer» D. stainless steel | |
| 6317. |
In order to protect the aquatic creatures, the dissolved oxygen content in fresh water stream should never be less than __________ PPm. |
| A. | 0.5 |
| B. | 1 |
| C. | 5 |
| D. | 20 |
| Answer» D. 20 | |
| 6318. |
For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm3) while the C.V. is same on weight basis (i.e., kcal/kg) ? |
| A. | Propane and acetylene |
| B. | Propane and LPG |
| C. | Sewage gas and gobar gas |
| D. | B.F gas and coke oven gas |
| Answer» E. | |
| 6319. |
Scaling occurs in boiler tubes due to the fact that, the solubility of Ca(OH)2 __________ with increasing temperature. |
| A. | increases |
| B. | decreases |
| C. | shows inversion of solubility |
| D. | none of these |
| Answer» B. decreases | |
| 6320. |
While the recrystallisation temperature for pure metals is 0.3 Tm, the same for alloys is equal to __________ x Tm (where, Tm Melting temperature). |
| A. | 0.25 |
| B. | 0.45 |
| C. | 0.70 |
| D. | 0.95 |
| Answer» D. 0.95 | |
| 6321. |
The factor of safety for brittle materials (having elongation < 5%) is based on the __________ stress. |
| A. | yield |
| B. | proof |
| C. | ultimate |
| D. | none of these |
| Answer» D. none of these | |
| 6322. |
Carburettor in a spark ignition engine is used to |
| A. | mix air-fuel in the desired ratio. |
| B. | maintain a constant speed at varying loads. |
| C. | adjust the stroke length. |
| D. | increase the compression ratio. |
| Answer» B. maintain a constant speed at varying loads. | |
| 6323. |
Heat treatment of steel is done to mainly change its __________ properties. |
| A. | physical |
| B. | chemical |
| C. | mechanical |
| D. | surface |
| Answer» D. surface | |
| 6324. |
Thermal shock produced by cooling is more dengerous/deleterious than that produced by heating a surface, because of the reason that |
| A. | cooling produces tension on the surface. |
| B. | cooling produces compression on the surface. |
| C. | heating does not produces any thermal stress. |
| D. | heating produces compression on the surface. |
| Answer» B. cooling produces compression on the surface. | |
| 6325. |
Springs are not made of |
| A. | phospher bronze. |
| B. | nickel steel. |
| C. | monel. |
| D. | carbon steel (c 0.5%). |
| Answer» E. | |
| 6326. |
The Al2 O3 content of cryolite in Hall-Heroult's cell is maintained between __________ percent. |
| A. | 2-5 |
| B. | 18-20 |
| C. | 12-15 |
| D. | 6-12 |
| Answer» B. 18-20 | |
| 6327. |
Number of electrons in the outermost shell of a semi-conductor material is |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» E. | |
| 6328. |
The bulk modulus of a material with Poisson's ratio of 0.5 is equal to |
| A. | 3 x Young's modulus |
| B. | Young's modulus |
| C. | infinity |
| D. | zero |
| Answer» D. zero | |
| 6329. |
Compression ratio of an I.C. engine is the ratio of the |
| A. | clearance volume to the volume swept by piston per stroke. |
| B. | volume of air in cylinder before compression to that after compression. |
| C. | pressure after compression to that before compression. |
| D. | none of these |
| Answer» C. pressure after compression to that before compression. | |
| 6330. |
Two stroke engine compared to a four stroke engine has |
| A. | higher efficiency. |
| B. | less fuel consumption. |
| C. | higher power to weight ratio. |
| D. | lower initial cost. |
| Answer» D. lower initial cost. | |
| 6331. |
Ferrites are __________ magnetic. |
| A. | anti |
| B. | para |
| C. | ferri |
| D. | ferro |
| Answer» D. ferro | |
| 6332. |
The pH value is the measure of hydrogen ion concentration in a solution. The term pH stands for the __________ in the solution. |
| A. | power of hydrogen ion concentration |
| B. | percentage of hydrogen ions |
| C. | presence of hydrogen ions |
| D. | none of these |
| Answer» B. percentage of hydrogen ions | |
| 6333. |
The best criterion for analysing an economic investment is the |
| A. | rate of return criterion. |
| B. | present value method. |
| C. | salvage value. |
| D. | future value method. |
| Answer» B. present value method. | |
| 6334. |
Deformation band is absent in materials having __________ lattice crystal structure. |
| A. | fcc |
| B. | bcc |
| C. | hcp |
| D. | none of these |
| Answer» D. none of these | |
| 6335. |
Young's modulus of a material is the measure of its |
| A. | stiffness |
| B. | malleability |
| C. | creep resistance |
| D. | tensile strength |
| Answer» B. malleability | |
| 6336. |
Which of the following is not used as a bearing material ? |
| A. | Copper-lead alloys |
| B. | Babbits |
| C. | Bronzes |
| D. | Cermets |
| Answer» E. | |
| 6337. |
Brass parts with high residual tensile stress at the surface are susceptible to season cracking (i.e. spontaneous cracking occuring on exposure to atmospheric corrosion), if its zinc percentage is more than |
| A. | 5 |
| B. | 10 |
| C. | 20 |
| D. | 35 |
| Answer» D. 35 | |
| 6338. |
Water flow in the river during flood can be categorised as the __________ flow. |
| A. | unsteady uniform |
| B. | unsteady non-uniform |
| C. | steady uniform |
| D. | steady non-uniform |
| Answer» C. steady uniform | |
| 6339. |
Basicity [%Cao + %MgO/% SiO2) of the slag in Indian blast furnace is in the range of |
| A. | 0.7-1.0 |
| B. | 1.1-1.4 |
| C. | 1.5 - 1.8 |
| D. | 2.0 - 2.5 |
| Answer» C. 1.5 - 1.8 | |
| 6340. |
Boiler tube size is specified by its thickness and __________ diameter. |
| A. | outside |
| B. | inside |
| C. | mean |
| D. | none of these |
| Answer» B. inside | |
| 6341. |
Break even point represents the condition, when the company runs under no profit no loss condition. In break even analysis, total cost comprises of fixed cost |
| A. | only. |
| B. | plus variable cost. |
| C. | plus overhead cost. |
| D. | plus selling expenses. |
| Answer» C. plus overhead cost. | |
| 6342. |
The joint for soldering is supported by binding wire made of |
| A. | mild steel |
| B. | copper |
| C. | soft iron |
| D. | stainless steel |
| Answer» D. stainless steel | |
| 6343. |
The main reducing agent in iron blast furnace is |
| A. | carbon dioxide |
| B. | carbon monoxide |
| C. | oxygen |
| D. | air |
| Answer» C. oxygen | |
| 6344. |
With increase in temperature, the electrical conductivity of semiconductors |
| A. | increases. |
| B. | decreases. |
| C. | remain constant. |
| D. | either (a) or (b), depends on the type of semi-conductor. |
| Answer» B. decreases. | |
| 6345. |
Which of the, following is not associated with the functioning of a petrol engine ? |
| A. | Compression ignition system |
| B. | Spark plug |
| C. | Carburettor |
| D. | Otto cycle |
| Answer» B. Spark plug | |
| 6346. |
Minimum number of members required to form a Public Limited Joint Stock Com-pany is |
| A. | 7 |
| B. | 10 |
| C. | 12 |
| D. | 17 |
| Answer» B. 10 | |
| 6347. |
In an eutectic system, two elements are completely |
| A. | soluble in solid state. |
| B. | insoluble in liquid state. |
| C. | insoluble in both solid & liquid state. |
| D. | soluble in liquid state. |
| Answer» E. | |
| 6348. |
Which of the following is not a dielectric material ? |
| A. | Cotton, silk and paper. |
| B. | Asbestos, glass, porcelain and mica. |
| C. | Rubber and polymeric resins. |
| D. | All refractory materials. |
| Answer» D. All refractory materials. | |
| 6349. |
Magnetic permeability of iron is increased by its |
| A. | decarburising. |
| B. | alloying with cobalt. |
| C. | purification. |
| D. | alternate heating & cooling. |
| Answer» C. purification. | |
| 6350. |
The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as |
| A. | rigid |
| B. | tough |
| C. | ductile |
| D. | plastic |
| Answer» D. plastic | |