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MCQOPTIONS
This section includes 4791 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 2551. |
The thermodynamic property of a system is said to be an intensive property whose value for the entire system __________ the sum of their value for the individual parts of the system. |
| A. | is equal to |
| B. | is not equal to |
| Answer» C. | |
| 2552. |
The total energy of a molecule is shared equally by the various degrees of freedom possessed by it. This law is known as |
| A. | law of equipartition of energy |
| B. | law of conservation of energy |
| C. | law of degradation of energy |
| D. | none of these |
| Answer» B. law of conservation of energy | |
| 2553. |
The entropy of water at 0 C is assumed to be |
| A. | 1 |
| B. | 0 |
| C. | -1 |
| D. | 10 |
| Answer» C. -1 | |
| 2554. |
The greater the pressure difference in throttling, the lesser is the irreversibility. |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 2555. |
During which of the following process does heat rejection takes place in Carnot cycle? |
| A. | Isothermal expansion |
| B. | Isentropic expansion |
| C. | Isothermal compression |
| D. | Isentropic compression |
| Answer» D. Isentropic compression | |
| 2556. |
The fuel mostly used in steam boilers is |
| A. | brown coal |
| B. | peat |
| C. | coking bituminous coal |
| D. | non-coking bituminous coal |
| Answer» E. | |
| 2557. |
The free expansion process is a constant enthalpy process. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 2558. |
The hyperbolic pocess is governed by |
| A. | Boyle's law |
| B. | Charles' law |
| C. | Gay-Lussac law |
| D. | Avogadro's law |
| Answer» B. Charles' law | |
| 2559. |
The change of entropy, when heat is removed from the gas, is negative. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 2560. |
According to Kelvin-Planck's statement of second law of thermodynamics, |
| A. | it is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work |
| B. | it is possible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work |
| C. | it is impossible to construct a device which operates in a cyclic process and produces no effect other than the transfer of heat from a cold body to a hot body |
| D. | none of the above |
| Answer» B. it is possible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work | |
| 2561. |
Coke is produced |
| A. | when coal is first dried and then crushed to a fine powder by pulverising machine |
| B. | from the finely ground coal by moulding under pressure with or without a binding material |
| C. | when coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel |
| D. | by heating wood with a limited supply of air to a temperature not less than 280 C |
| Answer» D. by heating wood with a limited supply of air to a temperature not less than 280 C | |
| 2562. |
In an irreversible process, there is a |
| A. | loss of heat |
| B. | no loss of heat |
| C. | gain of heat |
| D. | no gain of heat |
| Answer» B. no loss of heat | |
| 2563. |
For the same compression ratio, the efficiency of dual combustion cycle is |
| A. | greater than Diesel cycle and less than Otto cycle |
| B. | less than Diesel cycle and greater than Otto cycle |
| C. | greater than Diesel cycle |
| D. | less than Diesel cycle |
| Answer» B. less than Diesel cycle and greater than Otto cycle | |
| 2564. |
Which of the following gas has a minimum molecular mass? |
| A. | Oxygen |
| B. | Nitrogen |
| C. | Hydrogen |
| D. | Methane |
| Answer» D. Methane | |
| 2565. |
In a plain milling cutter, the chip space between the back of one tooth and the face of the next tooth is called |
| A. | face |
| B. | fillet |
| C. | gash |
| D. | land |
| Answer» D. land | |
| 2566. |
In which of the following machine, the work rotates and the tool is stationary? |
| A. | Vertical boring machine |
| B. | Horizontal boring machine |
| C. | Precision boring machine |
| D. | Jig boring machine |
| Answer» B. Horizontal boring machine | |
| 2567. |
The cutting speed is zero at the periphery and it is maximum at the centre of the drill. |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 2568. |
In metal cutting operations, chips are formed due to plastic deformation of the metal. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 2569. |
The process of changing the shape of grinding wheel as it becomes worn due to breaking away of the abrasive and bond, is called |
| A. | truing |
| B. | dressing |
| C. | facing |
| D. | clearing |
| Answer» B. dressing | |
| 2570. |
Which of the following statement is wrong as regard to down milling? |
| A. | It can not be used on old machines due to backlash between the feed screw of the table and the nut. |
| B. | The chips are disposed off easily and do not interfere with the cutting. |
| C. | The surface milled appears to be slightly wavy. |
| D. | The coolant can be poured directly at the cutting zone where the cutting force is maximum. |
| Answer» D. The coolant can be poured directly at the cutting zone where the cutting force is maximum. | |
| 2571. |
The lathe centres are provided with standard taper known as |
| A. | Morse taper |
| B. | Seller's taper |
| C. | Chapman taper |
| D. | Brown and Sharpe taper |
| Answer» B. Seller's taper | |
| 2572. |
The lip clearance angle is the angle formed by the |
| A. | leading edge of the land with a plane having the axis of the drill |
| B. | flank and a plane at right angles to the drill axis |
| C. | chisel edge and the lip as viewed from the end of a drill |
| D. | none of the above |
| Answer» C. chisel edge and the lip as viewed from the end of a drill | |
| 2573. |
In a plain milling cutter, the portion of the gash adjacent to the cutting edge on which the chip impinges is called |
| A. | face |
| B. | fillet |
| C. | land |
| D. | lead |
| Answer» B. fillet | |
| 2574. |
In reaming process |
| A. | metal removal rate is high |
| B. | high surface finish is obtained |
| C. | high form accuracy is obtained |
| D. | high dimensional accuracy is obtained |
| Answer» D. high dimensional accuracy is obtained | |
| 2575. |
Flank wear occurs mainly on the |
| A. | nose part, front relief face and side relief face of the cutting tool |
| B. | face of the cutting tool at a short distance from the cutting edge |
| C. | cutting edge only |
| D. | front face only |
| Answer» B. face of the cutting tool at a short distance from the cutting edge | |
| 2576. |
The infeed grinding is similar to plunge grinding. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 2577. |
The plain milling machine is more rigid and heavier in construction than a universal milling machine of the same size. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 2578. |
Internal or external threads of different pitches can be produced by |
| A. | pantograph milling machine |
| B. | profiling machine |
| C. | planetary milling machine |
| D. | piano-miller |
| Answer» D. piano-miller | |
| 2579. |
Which of the following statement is correct about EDM machining? |
| A. | It can machine hardest materials. |
| B. | It produces high degree of surface finish. |
| C. | The tool and work are never in contact with each other. |
| D. | all of these |
| Answer» E. | |
| 2580. |
An operation of embossing a diamond shaped pattern on the surface of a workpiece, is known as |
| A. | counter-boring |
| B. | grooving |
| C. | knurling |
| D. | facing |
| Answer» D. facing | |
| 2581. |
The grooving is an operation of |
| A. | bevelling the extreme end of a workpiece |
| B. | embossing a diamond shaped pattern on the surface of a workpiece |
| C. | reducing the diameter of a workpiece over a very narrow surface |
| D. | enlarging the end of a hole cylindrically |
| Answer» D. enlarging the end of a hole cylindrically | |
| 2582. |
The structure of a grinding wheel depends upon |
| A. | hardness of the material being ground |
| B. | nature of the grinding operation |
| C. | finish required |
| D. | all of these |
| Answer» E. | |
| 2583. |
Cutting fluids are used to |
| A. | cool the tool |
| B. | improve surface finish |
| C. | cool the workpiece |
| D. | all of these |
| Answer» E. | |
| 2584. |
Spot facing is an operation of smoothing and squaring the surface around a hole. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2585. |
Lathe bed is made of |
| A. | mild steel |
| B. | alloy steel |
| C. | pig iron |
| D. | chilled cast iron |
| Answer» E. | |
| 2586. |
For turning internal tapers, the suitable method is |
| A. | by a form tool |
| B. | by setting over the tail stock |
| C. | by a taper turning attachment |
| D. | by swivelling the compound rest |
| Answer» D. by swivelling the compound rest | |
| 2587. |
A better machinable metal is one which gives |
| A. | lower chip-tool contact area and larger shear angle |
| B. | higher chip-tool contact area and smaller shear angle |
| C. | lower chip-tool contact area and smaller shear angle |
| D. | higher chip-tool contact area and larger shear angle |
| Answer» B. higher chip-tool contact area and smaller shear angle | |
| 2588. |
An operation of enlarging the end of a hole cylindrically is known as grooving. |
| A. | Correct |
| B. | Incorrect |
| Answer» C. | |
| 2589. |
Which of the following statement is correct about hot machining? |
| A. | It requires less power than machining metals at room temperature. |
| B. | The rate of tool wear is lower. |
| C. | It is used for machining high strength and high temperature resistant materials. |
| D. | all of the above |
| Answer» E. | |
| 2590. |
In drilling bakellite and fibrous plastics, the point angle of a drill is |
| A. | 90 |
| B. | 118 |
| C. | 135 |
| D. | 150 |
| Answer» B. 118 | |
| 2591. |
The shear velocity is the velocity of |
| A. | tool relative to the workpiece |
| B. | chip relative to the tool |
| C. | tool along the tool face |
| D. | none of these |
| Answer» E. | |
| 2592. |
In centreless grinders, the regulating wheel is inclined at |
| A. | 0 to 8 |
| B. | 9 to 15 |
| C. | 16 to 20 |
| D. | 21 to 25 |
| Answer» B. 9 to 15 | |
| 2593. |
A grinding wheel is said to be of __________ if the abrasive grains can be easily dislodged. |
| A. | soft grade |
| B. | medium grade |
| C. | hard grade |
| Answer» B. medium grade | |
| 2594. |
Which of the following statement is correct in regard to centreless grinding? |
| A. | The workpiece is supported throughout its entire length as grinding takes place. |
| B. | It is a continuous process and adopted for production work. |
| C. | It requires no holding device for the work. |
| D. | all of the above |
| Answer» E. | |
| 2595. |
The specific cutting energy used for establishing the machinability of the metal depends upon its |
| A. | coefficient of friction |
| B. | microstructure |
| C. | work hardening characteristics |
| D. | all of these |
| Answer» E. | |
| 2596. |
The form grinding is used to grind gear teeth, threads, splined shafts and holes. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 2597. |
In a shaper, the metal is removed during |
| A. | forward stroke |
| B. | return stroke |
| C. | both the forward and return strokes |
| D. | neither the forward nor the return stroke |
| Answer» B. return stroke | |
| 2598. |
In __________ operation, the chip thickness is minimum at the beginning of the cut and it reaches to the maximum when the cut terminates. |
| A. | conventional milling |
| B. | climb milling |
| C. | face milling |
| D. | end milling |
| Answer» B. climb milling | |
| 2599. |
The aluminium oxide abrasive is chiefly used for grinding |
| A. | high speed steel |
| B. | carbon steel |
| C. | wrought iron |
| D. | all of these |
| Answer» E. | |
| 2600. |
For turning small taper on long workpiece, the suitable method is |
| A. | by a form tool |
| B. | by setting over the tail stock |
| C. | by a taper turning attachment |
| D. | by swivelling the compound rest |
| Answer» C. by a taper turning attachment | |