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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.
| 501. |
According to Gay-Lussac law for a perfect gas, p/T = constant, if v is kept constant. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 502. |
There is no change in internal energy in an isothermal process. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 503. |
The most probable velocity of the gas molecules is given by |
| A. | <img src="/_files/images/mechanical-engineering/thermodynamics/247-163-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/thermodynamics/247-163-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/thermodynamics/247-163-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/thermodynamics/247-163-4.png"> |
| Answer» C. <img src="/_files/images/mechanical-engineering/thermodynamics/247-163-3.png"> | |
| 504. |
The processes occuring in open system which permit the transfer of mass to and from the system, are known as |
| A. | flow processes |
| B. | non-flow processes |
| C. | adiabatic processes |
| D. | none of these |
| Answer» B. non-flow processes | |
| 505. |
If the value of n = 0 in the equation pvn = C, then the process is called |
| A. | constant volume process |
| B. | adiabatic process |
| C. | constant pressure process |
| D. | isothermal process |
| Answer» D. isothermal process | |
| 506. |
Which of the following gas is mostly used in town for street and domestic lighting and heating? |
| A. | Producer gas |
| B. | Coal gas |
| C. | Mond gas |
| D. | Coke oven gas |
| Answer» C. Mond gas | |
| 507. |
The value of gas constant (R) in S. I. units is |
| A. | 0.287 J/kgK |
| B. | 2.87 J/kgK |
| C. | 28.7 J/kgK |
| D. | 287 J/kgK |
| Answer» E. | |
| 508. |
In the first law of thermodynamics, the total energy of the system remains constant. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 509. |
The efficiency of Diesel cycle increases with |
| A. | decrease in cut-off |
| B. | increase in cut-off |
| C. | constant cut-off |
| D. | none of these |
| Answer» B. increase in cut-off | |
| 510. |
Coal gas is obtained by mixing coal and gas at ambient conditions. |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 511. |
Stirling and Ericsson cycles are |
| A. | reversible cycles |
| B. | irreversible cycles |
| C. | semi-reversible cycles |
| D. | quasi-static cycles |
| Answer» B. irreversible cycles | |
| 512. |
A series of operations, which takes place in a certain order and restore the initial conditions at the end, is known as |
| A. | reversible cycle |
| B. | irreversible cycle |
| C. | thermodynamic cycle |
| D. | none of these |
| Answer» D. none of these | |
| 513. |
An isothermal process is governed by |
| A. | Boyle's law |
| B. | Charles' law |
| C. | Gay-Lussac law |
| D. | Avogadro's law |
| Answer» B. Charles' law | |
| 514. |
The specific heat of water is |
| A. | 1.817 |
| B. | 2512 |
| C. | 4.187 |
| D. | none of these |
| Answer» D. none of these | |
| 515. |
One kg of carbon monoxide requires __________ kg of oxygen to produce 11/7 kg of carbon dioxide gas. |
| A. | All |
| B. | 4/7 |
| C. | 11/4 |
| D. | 9/7 |
| Answer» C. 11/4 | |
| 516. |
The absolute zero temperature is taken as |
| A. | -273 C |
| B. | 273 C |
| C. | 237 F |
| D. | -237 F |
| Answer» B. 273 C | |
| 517. |
A weir is said to be broad crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest. |
| A. | equal to. |
| B. | less than |
| C. | more than |
| Answer» D. | |
| 518. |
The kinetic energy of molecules of a gas becomes zero at absolute zero temperature. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 519. |
A cycle consisting of one constant pressure, one constant volume and two isentropic processes is known as |
| A. | Carnot cycle |
| B. | Stirling cycle |
| C. | Otto cycle |
| D. | Diesel cycle |
| Answer» E. | |
| 520. |
An error of 1% in measuring head over the apex of the notch (H) will produce an error of __________ in discharge over a triangular notch. |
| A. | 1% |
| B. | 1.5% |
| C. | 2% |
| D. | 2.5% |
| Answer» E. | |
| 521. |
According to Avogadro's law, the density of any two gases is __________ their molecular masses, if the gases are at the same temperature and pressure. |
| A. | equal to |
| B. | directly proportional to |
| C. | inversely proportional to |
| Answer» C. inversely proportional to | |
| 522. |
The efficiency and work ratio of a simple gas turbine cycle are |
| A. | low |
| B. | very low |
| C. | high |
| D. | very high |
| Answer» C. high | |
| 523. |
The amount of heat required to raise the temperature of the unit mass of gas through one degree at constant volume, is called |
| A. | specific heat at constant volume |
| B. | specific heat at constant pressure |
| C. | kilo Joule |
| D. | none of these |
| Answer» B. specific heat at constant pressure | |
| 524. |
There is a loss of heat in an irreversible process. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 525. |
The body will sink down if the force of buoyancy is __________ the weight of the liquid displaced. |
| A. | equal to |
| B. | less than |
| C. | more than |
| Answer» C. more than | |
| 526. |
If a body floating in a liquid returns back to its original position, when given a small angular displacement, the body is said to be in |
| A. | neutral equilibrium |
| B. | stable equilibrium |
| C. | unstable equilibrium |
| D. | none of these |
| Answer» C. unstable equilibrium | |
| 527. |
In an external mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to 0.89 times the height of the liquid, above the vena contracta. |
| A. | less than |
| B. | more than |
| Answer» B. more than | |
| 528. |
In a venturimeter, the velocity of liquid at throat is __________ than at inlet. |
| A. | higher |
| B. | lower |
| Answer» B. lower | |
| 529. |
The value of bulk modulus of a fluid is required to determine |
| A. | Reynold's number |
| B. | Froude's number |
| C. | Mach number |
| D. | Euler's number |
| Answer» D. Euler's number | |
| 530. |
In a depressed nappe |
| A. | the pressure below the nappe is atmospheric |
| B. | the pressure below the nappe is negative |
| C. | the pressure above the nappe is atmospheric |
| D. | the pressure above the nappe is negative |
| Answer» C. the pressure above the nappe is atmospheric | |
| 531. |
In one dimensional flow, the flow |
| A. | is steady and uniform |
| B. | takes place in straight line |
| C. | takes place in curve |
| D. | takes place in one direction |
| Answer» C. takes place in curve | |
| 532. |
The kinematic viscosity is the |
| A. | ratio of absolute viscosity to the density of the liquid |
| B. | ratio of density of the liquid to the absolute viscosity |
| C. | product of absolute viscosity and density of the liquid |
| D. | product of absolute viscosity and mass of the liquid |
| Answer» B. ratio of density of the liquid to the absolute viscosity | |
| 533. |
PERT requires |
| A. | single time estimate |
| B. | double time estimate |
| C. | triple time estimate |
| D. | none of these |
| Answer» D. none of these | |
| 534. |
In big automobile repair shop, for elevating and moving the heavy parts such as complete engine assembly, gear box etc., an overhead crane and a fork lift truck is used. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 535. |
In break even analysis, total cost consists of |
| A. | fixed cost + sales revenue |
| B. | variable cost + sales revenue |
| C. | fixed cost + variable cost |
| D. | fixed cost + variable cost + profit |
| Answer» D. fixed cost + variable cost + profit | |
| 536. |
Direct expenses include |
| A. | factory expenses |
| B. | selling expenses |
| C. | administrative expenses |
| D. | none of these |
| Answer» E. | |
| 537. |
Which of the following type of layout is suitable for automobile manufacturing concern? |
| A. | product layout |
| B. | process layout |
| C. | fixed position layout |
| D. | combination layout |
| Answer» B. process layout | |
| 538. |
String diagram is used |
| A. | for checking the relative values of various layouts |
| B. | when a group of workers are working at a place |
| C. | where processes require the operator to be moved from one work place to another |
| D. | all of the above |
| Answer» E. | |
| 539. |
Representative time is the average of times recorded by work study man for an operation. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 540. |
Simplex method is the method used for |
| A. | value analysis |
| B. | network analysis |
| C. | linear programming |
| D. | queuing theory |
| Answer» D. queuing theory | |
| 541. |
Dispatching |
| A. | prescribes the sequence of operations to be followed |
| B. | determines the programme for the operations |
| C. | is concerned with the starting of processes |
| D. | regulates the progress of job through various processes |
| Answer» D. regulates the progress of job through various processes | |
| 542. |
Job evaluation is the method of determining the |
| A. | relative values of a job |
| B. | worker's performance on a job |
| C. | worth of the machine |
| D. | value of overall production |
| Answer» B. worker's performance on a job | |
| 543. |
Which of the following wage incentive plan guarantees minimum wage to a worker and bonus is paid for the fixed percentage of time saved? |
| A. | Halsey plan |
| B. | Gantt plan |
| C. | Rowan plan |
| D. | Emerson's efficiency plan |
| Answer» B. Gantt plan | |
| 544. |
The routing function in a production system design is concerned with |
| A. | manpower utilisation |
| B. | quality assurance of the product |
| C. | machine utilisation |
| D. | optimising material flow through the plant |
| Answer» D. optimising material flow through the plant | |
| 545. |
Work study involues |
| A. | only method study |
| B. | only work measurement |
| C. | method study and work measurement |
| D. | only motion study |
| Answer» D. only motion study | |
| 546. |
PERT analysis is based upon |
| A. | optimistic time |
| B. | pessimistic time |
| C. | most likely time |
| D. | all of these |
| Answer» E. | |
| 547. |
Work done is said to be zero, when |
| A. | some force acts on a body, but displacement is zero |
| B. | no force acts on a body but some displacement takes place |
| C. | either (a) or (b) |
| D. | none of the above |
| Answer» D. none of the above | |
| 548. |
The force which acts along the radius of a circle and directed away from the centre of the circle is called centrifugal force. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 549. |
One watt is equal to |
| A. | 0.1 joule/s |
| B. | 1 joule/s |
| C. | 10 joules/s |
| D. | 100 joules/s |
| Answer» C. 10 joules/s | |
| 550. |
two like parallel forces are acting at a distance of 24 mm apart and their resultant is 20 N. It the line of action of the resultant is 6 mm from any given force, the two forces are |
| A. | 15 N and 5 N |
| B. | 20 N and 5 N |
| C. | 15 N and 15 N |
| D. | none of these |
| Answer» B. 20 N and 5 N | |