MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 2670 Mcqs, each offering curated multiple-choice questions to sharpen your Railways knowledge and support exam preparation. Choose a topic below to get started.
| 1601. |
The property of the material due to which the maximum amount of energy stored in a material upto fracture limit is called as: |
| A. | Hardness |
| B. | Resilience |
| C. | Plasticity |
| D. | Toughness |
| Answer» E. | |
| 1602. |
Tangent of angle of friction is equal to: |
| A. | kinetic friction |
| B. | Limiting friction |
| C. | Frictional force |
| D. | coefficient of friction |
| Answer» E. | |
| 1603. |
The property due to which the material can be converted into thin sheets is known as : |
| A. | Ductility |
| B. | Malleability |
| C. | Hardness |
| D. | Resilience |
| Answer» C. Hardness | |
| 1604. |
The quantity, which is equal to rate of change of momentum is known to be: |
| A. | Force |
| B. | Acceleration |
| C. | Impulse |
| D. | displacement |
| Answer» B. Acceleration | |
| 1605. |
The unit of moment is: |
| A. | \[N-m\] |
| B. | \[N/m\] |
| C. | \[N/{{m}^{2}}\] |
| D. | \[N/{{m}^{4}}\] |
| Answer» B. \[N/m\] | |
| 1606. |
In a stress strain curve, the area under stress strain curve upto fracture shows which of the following property: |
| A. | Hardness |
| B. | Ductility |
| C. | Toughness |
| D. | Brittleness |
| Answer» D. Brittleness | |
| 1607. |
In S.I. system of units, the unit for strain is : |
| A. | Pa |
| B. | KPa |
| C. | GPa |
| D. | None of these |
| Answer» E. | |
| 1608. |
Free Body diagram shows: |
| A. | No forces are acting of the body |
| B. | All the internal forces acting on the body |
| C. | All the internal and external forces acting on the body |
| D. | None of these |
| Answer» D. None of these | |
| 1609. |
The property due to which the material can be drawn into thin wires is knows as: |
| A. | Malleability |
| B. | brittleness |
| C. | Ductility |
| D. | Elasticity |
| Answer» D. Elasticity | |
| 1610. |
True stress is associated with : |
| A. | Instantaneous cross - sectional area |
| B. | Average cross - sectional area |
| C. | Original cross - sectional area |
| D. | Final cross - sectional area |
| Answer» B. Average cross - sectional area | |
| 1611. |
If \[{{\sigma }_{T}}=\]= True stress,\[{{\sigma }_{C}}\]conventional stress, then their relationship is represented by: where \[\varepsilon \]= strain |
| A. | \[\frac{{{\sigma }_{T}}}{{{\sigma }_{c}}}=1-\varepsilon \] |
| B. | \[\frac{{{\sigma }_{T}}}{{{\sigma }_{c}}}=\varepsilon \] |
| C. | \[\frac{{{\sigma }_{c}}}{{{\sigma }_{T}}}=\varepsilon \] |
| D. | \[\frac{{{\sigma }_{T}}}{{{\sigma }_{c}}}=1+\varepsilon \] |
| Answer» E. | |
| 1612. |
If the length of the column is doubled, the value of critical load becomes: |
| A. | \[\frac{1}{2}\times \]original value |
| B. | \[\frac{1}{8}\times \]original value |
| C. | \[\frac{1}{4}\times \]original value |
| D. | \[\frac{1}{16}\times \]original value |
| Answer» D. \[\frac{1}{16}\times \]original value | |
| 1613. |
The point of contra flexure is found to be in which of the following beam? |
| A. | cantilever beam |
| B. | Simple supported beam |
| C. | overhanging beam |
| D. | None of these |
| Answer» D. None of these | |
| 1614. |
If \[{{\sigma }_{w}}=\] working stress, \[{{\sigma }_{w}}=\]ultimate stress then the which of the following relation is free? |
| A. | \[{{\sigma }_{w}}={{\sigma }_{u}}\] |
| B. | \[{{\sigma }_{w}}<{{\sigma }_{u}}\] |
| C. | \[{{\sigma }_{w}}>{{\sigma }_{u}}\] |
| D. | None of these |
| Answer» C. \[{{\sigma }_{w}}>{{\sigma }_{u}}\] | |
| 1615. |
Poisson's ratio generally depends on: |
| A. | Material of specimen |
| B. | Area of cross section |
| C. | Magnitude of load |
| D. | None of these |
| Answer» B. Area of cross section | |
| 1616. |
Percentage elongation is associated with which of the following terms during tensile test? |
| A. | Malleability |
| B. | creep |
| C. | Hardness |
| D. | ductility |
| Answer» E. | |
| 1617. |
Stiffness is measured in which of the following: |
| A. | Modulus of elasticity |
| B. | Toughness |
| C. | density |
| D. | ultimate strength |
| Answer» B. Toughness | |
| 1618. |
In case of a continous beam, which of the following statement is true? |
| A. | It has two supports at ends only |
| B. | It has less than two supports |
| C. | It has more than two supports |
| D. | None of these |
| Answer» D. None of these | |
| 1619. |
Neutral plane of a beam is defined as the plane: |
| A. | whose length changes during deformation |
| B. | whose length does not change during deformation |
| C. | which lies at top most layer |
| D. | None of these |
| Answer» C. which lies at top most layer | |
| 1620. |
If the forces are reduced on contacting surfaces, the value of friction: |
| A. | increases |
| B. | decreases |
| C. | remains constant |
| D. | None of these |
| Answer» C. remains constant | |
| 1621. |
Which of the following has given maximum shear stress theory: |
| A. | Rankins |
| B. | Tresea |
| C. | Mohr |
| D. | ST. venant |
| Answer» C. Mohr | |
| 1622. |
When the cyclic or repeated stresses are applied to the material, then its behaviour is termed as: |
| A. | creep |
| B. | fatigue |
| C. | stiffness |
| D. | endurance |
| Answer» C. stiffness | |
| 1623. |
Which of the following has given maximum principal stress theory |
| A. | Rankins |
| B. | Tresea |
| C. | ST. venant |
| D. | Mohr |
| Answer» B. Tresea | |
| 1624. |
The forces whose line of action lie on the same plane and also must at a point is known as |
| A. | co-planar non concurrent forces |
| B. | co-planar concurrent forces |
| C. | Non - coplanar concurrent forces |
| D. | Non - coplanar-Non concurrent forces |
| Answer» C. Non - coplanar concurrent forces | |
| 1625. |
Range of Poisson's ratio for steel is given by: |
| A. | \[0.21-0.22\] |
| B. | \[0.23-0.27\] |
| C. | \[0.37-0.43\] |
| D. | \[0.57-0.63\] |
| Answer» C. \[0.37-0.43\] | |
| 1626. |
In case of curved beams, the bending stresses are distributed in the shape of: |
| A. | Parabola |
| B. | ellipse |
| C. | circle |
| D. | Hyperbola |
| Answer» E. | |
| 1627. |
If L= original length of specimen, AL = Increase in length, then the strain (e) will be equal to: |
| A. | \[\frac{L}{\Delta L}\] |
| B. | \[L\times \Delta L\] |
| C. | \[\frac{\Delta L}{L}\] |
| D. | \[\frac{2L}{\Delta L}\] |
| Answer» D. \[\frac{2L}{\Delta L}\] | |
| 1628. |
A cylindrical elastic body subjected to pure torsion about its axis develops: |
| A. | compressive stress in a direction\[45{}^\circ \]to the axis |
| B. | shear stress in a direction \[45{}^\circ \]to the axis |
| C. | tensile stress in a direction \[45{}^\circ \]to the axis |
| D. | None of these |
| Answer» D. None of these | |
| 1629. |
Impact strength of a material represents: |
| A. | Hardness |
| B. | Resilience |
| C. | Ductility |
| D. | Toughness |
| Answer» E. | |
| 1630. |
According g to Hook's Law, stress is directly proportional to strain within: |
| A. | Plastic limit |
| B. | yield point |
| C. | elastic limit of proportionality |
| D. | None of these |
| Answer» D. None of these | |
| 1631. |
Torsion equation is given as: if\[\theta \]=maximum angle of twist, j= polar moment of inertia, \[{{T}_{r}}=\]Twisting moment,\[\phi =\]maximum shear angle \[=\frac{R\theta }{L}\] |
| A. | \[\frac{{{T}_{r}}}{J}=\frac{G\theta }{L}=\frac{{{\tau }_{\max }}}{R}\] |
| B. | \[\frac{J}{{{T}_{r}}}=\frac{G\theta }{L}=\frac{R}{{{\tau }_{\max }}}\] |
| C. | \[\frac{{{T}_{r}}}{L}=\frac{G\theta }{J}=\frac{{{\tau }_{\max }}}{R}\] |
| D. | \[\frac{{{T}_{r}}}{{{\tau }_{\max }}}=\frac{G\theta }{L}=\frac{J}{R}\] |
| Answer» B. \[\frac{J}{{{T}_{r}}}=\frac{G\theta }{L}=\frac{R}{{{\tau }_{\max }}}\] | |
| 1632. |
Newton's second law of motion states that: |
| A. | Rate of change of momentum is directly proportional to the impressed force and takes place in the direction of force acting |
| B. | Rate of change of momentum is inversely proportional to impressed force and takes place in the direction to opposite of force acting |
| C. | To every action there is always in equal and opposite reaction |
| D. | None of these |
| Answer» B. Rate of change of momentum is inversely proportional to impressed force and takes place in the direction to opposite of force acting | |
| 1633. |
If \[{{\sigma }_{1}}\],\[{{\sigma }_{2}}\]and\[{{\sigma }_{y}}\]are maximum principal stress, minimum principal stress and yield stress, then according to maximum shear stress theory, which of the following expression satisfies: |
| A. | \[{{\sigma }_{y}}={{\sigma }_{1}}+{{\sigma }_{2}}\] |
| B. | \[{{\sigma }_{y}}={{\sigma }_{1}}-{{\sigma }_{2}}\] |
| C. | \[{{\sigma }_{y}}={{\sigma }^{2}}_{1}+{{\sigma }^{2}}_{2}\] |
| D. | \[{{\sigma }_{y}}={{\sigma }^{2}}_{1}-{{\sigma }^{2}}_{2}\] |
| Answer» C. \[{{\sigma }_{y}}={{\sigma }^{2}}_{1}+{{\sigma }^{2}}_{2}\] | |
| 1634. |
A beam whose both ends are supported is known as : |
| A. | simply supported beam |
| B. | fixed beam |
| C. | overhanging beam |
| D. | continuous beam |
| Answer» B. fixed beam | |
| 1635. |
If\[{{P}_{R}}=\]Rankin's Load, \[{{P}_{E}}=\]crippling load by Euler's formula and \[{{P}_{C}}\]crushing load, then Rankin's formula for columns is given as: |
| A. | \[\frac{1}{{{P}_{E}}}=\frac{1}{{{P}_{R}}}+\frac{1}{{{P}_{C}}}\] |
| B. | \[\frac{1}{{{P}_{C}}}=\frac{1}{{{P}_{E}}}+\frac{1}{{{P}_{R}}}\] |
| C. | \[\frac{1}{{{P}_{R}}}=\frac{1}{{{P}_{E}}}-\frac{1}{{{P}_{C}}}\] |
| D. | \[\frac{1}{{{P}_{R}}}=\frac{1}{{{P}_{E}}}+\frac{1}{{{P}_{C}}}\] |
| Answer» E. | |
| 1636. |
A beam whose both ends are fixed rigidly into the supporting walls is called as : |
| A. | continuous beam |
| B. | fixed, beam |
| C. | cantilever beam |
| D. | None of these |
| Answer» C. cantilever beam | |
| 1637. |
Which of the following expressions represents Lami's theorem, if A, B, C are three are in equilibrium and as shown in figure. |
| A. | \[\frac{A}{\cos \alpha }=\frac{B}{\cos \beta }=\frac{C}{\cos \gamma }\] |
| B. | \[\frac{A}{\sin \alpha }=\frac{B}{\sin \beta }=\frac{C}{\sin \gamma }\] |
| C. | \[\frac{A}{{{\cos }^{2}}\alpha }=\frac{B}{{{\cos }^{2}}\beta }=\frac{C}{{{\cos }^{2}}\gamma }\] |
| D. | None of these |
| Answer» C. \[\frac{A}{{{\cos }^{2}}\alpha }=\frac{B}{{{\cos }^{2}}\beta }=\frac{C}{{{\cos }^{2}}\gamma }\] | |
| 1638. |
Which of the following is not an advantage of semi-conductor gauges as compared to conventional strain gauges? |
| A. | Excellent hysteresis characteristics |
| B. | Least sensitive to temperature changes |
| C. | High fatigue life |
| D. | Smaller size |
| Answer» C. High fatigue life | |
| 1639. |
In a two wattmeter method of measuring power in a 3-phase system one of the watt meters reads negative implying |
| A. | wattmeter connection is faulty |
| B. | load is unbalanced |
| C. | power flow is in the reverse direction |
| D. | power factor is less then 0.5 |
| Answer» E. | |
| 1640. |
Which of the following meter mechanisms is adaptable to a greater variety of measurement? |
| A. | Inclined coil |
| B. | Moving-iron vane |
| C. | Electrodynamometer |
| D. | Permanent magnet-moving coil |
| Answer» D. Permanent magnet-moving coil | |
| 1641. |
The errors mainly caused by human mistakes are |
| A. | Gross error |
| B. | Instrument error |
| C. | observational error |
| D. | Systematic error |
| Answer» B. Instrument error | |
| 1642. |
Tow voltmeters of\[0-300\,\,V\]range are connected in parallel to an ac circuit. One voltmeter is moving iron type and reads 200 V. If the other volmeter is moving coil type, its reading will be |
| A. | \[200\sqrt{3}\,\,V\] |
| B. | \[200~\times 1.41\,\,V\] |
| C. | slightly less than 200 V |
| D. | zero |
| Answer» E. | |
| 1643. |
Which of the following instruments used for the measurement of pressure? |
| A. | Bellows |
| B. | Diaphragms |
| C. | Fiber optic pressure sensors |
| D. | All of the above |
| Answer» E. | |
| 1644. |
Electrostatic instruments are generally used as |
| A. | Voltmeters |
| B. | Ammeters |
| C. | Watt meters |
| D. | Watt-hour meters |
| Answer» B. Ammeters | |
| 1645. |
Electrostatic voltmeter instruments are suitable for |
| A. | AC work only |
| B. | DC work only |
| C. | Both AC and DC work |
| D. | None of these |
| Answer» D. None of these | |
| 1646. |
In AC bridges, the Wagner earth devices are used to |
| A. | Remove all the earth capacitances from the bridge circuit |
| B. | Remove harmonics |
| C. | Reduce error caused by stray electric field |
| D. | All of the above |
| Answer» E. | |
| 1647. |
The earth resistance can be measured by |
| A. | Fall of potential method |
| B. | Using an earth tester |
| C. | Doctor ohmmeter method |
| D. | Only [a] and [b] |
| Answer» E. | |
| 1648. |
A liquid crystal display requires |
| A. | An AC drive |
| B. | A DC drive |
| C. | Both AC and DC drive |
| D. | None of the above |
| Answer» B. A DC drive | |
| 1649. |
Which devices used to measure the temperature of an object? |
| A. | Potentiometer |
| B. | Odometer |
| C. | Thermometers |
| D. | Galvanometer |
| Answer» D. Galvanometer | |
| 1650. |
An alternator is being synchronized to the bus bars of frequency 50 Hz. The synchroscope lamp flickers at a frequency of 5 Hz. The frequency of the alternator is |
| A. | 45 Hz |
| B. | 55 Hz |
| C. | 45 of 55 Hz |
| D. | none of the above |
| Answer» D. none of the above | |