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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.
| 4001. |
The cam and follower is an example of |
| A. | sliding pair |
| B. | rolling pair |
| C. | lower pair |
| D. | higher pair |
| Answer» E. | |
| 4002. |
For an involute gear, the ratio of base circle radius and pitch circle radius is equal to |
| A. | sin |
| B. | cos |
| C. | sec |
| D. | cosec |
| Answer» C. sec | |
| 4003. |
An error of 1% in measuring head over the crest 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. | |
| 4004. |
A flow through a long pipe at decreasing rate is called __________ uniform flow. |
| A. | steady |
| B. | unsteady |
| Answer» C. | |
| 4005. |
The surface tension of mercury at normal temperature is __________ that of water. |
| A. | same as |
| B. | lower than |
| C. | higher than |
| Answer» D. | |
| 4006. |
The metacentric height of a ship is 0.6 m and the radius of gyration is 4 m. The time of rolling of a ship is |
| A. | 4.1 s |
| B. | 5.2 s |
| C. | 10.4 s |
| D. | 14.1 s |
| Answer» D. 14.1 s | |
| 4007. |
A differential manometer is used to measure |
| A. | atmospheric pressure |
| B. | pressure in pipes and channels |
| C. | pressure in venturimeter |
| D. | difference of pressures between two points in a pipe |
| Answer» E. | |
| 4008. |
The point at which the resultant pressure on an immersed surface acts, is known as |
| A. | centre of gravity |
| B. | centre of depth |
| C. | centre of pressure |
| D. | centre of immersed surface |
| Answer» D. centre of immersed surface | |
| 4009. |
A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to bring the liquid level from H1 to H2 will be |
| A. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/162-164-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/162-163-1.png"> |
| C. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/162-163-2.png"> |
| D. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/162-163-3.png"> |
| Answer» D. <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/162-163-3.png"> | |
| 4010. |
The torque required to overcome viscous resistance of a collar bearing is (where R1 and R2 = External and internal radius of collar) |
| A. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/179-350-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/179-350-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/179-350-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/179-350-4.png"> |
| Answer» E. | |
| 4011. |
Falling drops of water become spheres due to the property of |
| A. | surface tension of water |
| B. | compressibility of water |
| C. | capillarity of water |
| D. | viscosity of water |
| Answer» B. compressibility of water | |
| 4012. |
The D-Alembert's principle is used for changing the dynamic equilibrium of a fluid mass, into a static equilibrium. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 4013. |
Whenever a plate is held immersed at some angle with the direction of flow of the liquid, it is subjected to some pressure. The component of this pressure, in the direction of flow of the liquid, is known as |
| A. | lift |
| B. | drag |
| C. | stagnation pressure |
| D. | bulk modulus |
| Answer» C. stagnation pressure | |
| 4014. |
The total energy of a liquid particle in motion is equal to |
| A. | pressure energy + kinetic energy + potential energy |
| B. | pressure energy - (kinetic energy + potential energy) |
| C. | potential energy - (pressure energy + kinetic energy |
| D. | kinetic energy - (pressure energy + potential energy) |
| Answer» B. pressure energy - (kinetic energy + potential energy) | |
| 4015. |
The height of a water column equivalent to a pressure of 0.15 MPa is |
| A. | 15.3 m |
| B. | 25.3 m |
| C. | 35.3 m |
| D. | 45.3 m |
| Answer» B. 25.3 m | |
| 4016. |
The power transmitted through the nozzle is maximum when the head lost due to friction in the pipe is __________ of the total supply head. |
| A. | one-half |
| B. | one-third |
| C. | two-third |
| Answer» C. two-third | |
| 4017. |
If a body floating in a liquid does not return back to its original position, and heels farther "away when given a small angular displacement, the body is said to be in neutral equilibrium. |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 4018. |
The length of the divergent cone in a venturimeter is __________ that of the convergent cone. |
| A. | equal to |
| B. | double |
| C. | three to four times |
| D. | five to six times |
| Answer» D. five to six times | |
| 4019. |
A flow through a long pipe at constant rate is called |
| A. | steady uniform flow |
| B. | steady non-uniform flow |
| C. | unsteady uniform flow |
| D. | unsteady non-uniform flow |
| Answer» B. steady non-uniform flow | |
| 4020. |
In an external or internal mouthpiece, the absolute pressure head at vena contracta is zero when atmospheric pressure head is 10.3 m of water. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 4021. |
The shear stress-strain graph for a newtonian fluid is a |
| A. | straight line |
| B. | parabolic curve |
| C. | hyperbolic curve |
| D. | elliptical |
| Answer» B. parabolic curve | |
| 4022. |
If a pitot tube is placed with its nose upstream, downstream or sideways, the reading will be the same in every case. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4023. |
A flow in which each liquid particle does not have a definite path and the paths of individual particles also cross each other, is called turbulent flow. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 4024. |
A flow in which the viscosity of fluid is dominating over the inertia force is called |
| A. | steady flow |
| B. | unsteady flow |
| C. | laminar flow |
| D. | turbulent flow |
| Answer» D. turbulent flow | |
| 4025. |
An air vessel is provided at the summit in a syphon to |
| A. | avoid interruption in the flow |
| B. | increase discharge |
| C. | increase velocity |
| D. | maintain pressure difference |
| Answer» B. increase discharge | |
| 4026. |
The velocity at which the laminar flow stops, is known as |
| A. | velocity of approach |
| B. | lower critical velocity |
| C. | higher critical velocity |
| D. | none of these |
| Answer» C. higher critical velocity | |
| 4027. |
When a cylindrical vessel, containing some liquid, is rotated about its vertical axis, the liquid surface is depressed down at the axis of its rotation and rises up near the walls of the vessel on all sides. This type of flow is known as |
| A. | steady flow |
| B. | turbulent flow |
| C. | vortex flow |
| D. | uniform flow |
| Answer» D. uniform flow | |
| 4028. |
The Newton's law of resistance is based on the assumption that the |
| A. | planes of the body are completely smooth |
| B. | space around the body is completely filled with the fluid |
| C. | fluid particles do not exert any influence on one another |
| D. | all of the above |
| Answer» E. | |
| 4029. |
The Euler's equation for the motion of liquids is based upon the assumption that |
| A. | the fluid is non - viscous, homogeneous and incompressible |
| B. | the velocity of flow is uniform over the section |
| C. | the flow is continuous, steady and along the stream line |
| D. | all of the above |
| Answer» E. | |
| 4030. |
A weir is usually made of masonry or concrete. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 4031. |
A glass tube of smaller diameter is used while performing an experiment for the capillary rise of water because |
| A. | it is easier to see through the glass tube |
| B. | glass tube is cheaper than a metallic tube |
| C. | it is not possible to conduct this experiment with any other tube |
| D. | all of the above |
| Answer» B. glass tube is cheaper than a metallic tube | |
| 4032. |
The velocity of a body moving with simple harmonic motion is __________ at the mean position. |
| A. | zero |
| B. | minimum |
| C. | maximum |
| Answer» D. | |
| 4033. |
If the pressure angle is __________ , a reciprocating follower will jam in its bearings. |
| A. | too small |
| B. | too large |
| Answer» C. | |
| 4034. |
The D-slide valve is also known as |
| A. | inside admission valve |
| B. | outside admission valve |
| C. | piston slide valve |
| D. | none of these |
| Answer» C. piston slide valve | |
| 4035. |
When the load on the engine increases, it becomes necessary to increase the supply of working fluid and when the load decreases, less working fluid is required. The supply of the working fluid to the engine is controlled by a |
| A. | D-slide valve |
| B. | governor |
| C. | Meyer's expansion valve |
| D. | flywheel |
| Answer» C. Meyer's expansion valve | |
| 4036. |
V-belts are usually used for |
| A. | long drives |
| B. | short drives |
| C. | long and short drives |
| D. | none of these |
| Answer» C. long and short drives | |
| 4037. |
The two parallel and coplaner shafts are connected by gears having teeth parallel to the axis of the shaft. This arrangement is known as |
| A. | spur gearing |
| B. | helical gearing |
| C. | bevel gearing |
| D. | spiral gearing |
| Answer» B. helical gearing | |
| 4038. |
Sensitiveness of the governor is defined as the ratio of the |
| A. | mean speed to the maximum equilibrium speed |
| B. | mean speed to the minimum equilibrium speed |
| C. | difference of the maximum and minimum equilibrium speeds to the mean speed |
| D. | sum of the maximum and minimum equilibrium speeds to the mean speed |
| Answer» D. sum of the maximum and minimum equilibrium speeds to the mean speed | |
| 4039. |
In a pantograph, all the pairs are |
| A. | turning pairs |
| B. | sliding pairs |
| C. | spherical pairs |
| D. | self-closed pairs |
| Answer» B. sliding pairs | |
| 4040. |
The Klein's diagram is used when |
| A. | crank has uniform angular velocity |
| B. | crank has non-uniform angular velocity |
| C. | crank has uniform angular accleration |
| D. | crank has non-uniform angular acceleration |
| Answer» B. crank has non-uniform angular velocity | |
| 4041. |
The minimum periodic time of a compound pendulum is |
| A. | <img src="/_files/images/mechanical-engineering/theory-of-machines/478-99-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/theory-of-machines/478-99-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/theory-of-machines/478-99-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/theory-of-machines/478-99-4.png"> |
| Answer» E. | |
| 4042. |
An imaginary circle which by pure rolling action, gives the same motion as the actual gear, is called |
| A. | addendum circle |
| B. | dedendum circle |
| C. | pitch circle |
| D. | clearance circle |
| Answer» D. clearance circle | |
| 4043. |
The natural frequency of free transverse vibrations is same as that of free longitudinal vibrations. |
| A. | Right |
| B. | Wrong |
| Answer» B. Wrong | |
| 4044. |
A mechanism consisting of more than four links is called a compound mechanism. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4045. |
The throw of the eccentric is equal to the valve travel. |
| A. | Correct |
| B. | Incorrect |
| Answer» C. | |
| 4046. |
The addendum is the radial distance of tooth from the pitch circle to the top of the tooth. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 4047. |
In a turning moment diagram, the variations of energy above and below the mean resisting torque line is called |
| A. | fluctuation of energy |
| B. | maximum fluctuation of energy |
| C. | coefficient of fluctuation of energy |
| D. | none of these |
| Answer» B. maximum fluctuation of energy | |
| 4048. |
In a shaper mechanism, the coriolis component of acceleration does not exist. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4049. |
The primary unbalanced force is maximum __________ in one revolution of the crank. |
| A. | twice |
| B. | four times |
| C. | eight times |
| D. | sixteen times |
| Answer» B. four times | |
| 4050. |
The instantaneous centres which vary with the configuration of mechanism, are called |
| A. | permanent instantaneous centres |
| B. | fixed instantaneous centres |
| C. | neither fixed nor permanent instantaneous centres |
| D. | none of the above |
| Answer» D. none of the above | |