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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.
| 4101. |
In case of flow through parallel pipes, |
| A. | the head loss for all the pipes is same |
| B. | the total discharge is equal to the sum of discharges in the various pipes |
| C. | the total head loss is the sum of head losses in the various pipes |
| D. | Both (A) and (B) |
| Answer» E. | |
| 4102. |
The torque required to overcome viscous resistance of a footstep bearing is (where = Viscosity of the oil, N = Speed of the shaft, R = Radius of the shaft, and t = Thickness of the oil film) |
| A. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/179-348-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/179-348-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/179-348-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/179-348-4.png"> |
| Answer» E. | |
| 4103. |
Coefficient of velocity is defined as the ratio of |
| A. | actual velocity of jet at vena contracta to the theoretical velocity |
| B. | area of jet at vena contracta to the area of orifice |
| C. | actual discharge through an orifice to the theoretical discharge |
| D. | none of the above |
| Answer» B. area of jet at vena contracta to the area of orifice | |
| 4104. |
A chain consisting of four links and four joints is called a kinematic chain. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 4105. |
Which of the following is an open pair? |
| A. | Ball and socket joint |
| B. | Journal bearing |
| C. | Lead screw and nut |
| D. | Cam and follower |
| Answer» E. | |
| 4106. |
The frictional torque transmitted in a flat pivot bearing with assumption of uniform pressure is __________ as compared to uniform wear. |
| A. | less |
| B. | more |
| C. | same |
| Answer» C. same | |
| 4107. |
The motion of a D-slide valve in a steam engine is simple harmonic. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 4108. |
In cross compounding, the cylinders are arranged |
| A. | side by side and each cylinder has common piston, connecting rod and crank |
| B. | side by side and each cylinder has separate piston, connecting rod and crank |
| C. | at 90 and each cylinder has common piston, connecting rod and crank |
| D. | at 90 and each cylinder has separate piston, connecting rod and crank |
| Answer» C. at 90 and each cylinder has common piston, connecting rod and crank | |
| 4109. |
A single ended Scotch marine steam boiler may have one to four furnaces which enter from front end of the boiler. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 4110. |
The high steam and low water safety valve is used to blow off steam when the |
| A. | steam pressure exceeds the working pressure |
| B. | water level in the boiler becomes too low |
| C. | both (a) and (b) |
| D. | none of the above |
| Answer» D. none of the above | |
| 4111. |
According to Darcy's formula, the loss of head due to friction in the pipe is (where f = Darcy's coefficient, l = Length of pipe, v = Velocity of liquid in pipe, and d = Diameter of pipe) |
| A. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/168-232-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/168-232-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/168-232-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/168-232-4.png"> |
| Answer» B. <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/168-232-2.png"> | |
| 4112. |
The property of a liquid which enables it to resist tensile stress is called its surface tension. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 4113. |
The discharge over the trapezoidal notch is equal to the discharge over the rectangular notch __________ the discharge over the triangular notch. |
| A. | plus |
| B. | minus |
| Answer» B. minus | |
| 4114. |
A glass tube of small diameter (d) is dipped in fluid. The height of rise or fall in the tube given by (where w = Specific weight of liquid, = Angle of contact of the liquid surface, and = Surface tension) |
| A. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/149-24-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/149-24-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/149-24-3u.png"> |
| D. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/149-24-4.png"> |
| Answer» D. <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/149-24-4.png"> | |
| 4115. |
A compound steam engine in which the high pressure and low pressure cylinders have common piston rod, is called |
| A. | receiver type compound engine |
| B. | Tandem type compound engine |
| C. | Woolf type compound engine |
| D. | none of these |
| Answer» C. Woolf type compound engine | |
| 4116. |
An economiser is used to increase the temperature of saturated steam without raising its pressure. |
| A. | Correct |
| B. | Incorrect |
| Answer» C. | |
| 4117. |
Besides mean effective pressure, the data required to determine the indicated power of an engine include |
| A. | piston diameter, length of stroke and calorific value of fuel |
| B. | piston diameter, specific fuel consumption and Calorific value of fuel |
| C. | piston diameter, length of stroke and speed of rotation |
| D. | specific fuel consumption, speed of rotation and torque |
| Answer» D. specific fuel consumption, speed of rotation and torque | |
| 4118. |
When the connection between the elements forming a pair is such that the constrained motion is not completed by itself, but by some other means, the motion is said to be a completely constrained motion, |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 4119. |
In order to check the clearance between two mating surfaces, a __________ gauge should be used. |
| A. | ring |
| B. | plug |
| C. | feeler |
| Answer» D. | |
| 4120. |
When the weld is made from left to right, it is known as back-hand welding. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 4121. |
The current in electric resistance welding can be regulated by |
| A. | varying the input supply |
| B. | changing the primary turns of the transformer |
| C. | changing the secondary turns of the transformer |
| D. | any one of the above |
| Answer» C. changing the secondary turns of the transformer | |
| 4122. |
In a cold chamber die casting machine, only non-ferrous alloys with __________ are casted. |
| A. | low melting temperature |
| B. | high melting temperature |
| Answer» C. | |
| 4123. |
A mortise gauge is a |
| A. | striking tool |
| B. | planing tool |
| C. | boring tool |
| D. | marking tool |
| Answer» E. | |
| 4124. |
For welding plates of thickness more than 12.5 mm, its edges |
| A. | do not require bevelling |
| B. | should be bevelled to a single-V or U-groove |
| C. | should have a double-V or U-groove on one side |
| D. | should have a double-V or U-groove on both sides |
| Answer» E. | |
| 4125. |
In order to cut mild steel, the cutting angle of chisel should be |
| A. | 30 |
| B. | 45 |
| C. | 50 |
| D. | 60 |
| Answer» E. | |
| 4126. |
The correct sequence for preparing a billet for extrusion process is pickling, alkaline cleaning, phosphate coating and lubricating with reactive soap. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 4127. |
The operation of straightening a curved sheet metal, is known as |
| A. | drawing |
| B. | squeezing |
| C. | coining |
| D. | planishing |
| Answer» E. | |
| 4128. |
Tandem drawing of wires and tubes is necessary because |
| A. | it is not possible to reduce at one stage |
| B. | annealing is needed between stages |
| C. | accuracy in dimensions is not possible otherwise |
| D. | surface finish improves after every drawing stage |
| Answer» C. accuracy in dimensions is not possible otherwise | |
| 4129. |
In a __________ , both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram. |
| A. | simple die |
| B. | progressive die |
| C. | combination die |
| D. | compound die |
| Answer» D. compound die | |
| 4130. |
In electric resistance welding, voltage required for heating is |
| A. | 1 to 5 volts |
| B. | 6 to 10 volts |
| C. | 11 to 20 volts |
| D. | 50 to 100 volts |
| Answer» C. 11 to 20 volts | |
| 4131. |
A rip saw |
| A. | is a two man saw |
| B. | is used for cutting along the grains of wood |
| C. | has a narrow blade with two wooden handles |
| D. | all of the above |
| Answer» C. has a narrow blade with two wooden handles | |
| 4132. |
The welding set up is said to have reversed polarity when the work is connected to the negative terminal and the electrode holder to the positive terminal. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 4133. |
The cutting edge of a chisel should be |
| A. | hardened |
| B. | tempered |
| C. | hardened and tempered |
| D. | case hardened |
| Answer» D. case hardened | |
| 4134. |
Scab is a casting defect which occurs as sand patches on the upper surface of a casting. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4135. |
Most of the oxy-acetylene welding is done with |
| A. | neutral flame |
| B. | oxidising flame |
| C. | carburising flame |
| D. | all of these |
| Answer» B. oxidising flame | |
| 4136. |
Cold working requires much higher pressure that hot working. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 4137. |
The operation of bending a sheet of metal along a curved axis, is known as |
| A. | plunging |
| B. | notching |
| C. | slitting |
| D. | forming |
| Answer» E. | |
| 4138. |
A pair is said to be a kinematic pair, if the relative motion between them is completely or successfully constrained. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 4139. |
When a point moves along a straight line, its acceleration will have |
| A. | radial component only |
| B. | tangential component only |
| C. | coriolis component only |
| D. | radial and tangential components both |
| Answer» C. coriolis component only | |
| 4140. |
The distance between the centre of suspension and centre of percussion is equal to the equivalent length of a simple pendulum. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 4141. |
The primary unbalanced force is maximum when the angle of inclination of the crank with the line of stroke is |
| A. | 0 and 90 |
| B. | 0 and 180 |
| C. | 90 and 180 |
| D. | 180 and 360 |
| Answer» C. 90 and 180 | |
| 4142. |
Which of the following is a higher pair? |
| A. | Belt and pulley |
| B. | Turning pair |
| C. | Screw pair |
| D. | Sliding pair |
| Answer» B. Turning pair | |
| 4143. |
The unbalanced primary forces in a reciprocating engine are |
| A. | balanced completely |
| B. | balanced partially |
| C. | balanced by secondary forces |
| D. | not balanced |
| Answer» C. balanced by secondary forces | |
| 4144. |
When a point at the end of a link moves with constant angular velocity, its acceleration will have |
| A. | radial component only |
| B. | tangential component only |
| C. | coriolis component only |
| D. | radial and tangential components both |
| Answer» B. tangential component only | |
| 4145. |
A body floating in a liquid is said to be not in equilibrium if its metacentre lies below its centre of gravity. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 4146. |
When the flow in an open channel is gradually varied, the flow is said to be |
| A. | steady uniform flow |
| B. | steady non-uniform flow |
| C. | unsteady uniform flow |
| D. | unsteady non-uniform flow |
| Answer» C. unsteady uniform flow | |
| 4147. |
A flow through an expanding tube at constant rate is called |
| A. | steady uniform flow |
| B. | steady non-uniform flow |
| C. | unsteady uniform flow |
| D. | unsteady non-uniform flow |
| Answer» C. unsteady uniform flow | |
| 4148. |
The loss of head at entrance in a pipe is (where v = Velocity of liquid in the pipe) |
| A. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/163-172-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/163-172-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/163-172-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/163-172-4.png"> |
| Answer» C. <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/163-172-3.png"> | |
| 4149. |
Select the correct statement |
| A. | Weber's number is the ratio of inertia force to elastic force. |
| B. | Weber's number is the ratio of gravity force to surface tension force. |
| C. | Weber's number is the ratio of viscous force to pressure force. |
| D. | Weber's number is the ratio of inertia force to surface tension force. |
| Answer» E. | |
| 4150. |
The hydraulic mean depth or the hydraulic radius is the ratio of |
| A. | area of flow and wetted perimeter |
| B. | wetted perimeter and diameter of pipe |
| C. | velocity of flow and area of flow |
| D. | none of these |
| Answer» B. wetted perimeter and diameter of pipe | |