McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
| 201. |
Which among the following does not depend on the friction factor? |
| A. | pipe diameter |
| B. | fluid density |
| C. | viscosity |
| D. | weight |
| Answer» D. weight | |
| 202. |
Darcy- Weisbach equation gives relation between |
| A. | pressure and temperature |
| B. | mass, volume and pressure |
| C. | head loss and pressure loss |
| D. | pressure loss only |
| Answer» C. head loss and pressure loss | |
| 203. |
Loss of head due to friction is |
| A. | directly proportional to hydraulic radius |
| B. | inversely proportional to velocity |
| C. | inversely proportional to hydraulic radius |
| D. | directly proportional to gravitational constant |
| Answer» C. inversely proportional to hydraulic radius | |
| 204. |
The formula for hydraulic diameter is |
| A. | 4a/p |
| B. | 4ap |
| C. | 4av |
| D. | 4v |
| Answer» A. 4a/p | |
| 205. |
Relative roughness is |
| A. | ϵ/d |
| B. | ϵ*d |
| C. | ϵ/dm |
| D. | ϵgd |
| Answer» A. ϵ/d | |
| 206. |
The liquid flowing through a series of pipes can take up |
| A. | pipes of different diameters |
| B. | pipes of the same diameters only. |
| C. | single pipe only |
| D. | short pipes only |
| Answer» A. pipes of different diameters | |
| 207. |
The total head loss for the system is equal to |
| A. | pipe length |
| B. | pipe diameter |
| C. | width of the reservoir |
| D. | height difference of reservoirs |
| Answer» D. height difference of reservoirs | |
| 208. |
Which among the following is not a loss that is developed in the pipe? |
| A. | entry |
| B. | exit |
| C. | connection between two pipes |
| D. | liquid velocity |
| Answer» D. liquid velocity | |
| 209. |
If the two reservoirs are kept at the same level, the head loss is |
| A. | z1-z2 |
| B. | zero |
| C. | t2-t1 |
| D. | s2-s1 |
| Answer» B. zero | |
| 210. |
The pipe diameter is |
| A. | directly proportional to fluid density |
| B. | directly proportional to mass flow rate |
| C. | inversely proportional to mass flow rate |
| D. | directly proportional to fluid velocity |
| Answer» B. directly proportional to mass flow rate | |
| 211. |
Coefficient of friction of a laminar flow is |
| A. | re/16 |
| B. | re/64 |
| C. | 16/re |
| D. | 64/re |
| Answer» C. 16/re | |
| 212. |
1 NEED FOR DIMENSIONAL ANALYSIS - METHODS OF DIMENSIONAL ANALYSIS |
| A. | botanical science |
| B. | zoological science |
| C. | chemistry |
| D. | physics |
| Answer» C. chemistry | |
| 213. |
Similitude is a concept applicable to the testing of |
| A. | mathematical models |
| B. | physical models |
| C. | engineering models |
| D. | chemical models |
| Answer» C. engineering models | |
| 214. |
A model of with same shape is |
| A. | geometric similarity |
| B. | kinematic similarity |
| C. | dynamic similarity |
| D. | conditional similarity |
| Answer» A. geometric similarity | |
| 215. |
All the parameters in a similitude are described using |
| A. | continuum mechanics |
| B. | solid mechanics |
| C. | diesel mechanics |
| D. | aircraft mechanics |
| Answer» A. continuum mechanics | |
| 216. |
The rate at which the particles of fluid can spread is called |
| A. | surface tension |
| B. | diffusivity |
| C. | viscosity |
| D. | kinetics |
| Answer» B. diffusivity | |
| 217. |
The Prandtl Number approximates |
| A. | momentum diffusivity to thermal diffusivity |
| B. | thermal diffusivity to momentum diffusivity |
| C. | shear stress to thermal diffusivity |
| D. | thermal diffusivity to kinematic viscosity |
| Answer» A. momentum diffusivity to thermal diffusivity | |
| 218. |
Which among the following is the standard symbol for Atwood number? |
| A. | a |
| B. | ar |
| C. | ar |
| D. | a |
| Answer» A. a | |
| 219. |
Fanning friction factor is |
| A. | 0.25 times darcy friction factor |
| B. | same as darcy friction factor |
| C. | 2 times darcy friction factor |
| D. | independent |
| Answer» A. 0.25 times darcy friction factor | |
| 220. |
Which among the following is the standard symbol for Froude number? |
| A. | f |
| B. | fo |
| C. | fr |
| D. | f |
| Answer» C. fr | |
| 221. |
Principle of fluid mechanics works on the utilization of |
| A. | accelerating mass |
| B. | volume |
| C. | work |
| D. | velocity |
| Answer» C. work | |
| 222. |
The force analysis on a curved vane is understood using |
| A. | velocity triangles |
| B. | angle of the plate |
| C. | vane angles |
| D. | plate dimensions |
| Answer» A. velocity triangles | |
| 223. |
Jet propulsion works on the principle of |
| A. | newton’s first law |
| B. | newton’s second law |
| C. | newton’s third law |
| D. | thermodynamic properties |
| Answer» C. newton’s third law | |
| 224. |
The relative velocity is obtained by the equation |
| A. | u – v1 |
| B. | v1 |
| C. | u*v1 |
| D. | u/v1 |
| Answer» A. u – v1 | |
| 225. |
If the friction is neglected, then |
| A. | vr1 > vr2 |
| B. | vr1 < vr2 |
| C. | vr1 = vr2 |
| D. | vr1 is a zero |
| Answer» C. vr1 = vr2 | |
| 226. |
Through inlet orifices, which are facing the direction of motion of the ship, the water from the sea can be taken by the pump. |
| A. | true |
| B. | false |
| Answer» A. true | |
| 227. |
Jet propulsion of ship is less efficient than screw propeller due to |
| A. | pressure |
| B. | temperature |
| C. | frictional losses |
| D. | wear and tear |
| Answer» C. frictional losses | |
| 228. |
A jet strikes a curved plate at its |
| A. | sides |
| B. | surface |
| C. | centre |
| D. | does not strike |
| Answer» C. centre | |
| 229. |
Which among the following is not a type of jet engine? |
| A. | turbojet |
| B. | ramjet |
| C. | scramjet |
| D. | propulsive jet |
| Answer» D. propulsive jet | |
| 230. |
The fluid gains while passing through the impeller. |
| A. | velocity |
| B. | pressure |
| C. | temperature |
| D. | velocity and pressure |
| Answer» D. velocity and pressure | |
| 231. |
What is the shape of the diffuser in the centrifugal pump? |
| A. | round |
| B. | dough nut |
| C. | rectangle |
| D. | cylindrical |
| Answer» B. dough nut | |
| 232. |
When the casing in a centrifugal pump decelerates the flow, what increases? |
| A. | pressure |
| B. | temperature |
| C. | volume |
| D. | flow rate |
| Answer» A. pressure | |
| 233. |
The velocity imparted by the impeller is converted into |
| A. | pressure energy |
| B. | kinetic energy |
| C. | momentum |
| D. | potential energy |
| Answer» A. pressure energy | |
| 234. |
The consequence of Newtons second law is |
| A. | conservation of angular momentum |
| B. | conservation of mass |
| C. | conservation of potential energy |
| D. | conservation of kinetic energy |
| Answer» A. conservation of angular momentum | |
| 235. |
Euler developed the head pressure equation in centrifugal pumps. |
| A. | true |
| B. | false |
| Answer» A. true | |
| 236. |
What is a major advantage of centrifugal pump? |
| A. | cost |
| B. | simple in construction |
| C. | efficiency |
| D. | pump parameters |
| Answer» B. simple in construction | |
| 237. |
Different velocities in a centrifugal pump are determined by using |
| A. | velocity triangle |
| B. | reynolds number |
| C. | froude number |
| D. | overall efficiency |
| Answer» A. velocity triangle | |
| 238. |
With the increase in the input power, efficiency |
| A. | increases |
| B. | decreases |
| C. | same |
| D. | independent |
| Answer» B. decreases | |
| 239. |
Turbomachines work under |
| A. | newtons first law |
| B. | newtons second law |
| C. | newtons third law |
| D. | kepler’s law |
| Answer» B. newtons second law | |
| 240. |
The main function of nozzle is to |
| A. | pump start procedure |
| B. | positive start pump |
| C. | pump start pointer |
| D. | positive start pointer |
| Answer» A. pump start procedure | |
| 241. |
The main function of centrifugal pumps are to |
| A. | transfer speed |
| B. | transfer pressure |
| C. | transfer temperature |
| D. | transfer energy |
| Answer» D. transfer energy | |
| 242. |
The inlet passage of water entry is controlled by |
| A. | head race |
| B. | gate |
| C. | tail race |
| D. | pump |
| Answer» B. gate | |
| 243. |
Centrifugal pumps transport fluids by converting |
| A. | kinetic energy to hydrodynamic energy |
| B. | hydrodynamic energy to kinetic energy |
| C. | mechanical energy to kinetic energy |
| D. | mechanical energy to hydrodynamic energy |
| Answer» A. kinetic energy to hydrodynamic energy | |
| 244. |
With the increase in load, Energy in the turbine |
| A. | decreases |
| B. | increases |
| C. | remains same |
| D. | independent |
| Answer» A. decreases | |
| 245. |
When the balancing of the turbine is disturbed, we use |
| A. | throttle governing |
| B. | steam governing |
| C. | nozzle governing |
| D. | emergency governing |
| Answer» D. emergency governing | |
| 246. |
The fluid coming into the centrifugal pump is accelerated by |
| A. | throttle |
| B. | impeller |
| C. | nozzle |
| D. | governor |
| Answer» B. impeller | |
| 247. |
Reciprocating pump is a |
| A. | negative displacement pump |
| B. | positive displacement pump |
| C. | diaphragm pump |
| D. | emulsion pump |
| Answer» B. positive displacement pump | |
| 248. |
The cylinder of reciprocating cylinder is made up of |
| A. | cast iron |
| B. | wrought iron |
| C. | aluminium |
| D. | copper |
| Answer» A. cast iron | |
| 249. |
The higher discharge valve line holds the discharge valve |
| A. | open |
| B. | closed |
| C. | stop functioning |
| D. | automatic |
| Answer» B. closed | |
| 250. |
Reciprocating pumps are also called as |
| A. | force pumps |
| B. | mass pumps |
| C. | heat pumps |
| D. | speed pumps |
| Answer» A. force pumps | |
Done Studing? Take A Test.
Great job completing your study session! Now it's time to put your knowledge to the test. Challenge yourself, see how much you've learned, and identify areas for improvement. Don’t worry, this is all part of the journey to mastery. Ready for the next step? Take a quiz to solidify what you've just studied.