McqMate
Chapters
| 401. |
Which of the following is taken into account during a characteristic curve? |
| A. | Flow rate |
| B. | Cavitation |
| C. | Tolerances |
| D. | Casing View Answer |
| Answer» A. Flow rate | |
| 402. |
As the specific speed increases, the slope of HQ curve |
| A. | Decreases |
| B. | Increases |
| C. | Independent |
| D. | Remains the same View Answer |
| Answer» C. Independent | |
| 403. |
The primary selection tool is called as |
| A. | Pump curve |
| B. | Speed curve |
| C. | Power curve |
| D. | Fluid curve View Answer |
| Answer» A. Pump curve | |
| 404. |
Voids are created due to |
| A. | Reaction ratio |
| B. | Pressure ratio |
| C. | Liquid free layers |
| D. | Volumetric layers View Answer |
| Answer» C. Liquid free layers | |
| 405. |
Cavitation usually occurs due to the changes in |
| A. | Pressure |
| B. | Temperature |
| C. | Volume |
| D. | Heat View Answer |
| Answer» A. Pressure | |
| 406. |
Degree of reactions are most commonly used in |
| A. | Turbomachinery |
| B. | Pressure drag |
| C. | Aerodynamics |
| D. | Automobiles View Answer |
| Answer» A. Turbomachinery | |
| 407. |
At high pressure, the voids can generate |
| A. | Drag force |
| B. | Mass density |
| C. | Shock waves |
| D. | Flow speed View Answer |
| Answer» C. Shock waves | |
| 408. |
Voids that implode near metal surface develops a |
| A. | Drag force |
| B. | Cyclic stress |
| C. | Shock waves |
| D. | Flow speed View Answer |
| Answer» B. Cyclic stress | |
| 409. |
Internal cavitation occurs due to |
| A. | Drag force |
| B. | Cyclic stress |
| C. | Shock waves |
| D. | Flow speed View Answer |
| Answer» C. Shock waves | |
| 410. |
The velocities of the blade angles can be found out using |
| A. | Mach number |
| B. | Froude’s number |
| C. | Velocity triangles |
| D. | Reynolds number View Answer |
| Answer» C. Velocity triangles | |
| 411. |
Hydrodynamic cavitation is due to the process of |
| A. | Vaporisation |
| B. | Sedimentation |
| C. | Filtration |
| D. | Excavation View Answer |
| Answer» A. Vaporisation | |
| 412. |
The process of bubble generation leads to |
| A. | High temperatures |
| B. | High pressures |
| C. | High energy densities |
| D. | High volumetric ratio View Answer |
| Answer» C. High energy densities | |
| 413. |
Reciprocating pump is a |
| A. | Negative displacement pump |
| B. | Positive displacement pump |
| C. | Diaphragm pump |
| D. | Emulsion pump |
| Answer» B. Positive displacement pump | |
| 414. |
What happens to the reciprocating pump when left untouched? |
| A. | Efficiency decreases |
| B. | Wear and tear |
| C. | Surface expansion |
| D. | Pressure change |
| Answer» C. Surface expansion | |
| 415. |
Reciprocating pumps operate by drawing into the chamber |
| A. | Liquid |
| B. | Pressure |
| C. | Heat |
| D. | Electricity |
| Answer» A. Liquid | |
| 416. |
The cylinder of reciprocating cylinder is made up of |
| A. | Cast iron |
| B. | Wrought iron |
| C. | Aluminium |
| D. | Copper View Answer |
| Answer» A. Cast iron | |
| 417. |
The higher discharge valve line holds the discharge valve |
| A. | Open |
| B. | Closed |
| C. | Stop functioning |
| D. | Automatic View Answer |
| Answer» B. Closed | |
| 418. |
Reciprocating pumps are also called as |
| A. | Force pumps |
| B. | Mass Pumps |
| C. | Heat pumps |
| D. | Speed pumps View Answer |
| Answer» A. Force pumps | |
| 419. |
Reciprocating pumps are classified according to |
| A. | Drag force |
| B. | Number of cylinders |
| C. | Shock waves |
| D. | Flow speed View Answer |
| Answer» B. Number of cylinders | |
| 420. |
Simple hand operating pump is also called as |
| A. | Froth pump |
| B. | Bicycle pump |
| C. | Multistage pumps |
| D. | Centrifugal pumps View Answer |
| Answer» B. Bicycle pump | |
| 421. |
Power operated pump in which only one side engages the fluid displacement is called |
| A. | Froth pump |
| B. | Single acting |
| C. | Double acting |
| D. | Bicycle pump View Answer |
| Answer» B. Single acting | |
| 422. |
Operation of reciprocating motion is done by a source |
| A. | Power |
| B. | Energy |
| C. | Momentum |
| D. | Inertia View Answer |
| Answer» A. Power | |
| 423. |
An up and down back and forth relative linear motion is called |
| A. | Reciprocation |
| B. | Rotation |
| C. | Filtration |
| D. | Excavation View Answer |
| Answer» A. Reciprocation | |
| 424. |
Power operated pump in which only both sides engage the fluid displacement is called |
| A. | Froth pump |
| B. | Single acting |
| C. | Double acting |
| D. | Bicycle pump View Answer |
| Answer» C. Double acting | |
| 425. |
The two opposite motion that comprise a single reciprocation is called |
| A. | Turbocharger |
| B. | Stokes |
| C. | Fluid motion |
| D. | Auto motion View Answer |
| Answer» A. Turbocharger | |
| 426. |
Reciprocating pumps has efficiency compared to centrifugal pumps |
| A. | Higher |
| B. | Lower |
| C. | Equal |
| D. | Exponential View Answer |
| Answer» B. Lower | |
| 427. |
Reciprocating pumps works on the principle of |
| A. | Drag force |
| B. | Liquid flow push |
| C. | Shock waves |
| D. | Flow speed View Answer |
| Answer» B. Liquid flow push | |
| 428. |
Reciprocating pump is a type of |
| A. | Positive displacement pump |
| B. | Bicycle pump |
| C. | Multistage pumps |
| D. | Centrifugal pumps View Answer |
| Answer» A. Positive displacement pump | |
| 429. |
During the suction stroke the moves left thus creating vacuum in the Cylinder. |
| A. | Piston |
| B. | Cylinder |
| C. | Valve |
| D. | Pump View Answer |
| Answer» A. Piston | |
| 430. |
When both the sources are effective it is called as |
| A. | Double acting pump |
| B. | Single acting pump |
| C. | Triple acting pump |
| D. | Normal pump View Answer |
| Answer» A. Double acting pump | |
| 431. |
A repetitive variation about the central value of equilibrium is called |
| A. | Reciprocation |
| B. | Oscillation |
| C. | Filtration |
| D. | Excavation View Answer |
| Answer» B. Oscillation | |
| 432. |
A linear wheel turning motion is called as a |
| A. | Reciprocation |
| B. | Rotation |
| C. | Oscillation |
| D. | Bicycle pump View Answer |
| Answer» B. Rotation | |
| 433. |
A reciprocating pump that has 1200 crank is |
| A. | Froth pump |
| B. | Single acting |
| C. | Double acting |
| D. | Triple acting View Answer |
| Answer» D. Triple acting View Answer | |
| 434. |
In a positive displacement pump, what gets displaced? |
| A. | Fluid |
| B. | Volume |
| C. | Pressure |
| D. | Temperature View Answer |
| Answer» B. Volume | |
| 435. |
What happens to the reciprocating pump when left untouched? |
| A. | Efficiency decreases |
| B. | Wear and tear |
| C. | Surface expansion |
| D. | Pressure change View Answer |
| Answer» C. Surface expansion | |
| 436. |
Positive displacement pumps are capable of developing pressures, in suction pressure. |
| A. | High, low |
| B. | Low, high |
| C. | High, high |
| D. | Low, low View Answer |
| Answer» A. High, low | |
| 437. |
When is a reciprocating pump used? |
| A. | When quantity of liquid is small |
| B. | When quantity of liquid is large |
| C. | To pump high pressure |
| D. | To pump low pressure View Answer |
| Answer» A. When quantity of liquid is small | |
| 438. |
Positive displacement pumps are also called as_ |
| A. | Constant pressure pump |
| B. | Pressure drag pumps |
| C. | Constant volume pumps |
| D. | Constant head pumps View Answer |
| Answer» C. Constant volume pumps | |
| 439. |
In centrifugal pumps, their capacity is affected due to |
| A. | Drag force |
| B. | Cyclic stress |
| C. | Shock waves |
| D. | Pressure View Answer |
| Answer» D. Pressure View Answer | |
| 440. |
A quantity of fluid that leaks from a higher pressure discharge to a lower pressure discharge is called |
| A. | Slip |
| B. | Heat |
| C. | Friction |
| D. | Enthalpy View Answer |
| Answer» A. Slip | |
| 441. |
Positive displacement pumps regulate the flow by varying its |
| A. | Drag force |
| B. | Cyclic stress |
| C. | Shock waves |
| D. | Flow speed View Answer |
| Answer» D. Flow speed View Answer | |
| 442. |
Simplest example of single acting reciprocating pump is |
| A. | Mineral ores |
| B. | Whirl wheels |
| C. | Bicycle tires |
| D. | Syringe View Answer |
| Answer» D. Syringe View Answer | |
| 443. |
Rotary pumps do not function well under |
| A. | High Vaporisation |
| B. | High Sedimentation |
| C. | High viscosity |
| D. | Excavation View Answer |
| Answer» C. High viscosity | |
| 444. |
The parameter that disturbs the working of the rotary pump is_ |
| A. | High Vaporisation |
| B. | High Sedimentation |
| C. | Low flow rate |
| D. | Excavation View Answer |
| Answer» C. Low flow rate | |
| 445. |
Rotary pumps are commonly used to circulate_ |
| A. | Lube oils |
| B. | Petroleum |
| C. | Diesel |
| D. | Water View Answer |
| Answer» A. Lube oils | |
| 446. |
Capacity of a rotary pump is defined as |
| A. | Total liquid displaced |
| B. | Overall performance of pump |
| C. | Maximum fluid flow |
| D. | Minimum fluid flow View Answer |
| Answer» A. Total liquid displaced | |
| 447. |
What type of flow does the reciprocating pump have? |
| A. | Uniform |
| B. | Continuous |
| C. | Pulsating |
| D. | Non-uniform View Answer |
| Answer» B. Continuous | |
| 448. |
What is the full form of PD? |
| A. | Positive displacement |
| B. | Pump displacement |
| C. | Plunger displacement |
| D. | Plunger direct View Answer |
| Answer» A. Positive displacement | |
| 449. |
Why can’t rotary pumps non-lubricate water? |
| A. | Because it has lesser viscosity |
| B. | Because it contains abrasive particles |
| C. | Multistage pumps are difficult to operate |
| D. | Draft tube is thin View Answer |
| Answer» B. Because it contains abrasive particles | |
| 450. |
The maximum speed of reciprocating pump is |
| A. | 20m/min |
| B. | 30m/min |
| C. | 40m/min |
| D. | 50m/min View Answer |
| Answer» B. 30m/min | |
| 451. |
The pump that uses a relatively smaller amount of liquid is called |
| A. | Froth pump |
| B. | Reciprocating pump |
| C. | Double acting |
| D. | Bicycle pump View Answer |
| Answer» B. Reciprocating pump | |
| 452. |
Sliding vanes in pumps are held by |
| A. | Draft pins |
| B. | Whirl wheels |
| C. | Springs |
| D. | Nails View Answer |
| Answer» C. Springs | |
| 453. |
Air vessel accumulates excess quantity of |
| A. | Vapor |
| B. | Water |
| C. | Heat |
| D. | Pressure View Answer |
| Answer» B. Water | |
| 454. |
In which pump is the liquid in contact with both the sides of the plunger |
| A. | Froth pump |
| B. | Single acting |
| C. | Double acting |
| D. | Bicycle pump View Answer |
| Answer» C. Double acting | |
| 455. |
When a cylinder has inlet and outlet ports at each end, then it is called as |
| A. | Double acting |
| B. | Air lift pumps |
| C. | Reciprocating pumps |
| D. | Centrifugal pumps View Answer |
| Answer» A. Double acting | |
| 456. |
Turbomachines work under |
| A. | Newtons first law |
| B. | Newtons second law |
| C. | Newtons third law |
| D. | Kepler’s law View Answer |
| Answer» B. Newtons second law | |
| 457. |
The main function of nozzle is to |
| A. | Varying temperatures |
| B. | Pressure variations |
| C. | Load variations |
| D. | Heat variations View Answer |
| Answer» B. Pressure variations | |
| 458. |
When the piston moves forward, liquid is drawn |
| A. | Into the cylinder |
| B. | Away from the cylinder |
| C. | Into the draft tube |
| D. | Away from the draft tube View Answer |
| Answer» A. Into the cylinder | |
| 459. |
In a reciprocating pump, with the change in discharge pressure, |
| A. | The Volume delivered increases |
| B. | The volume delivered decreases |
| C. | Volume delivered remains the same |
| D. | Volume delivered is independent View Answer |
| Answer» C. Volume delivered remains the same | |
| 460. |
The amount of fluid that leaks internally is called |
| A. | Head race |
| B. | Slip |
| C. | Tail race |
| D. | Internal friction View Answer |
| Answer» B. Slip | |
| 461. |
For a good condition, slip should be_ |
| A. | Below 1 percent |
| B. | 1 to 2 percent |
| C. | 3 to 4 percent |
| D. | Above 5 percent View Answer |
| Answer» A. Below 1 percent | |
| 462. |
If the slip is above 5 percent, the pumps needs to be |
| A. | Dragged |
| B. | Overhauled |
| C. | Retracted |
| D. | Intermittent View Answer |
| Answer» B. Overhauled | |
| 463. |
Slip in a pump depends on which of following parameters? |
| A. | Wear |
| B. | Pressure |
| C. | Temperature |
| D. | Heat View Answer |
| Answer» A. Wear | |
| 464. |
Internal breakage in a pump mainly takes place when |
| A. | Discharge pressure is increased |
| B. | Temperature is increased |
| C. | Heat leads to expansion |
| D. | Corrosion takes place View Answer |
| Answer» A. Discharge pressure is increased | |
| 465. |
The output that we get after an internal breakage can be classed as |
| A. | An increase |
| B. | A decrease |
| C. | Constant |
| D. | An independent variable View Answer |
| Answer» C. Constant | |
| 466. |
When the hydraulic fluid forms on only one side of the piston, it is called |
| A. | Single acting pump |
| B. | Double acting pump |
| C. | Froth pump |
| D. | Draft tube View Answer |
| Answer» A. Single acting pump | |
| 467. |
A pump with two steams and two water cylinders is called |
| A. | Single acting pump |
| B. | Double acting pump |
| C. | Froth pump |
| D. | Duplex pump View Answer |
| Answer» D. Duplex pump View Answer | |
| 468. |
When an external force is not available in a pump, we use a |
| A. | Hydraulic cylinder |
| B. | Slip gauge |
| C. | Tail race |
| D. | Heater View Answer |
| Answer» A. Hydraulic cylinder | |
| 469. |
Reciprocating pumps give a flow |
| A. | Uniform |
| B. | Non- uniform |
| C. | Pulsating |
| D. | Sinusoidal View Answer |
| Answer» C. Pulsating | |
| 470. |
Suction stroke becomes difficult to pump |
| A. | High temperature fluids |
| B. | Viscous fluids |
| C. | Fluids with abrasives |
| D. | High velocity fluids View Answer |
| Answer» B. Viscous fluids | |
| 471. |
Piston pumps are very |
| A. | Expensive |
| B. | Cheap |
| C. | Reasonable |
| D. | Intricate View Answer |
| Answer» A. Expensive | |
| 472. |
What is the full form of DAC? |
| A. | Digital Acting pumps |
| B. | Double acting pumps |
| C. | Data acting pumps |
| D. | Draft tube pumps View Answer |
| Answer» B. Double acting pumps | |
| 473. |
Which among the following is not a multi-cylinder pump? |
| A. | Double acting simplex |
| B. | Single acting duplex |
| C. | Double acting duplex |
| D. | Single acting triplex View Answer |
| Answer» A. Double acting simplex | |
| 474. |
A pressure vessel is used to hold |
| A. | Air |
| B. | Gases |
| C. | Molecules |
| D. | Solids View Answer |
| Answer» B. Gases | |
| 475. |
A tank that is used to protect closed water heating systems is called |
| A. | Pressure vessel |
| B. | Expansion vessel |
| C. | Heat vessel |
| D. | Auto vessel View Answer |
| Answer» B. Expansion vessel | |
| 476. |
How is the construction of the vessel tested? |
| A. | Uniform testing |
| B. | Continuous testing |
| C. | Pulsating test |
| D. | Non-destructive testing View Answer |
| Answer» D. Non-destructive testing View Answer | |
| 477. |
Where is the excess quantity of water from the pump accumulated? |
| A. | Froth tube |
| B. | Draft tube |
| C. | Air vessels |
| D. | Bicycle pump View Answer |
| Answer» C. Air vessels | |
| 478. |
What is the shape of a pressure vessel? |
| A. | Square |
| B. | Spheres |
| C. | Cones |
| D. | All the shapes View Answer |
| Answer» D. All the shapes View Answer | |
| 479. |
Pressure vessel closures are used to |
| A. | Avoid breakage |
| B. | Avoid leakage |
| C. | Retain structures |
| D. | Maintain pressure View Answer |
| Answer» C. Retain structures | |
| 480. |
The main function of nozzle is to |
| A. | Varying temperatures |
| B. | Pressure variations |
| C. | Load variations |
| D. | Heat variations |
| Answer» B. Pressure variations | |
| 481. |
Which among the following control the flow rate? |
| A. | Valve |
| B. | Pump |
| C. | Head |
| D. | Tank pipe |
| Answer» A. Valve | |
| 482. |
Force exerted by a jet on a stationery plate happens in how many cases? |
| A. | 3 cases |
| B. | 2 cases |
| C. | 1 case |
| D. | Nil |
| Answer» A. 3 cases | |
| 483. |
Force exerted by a jet on a moving plate happens in how many cases? |
| A. | 3 cases |
| B. | 2 cases |
| C. | 1 case |
| D. | Nil |
| Answer» A. 3 cases | |
| 484. |
In a stationery vertical plate, the jet after striking the plate will move |
| A. | In opposite direction |
| B. | Along the plate |
| C. | Perpendicular to the plate |
| D. | Parallel to the plate |
| Answer» B. Along the plate | |
| 485. |
At what angle does the jet deflect after striking a stationery vertical plate? |
| A. | 30 |
| B. | 60 |
| C. | 90 |
| D. | 0 |
| Answer» C. 90 | |
| 486. |
The velocity component after striking the surface will be_ |
| A. | One |
| B. | Zero |
| C. | Infinity |
| D. | Negative |
| Answer» B. Zero | |
| 487. |
Which among the following is the formula for Force when it strikes the plate? |
| A. | pav2 |
| B. | pav |
| C. | pa |
| D. | maE |
| Answer» A. pav2 | |
| 488. |
To derive pav2, we take final velocity minus the initial velocity. |
| A. | True |
| B. | False |
| C. | none |
| D. | none |
| Answer» B. False | |
| 489. |
The mass of water per sec striking the plate is |
| A. | pav2 |
| B. | pav |
| C. | pa |
| D. | maE |
| Answer» B. pav | |
| 490. |
Which among the following is formula for force when it acts along the direction of flow? |
| A. | pav2Sin2θ |
| B. | pav Sin2θ |
| C. | pa Sin2θ |
| D. | maE Sin2θ |
| Answer» A. pav2Sin2θ | |
| 491. |
Which among the following is a formula for force when it acts perpendicular to the direction of flow? |
| A. | pav2 SinθCosθ |
| B. | pav Sin2θ |
| C. | pa Sin2θ |
| D. | maE Sin2θ |
| Answer» A. pav2 SinθCosθ | |
| 492. |
A jet strikes a curved plate at its |
| A. | Sides |
| B. | Surface |
| C. | Centre |
| D. | Does not strike |
| Answer» C. Centre | |
| 493. |
During a weak jump, the value of Froude lies in between |
| A. | 1 to 2.5 |
| B. | 2.5 to 3.5 |
| C. | Less than 1 |
| D. | Zero |
| Answer» A. 1 to 2.5 | |
| 494. |
During an oscillating jump, the value of Froude lies in between |
| A. | 1 to 2.5 |
| B. | 2.5 to 4.5 |
| C. | Less than 1 |
| D. | Zero |
| Answer» A. 1 to 2.5 | |
| 495. |
A jet after striking a smooth plate comes out with a velocity. |
| A. | Increased |
| B. | Decreased |
| C. | Same |
| D. | Zero |
| Answer» C. Same | |
| 496. |
Component of velocity in direction of jet is -VCosθ |
| A. | True |
| B. | False |
| C. | none |
| D. | none |
| Answer» A. True | |
| 497. |
Jet propulsion is a method of generating propulsive force by reaction of |
| A. | Accelerating mass |
| B. | Volume |
| C. | Mass flow rate |
| D. | Velocity |
| Answer» A. Accelerating mass | |
| 498. |
The propulsive force drives the jet in the |
| A. | Backward direction |
| B. | Forward direction |
| C. | Perpendicular direction |
| D. | Parallel movement |
| Answer» B. Forward direction | |
| 499. |
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 | |
| 500. |
What does Cv in jet propulsion equation stand for? |
| A. | Area of orifice |
| B. | Velocity |
| C. | Temperature coefficient |
| D. | Velocity coefficient |
| Answer» D. Velocity coefficient | |
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