McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Civil Engineering .
Chapters
| 501. |
The movement of ships and boats in water is due to |
| A. | Water currents |
| B. | Jet propulsion |
| C. | Mass flow rate |
| D. | Volumetric changes |
| Answer» B. Jet propulsion | |
| 502. |
The inlet orifices are at what angle with the motion of the ship? |
| A. | 0 |
| B. | 30 |
| C. | 60 |
| D. | 90 |
| Answer» D. 90 | |
| 503. |
Which among the following is a formula for force when it acts perpendicular to the direction of flow? |
| A. | pav2 SinθCosθ |
| B. | pav Sin2 θ |
| C. | pa Sin2 θ |
| D. | maE Sin2 θ |
| Answer» A. pav2 SinθCosθ | |
| 504. |
Which among the following is the formula for relative velocity? |
| A. | V + u |
| B. | Vu |
| C. | V – u |
| D. | V/u |
| Answer» A. V + u | |
| 505. |
Component of velocity in direction of jet is -VCosθ. What does ‘θ’ indicate? |
| A. | Angle made by jet |
| B. | Angle made by jet and outlet tip |
| C. | Angle made by jet and inlet tip |
| D. | Tangent angle |
| Answer» C. Angle made by jet and inlet tip | |
| 506. |
Principle of fluid mechanics works on the utilization of |
| A. | Accelerating mass |
| B. | Volume |
| C. | Work |
| D. | Velocity |
| Answer» C. Work | |
| 507. |
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 | |
| 508. |
How is absolute velocity at inlet denoted? |
| A. | V |
| B. | V1 |
| C. | C |
| D. | v |
| Answer» B. V1 | |
| 509. |
The relative velocity is obtained by the equation |
| A. | u – V1 |
| B. | V1 |
| C. | u*V1 |
| D. | u/V1 |
| Answer» A. u – V1 | |
| 510. |
If the friction is neglected, then |
| A. | Vr1 > Vr2 |
| B. | Vr1 < Vr2 |
| C. | Vr1 = Vr2 |
| D. | Vr1 is a zero |
| Answer» C. Vr1 = Vr2 | |
| 511. |
If the pressure remains a constant, then |
| A. | Vr1 > Vr2 |
| B. | Vr1 < Vr2 |
| C. | Vr1 = Vr2 |
| D. | Vr1 is a zero |
| Answer» C. Vr1 = Vr2 | |
| 512. |
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 | |
| 513. |
Jet propulsion of ship in a very shallow water is needed to |
| A. | Avoid sinking of the ship |
| B. | Avoid damage of the propeller |
| C. | Avoid current directions |
| D. | Avoid surface damage |
| Answer» B. Avoid damage of the propeller | |
| 514. |
A turbojet does not consist of which of the following component? |
| A. | Compressor |
| B. | Combustion chamber |
| C. | Gas turbine |
| D. | Air filter |
| Answer» D. Air filter | |
| 515. |
Which among the following is not a type of jet engine? |
| A. | Turbojet |
| B. | Ramjet |
| C. | Scramjet |
| D. | Propulsive jet |
| Answer» D. Propulsive jet | |
| 516. |
Hydraulic energy is converted into another form of energy by hydraulic machines. What form of energy is that? |
| A. | Mechanical Energy |
| B. | Electrical Energy |
| C. | Nuclear Energy |
| D. | Elastic Energy |
| Answer» A. Mechanical Energy | |
| 517. |
Which principle is used in Hydraulic Turbines? |
| A. | Faraday law |
| B. | Newton’s second law |
| C. | Charles law |
| D. | Braggs law |
| Answer» B. Newton’s second law | |
| 518. |
Buckets and blades used in a turbine are used to: |
| A. | Alter the direction of water |
| B. | Switch off the turbine |
| C. | To regulate the wind speed |
| D. | To regenerate the power |
| Answer» A. Alter the direction of water | |
| 519. |
is the electric power obtained from the energy of the water. |
| A. | Roto dynamic power |
| B. | Thermal power |
| C. | Nuclear power |
| D. | Hydroelectric power |
| Answer» D. Hydroelectric power | |
| 520. |
Which energy generated in a turbine is used to run electric power generator linked to the turbine shaft? |
| A. | Mechanical Energy |
| B. | Potential Energy |
| C. | Elastic Energy |
| D. | Kinetic Energy |
| Answer» A. Mechanical Energy | |
| 521. |
Hydraulic Machines fall under the category : |
| A. | Pulverizers |
| B. | Kinetic machinery |
| C. | Condensers |
| D. | Roto-dynamic machinery |
| Answer» D. Roto-dynamic machinery | |
| 522. |
Which kind of turbines changes the pressure of the water entered through it? |
| A. | Reaction turbines |
| B. | Impulse turbines |
| C. | Reactive turbines |
| D. | Kinetic turbines |
| Answer» A. Reaction turbines | |
| 523. |
Which type of turbine is used to change the velocity of the water through its flow? |
| A. | Kinetic turbines |
| B. | Axial flow turbines |
| C. | Impulse turbines |
| D. | Reaction turbines |
| Answer» C. Impulse turbines | |
| 524. |
Which type of turbine is a Francis Turbine? |
| A. | Impulse Turbine |
| B. | Screw Turbine |
| C. | Reaction turbine |
| D. | Turgo turbine |
| Answer» C. Reaction turbine | |
| 525. |
How many types of Reaction turbines are there? |
| A. | 5 |
| B. | 4 |
| C. | 3 |
| D. | 9 |
| Answer» A. 5 | |
| 526. |
Maximum Number of jets, generally, employed in an impulse turbine without jet interference can be? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 6 |
| Answer» D. 6 | |
| 527. |
The overall efficiency of a reaction turbine is the ratio of |
| A. | Actual work available at the turbine to the energy imparted to the wheel |
| B. | Work done on the wheel to the energy (or head of water) actually supplied to the turbine |
| C. | Power produced by the turbine to the energy actually supplied by the turbine |
| D. | Actual work available at the turbine to energy imparted to the wheel |
| Answer» A. Actual work available at the turbine to the energy imparted to the wheel | |
| 528. |
In a reaction turbine, the draft tube is used to |
| A. | To increase the head of water by an amount that is equal to the height of the runner outlet above the tail race |
| B. | To prevent air to enter the turbine |
| C. | To increase pressure energy of water |
| D. | To transport water to downstream |
| Answer» A. To increase the head of water by an amount that is equal to the height of the runner outlet above the tail race | |
| 529. |
In reaction turbine hydraulic efficiency is_ |
| A. | Ratio of actual work at the turbine to the energy imparted to the wheel. |
| B. | Ratio of work done on the wheel to energy that is supplied to the turbine. |
| C. | Ratio of power produced by the turbine to the energy actually supplied by the turbine. |
| D. | Ratio of Work done on the wheel to the energy (or head of water) actually supplied to the turbine. |
| Answer» B. Ratio of work done on the wheel to energy that is supplied to the turbine. | |
| 530. |
Consider an inward flow reaction turbine, here, water |
| A. | Flows parallel to the axis of the wheel |
| B. | Enters the wheel at the outer periphery and then flows towards the centre of the wheel |
| C. | Flow is partly radial and partly axial |
| D. | Enters at the centre of the wheel and then flows towards the outer periphery of the wheel |
| Answer» B. Enters the wheel at the outer periphery and then flows towards the centre of the wheel | |
| 531. |
The working of which of the following hydraulic units is based on Pascal’s law? |
| A. | Air lift pump |
| B. | Hydraulic coupling |
| C. | Hydraulic press |
| D. | Jet pump |
| Answer» C. Hydraulic press | |
| 532. |
Which kind of turbine is a Pelton Wheel turbine? |
| A. | Tangential flow turbine. |
| B. | Radial flow turbine |
| C. | Outward flow turbine |
| D. | Inward flow turbine |
| Answer» A. Tangential flow turbine. | |
| 533. |
IN what type of turbine water enters in radial direction and leaves axial direction? |
| A. | Tangential flow turbine |
| B. | Axial flow turbine |
| C. | Outward flow turbine |
| D. | Mixed flow turbine |
| Answer» D. Mixed flow turbine | |
| 534. |
How many types of turbines can you classify on the basis of direction of flow through runner? |
| A. | 6 |
| B. | 3 |
| C. | 4 |
| D. | 7 |
| Answer» C. 4 | |
| 535. |
Into how many types can you classify radial flow turbines? |
| A. | 4 |
| B. | 3 |
| C. | 6 |
| D. | 2 |
| Answer» D. 2 | |
| 536. |
Into how many types can you classify turbines on basis of head at inlet? |
| A. | 3 |
| B. | 4 |
| C. | 6 |
| D. | 5 |
| Answer» A. 3 | |
| 537. |
Among the following which turbine requires more head? |
| A. | Pelton Turbine |
| B. | Kaplan Turbine |
| C. | Francis turbine |
| D. | Tube Turbine |
| Answer» A. Pelton Turbine | |
| 538. |
Total head of turbines is_ |
| A. | Pressure head + Static head |
| B. | Kinetic head + Static head |
| C. | Static head + Pressure head |
| D. | Pressure head + Kinetic head + Static head |
| Answer» D. Pressure head + Kinetic head + Static head | |
| 539. |
Head under which Kaplan turbine is operated |
| A. | 10-70 meters |
| B. | 70 -100 meters |
| C. | 100-200 meters |
| D. | Above 200 meters |
| Answer» A. 10-70 meters | |
| 540. |
Head under which Francis turbine is operated |
| A. | 10-70 meters |
| B. | 70-100 meters |
| C. | 100-200 meters |
| D. | 40 -600 meters |
| Answer» D. 40 -600 meters | |
| 541. |
The turbine is preferred for 0 to 25 m head of water? |
| A. | Pelton wheel |
| B. | Kaplan turbine |
| C. | Tube turbine |
| D. | Francis turbine |
| Answer» B. Kaplan turbine | |
| 542. |
Under what head is Pelton turbine operated? |
| A. | 20-50 meters |
| B. | 15-2000 meters |
| C. | 60-200 meters |
| D. | 50-500 meters |
| Answer» B. 15-2000 meters | |
| 543. |
is difference between head race and tail race |
| A. | Gross head |
| B. | Net head |
| C. | Net positive suction head |
| D. | Manometric head |
| Answer» A. Gross head | |
| 544. |
The head available at inlet of turbine |
| A. | Net positive suction head |
| B. | Gross head |
| C. | Net head |
| D. | Manometric head |
| Answer» C. Net head | |
| 545. |
Head lost due to friction is given by k*f*L*v*v/D*2g where f- friction coefficient, L- length of pen stock, D- diameter of penstock and” k” is constant and its value is |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» C. 4 | |
| 546. |
The difference between gross head and friction losses is |
| A. | Net head |
| B. | Gross head |
| C. | Manometric head |
| D. | Net positive suction head |
| Answer» A. Net head | |
| 547. |
is defined as ratio between power delivered to runner and power supplied at inlet of turbine. |
| A. | Mechanical efficiency |
| B. | Volumetric efficiency |
| C. | Hydraulic efficiency |
| D. | Overall efficiency |
| Answer» C. Hydraulic efficiency | |
| 548. |
Which among the following which is not an efficiency of turbine? |
| A. | Mechanical efficiency |
| B. | Volumetric efficiency |
| C. | Hydraulic efficiency |
| D. | Electrical efficiency |
| Answer» D. Electrical efficiency | |
| 549. |
The ratio of power at the shaft of turbine and power delivered by water to runner is known as? |
| A. | Mechanical efficiency |
| B. | Volumetric efficiency |
| C. | Hydraulic efficiency |
| D. | Overall efficiency |
| Answer» A. Mechanical efficiency | |
| 550. |
The product of mechanical efficiency and hydraulic efficiency is known as? |
| A. | Mechanical efficiency |
| B. | Volumetric efficiency |
| C. | Hydraulic efficiency |
| D. | Overall efficiency |
| Answer» D. Overall efficiency | |
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