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MCQOPTIONS
This section includes 832 Mcqs, each offering curated multiple-choice questions to sharpen your Automobile Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 701. |
Barometer is used to measure |
| A. | Pressure in pipes, channels etc. |
| B. | Atmospheric pressure |
| C. | Very low pressure |
| D. | Difference of pressure between two points |
| Answer» C. Very low pressure | |
| 702. |
Differential manometer is used to measure |
| A. | Pressure in pipes, channels etc. |
| B. | Atmospheric pressure |
| C. | Very low pressure |
| D. | Difference of pressure between two points |
| Answer» E. | |
| 703. |
Piezometer is used to measure |
| A. | Pressure in pipe, channels etc. |
| B. | Atmospheric pressure |
| C. | Very low pressures |
| D. | Difference of pressure between two points |
| Answer» D. Difference of pressure between two points | |
| 704. |
In a centrifugal pump, the regulating valve is provided on the |
| A. | Casing |
| B. | Delivery pipe |
| C. | Suction pipe |
| D. | Impeller |
| Answer» C. Suction pipe | |
| 705. |
The loss of pressure head in case of laminar flow is proportional to |
| A. | Velocity |
| B. | (Velocity)2 |
| C. | (Velocity)3 |
| D. | (Velocity)4 |
| Answer» B. (Velocity)2 | |
| 706. |
The velocity of jet of water traveling out of opening in a tank filled with water is proportional to |
| A. | Head of water (h) |
| B. | h² |
| C. | V/T |
| D. | h/2 |
| Answer» D. h/2 | |
| 707. |
Saving of work done and power by fitting an air vessel to single acting reciprocating pump is of the order of |
| A. | 39.2% |
| B. | 49.2% |
| C. | 68.8% |
| D. | 84.8% |
| Answer» E. | |
| 708. |
Saving of work done and power by fitting an air vessel to double acting reciprocating pump is of the order of |
| A. | 39.2% |
| B. | 49.2% |
| C. | 68.8% |
| D. | 84.8% |
| Answer» B. 49.2% | |
| 709. |
The mass of 2.5 m3 of a certain liquid is 2 tonnes. Its mass density is |
| A. | 200 kg/m3 |
| B. | 400 kg/m3 |
| C. | 600 kg/m3 |
| D. | 800 kg/m3 |
| Answer» E. | |
| 710. |
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 | |
| 711. |
Liquids transmit pressure equally in all the directions. This is according to |
| A. | Boyle's law |
| B. | Archimedes principle |
| C. | Pascal's law |
| D. | Newton's formula |
| Answer» D. Newton's formula | |
| 712. |
The ratio of the inertia force to the viscous force is called |
| A. | Reynold's number |
| B. | Froude's number |
| C. | Weber's number |
| D. | Euler's number |
| Answer» B. Froude's number | |
| 713. |
According to fan laws, for fans having constant wheel diameter, the air or gas capacity varies |
| A. | Directly as fan speed |
| B. | Square of fan speed |
| C. | Cube of fan speed |
| D. | Square root of fan speed |
| Answer» B. Square of fan speed | |
| 714. |
Francis turbine is best suited for |
| A. | Medium head application from 24 to 180 m |
| B. | Low head installation up to 30 m |
| C. | High head installation above 180 m |
| D. | All types of heads |
| Answer» B. Low head installation up to 30 m | |
| 715. |
Flow occurring in a pipeline when a valve is being opened is |
| A. | Steady |
| B. | Unsteady |
| C. | Laminar |
| D. | Vortex |
| Answer» C. Laminar | |
| 716. |
Indicator diagram of a reciprocating pump is a graph between |
| A. | Flow vs. swept volume |
| B. | Pressure in cylinder vs. swept volume |
| C. | Flow vs. speed |
| D. | Pressure vs. speed |
| Answer» C. Flow vs. speed | |
| 717. |
The divergent portion of a Venturimeter is made longer than convergent portion in order to |
| A. | Avoid the tendency of breaking away the stream of liquid |
| B. | To minimize frictional losses |
| C. | Both (A) and (B) |
| D. | None of these |
| Answer» D. None of these | |
| 718. |
Reynold's number is the ratio of the inertia force to the |
| A. | Surface tension force |
| B. | Viscous force |
| C. | Gravity force |
| D. | Elastic force |
| Answer» C. Gravity force | |
| 719. |
When a piping system is made up primarily of friction head and very little of vertical lift, then pump characteristics should be |
| A. | Horizontal |
| B. | Nearly horizontal |
| C. | Steep |
| D. | First rise and then fall |
| Answer» C. Steep | |
| 720. |
When a piping system is made up primarily of vertical lift and very little pipe friction, the pump characteristics should be |
| A. | Horizontal |
| B. | Nearly horizontal |
| C. | Steep |
| D. | First rise and then fall |
| Answer» D. First rise and then fall | |
| 721. |
Dimensions of surface tension are |
| A. | ML°T⁻² |
| B. | ML°T |
| C. | ML r² |
| D. | ML²T² |
| Answer» B. ML°T | |
| 722. |
The pressure at a point 4 m below the free surface of water is |
| A. | 19.24 kPa |
| B. | 29.24 kPa |
| C. | 39.24 kPa |
| D. | 49.24 kPa |
| Answer» D. 49.24 kPa | |
| 723. |
The flow in a pipe is turbulent when Reynold number is |
| A. | Less than 2000 |
| B. | Between 2000 and 2800 |
| C. | More than 2800 |
| D. | None of these |
| Answer» D. None of these | |
| 724. |
The flow in a pipe is neither laminar nor turbulent when Reynold number is |
| A. | Less than 2000 |
| B. | Between 2000 and 2800 |
| C. | More than 2800 |
| D. | None of these |
| Answer» C. More than 2800 | |
| 725. |
The mass per unit volume of a liquid at a standard temperature and pressure is called |
| A. | Specific weight |
| B. | Mass density |
| C. | Specific gravity |
| D. | None of these |
| Answer» C. Specific gravity | |
| 726. |
Choose the correct relationship |
| A. | Specific gravity = gravity × density |
| B. | Dynamic viscosity = kinematic viscosity × density |
| C. | Gravity = specific gravity × density |
| D. | Kinematic viscosity = dynamic viscosity × density |
| Answer» C. Gravity = specific gravity × density | |
| 727. |
The bulk modulus of elasticity with increase in pressure |
| A. | Increases |
| B. | Decreases |
| C. | Remain constant |
| D. | Increases first up to certain limit and then decreases |
| Answer» B. Decreases | |
| 728. |
Which of the following is not a reaction turbine? |
| A. | Fourneyron turbine |
| B. | Journal turbine |
| C. | Thomson's turbine |
| D. | Pelton wheel |
| Answer» E. | |
| 729. |
The Thomson's turbine is _________ reaction turbine. |
| A. | An axial flow |
| B. | An inward flow |
| C. | An outward flow |
| D. | A mixed flow |
| Answer» C. An outward flow | |
| 730. |
The Fourneyron turbine is _________ reaction turbine. |
| A. | An axial flow |
| B. | An inward flow |
| C. | An outward flow |
| D. | A mixed flow |
| Answer» D. A mixed flow | |
| 731. |
Multistage centrifugal pumps are used to obtain |
| A. | High discharge |
| B. | High head |
| C. | Pumping of viscous fluids |
| D. | High head and high discharge |
| Answer» C. Pumping of viscous fluids | |
| 732. |
The undershot water wheels are those in which |
| A. | The wheel runs entirely by the weight of water |
| B. | The wheel runs entirely by the impulse of water |
| C. | The wheel runs partly by the weight of water and partly by the impulse of water |
| D. | None of the above |
| Answer» C. The wheel runs partly by the weight of water and partly by the impulse of water | |
| 733. |
In an immersed body, centre of pressure is |
| A. | At the centre of gravity |
| B. | Above the centre of gravity |
| C. | Below be centre of gravity |
| D. | Could be above or below e.g. depending on density of body and liquid |
| Answer» D. Could be above or below e.g. depending on density of body and liquid | |
| 734. |
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 | |
| 735. |
According to fan laws, at constant speed and capacity, the pressure and power vary |
| A. | Directly as the air or gas density |
| B. | Inversely as square root of density |
| C. | Inversely as density |
| D. | As square of density |
| Answer» B. Inversely as square root of density | |
| 736. |
The product of mass and acceleration of flowing liquid is called |
| A. | Inertia force |
| B. | Viscous force |
| C. | Gravity force |
| D. | Pressure force |
| Answer» B. Viscous force | |
| 737. |
The property by virtue of which a liquid opposes relative motion between its different layers is called |
| A. | Surface tension |
| B. | Coefficient of viscosity |
| C. | Viscosity |
| D. | Osmosis |
| Answer» D. Osmosis | |
| 738. |
When a body is placed over a liquid, it will float if |
| A. | Gravitational force is equal to the up-thrust of the liquid |
| B. | Gravitational force is less than the up-thrust of the liquid |
| C. | Gravitational force is more than the up-thrust of the liquid |
| D. | None of the above |
| Answer» C. Gravitational force is more than the up-thrust of the liquid | |
| 739. |
To avoid vaporisation in the pipe line, the pipe line over the ridge is laid such that it is not more than |
| A. | 2.4 m above the hydraulic gradient |
| B. | 6.4 m above the hydraulic gradient |
| C. | 10.0 m above the hydraulic gradient |
| D. | 5.0 above the hydraulic gradient |
| Answer» C. 10.0 m above the hydraulic gradient | |
| 740. |
The speed ratio in case of Francis turbine varies from |
| A. | 0.15 to 0.3 |
| B. | 0.4 to 0.5 |
| C. | 0.6 to 0.9 |
| D. | 1 to 1.5 |
| Answer» D. 1 to 1.5 | |
| 741. |
The flow ratio in case of Francis turbine varies from |
| A. | 0.15 to 0.3 |
| B. | 0.4 to 0.5 |
| C. | 0.6 to 0.9 |
| D. | 1 to 1.5 |
| Answer» B. 0.4 to 0.5 | |
| 742. |
The power developed by a turbine is (where H = Head of water under which the turbine is working) |
| A. | Directly proportional to H1/2 |
| B. | Inversely proportional to H1/2 |
| C. | Directly proportional to H3/2 |
| D. | Inversely proportional to H3/2 |
| Answer» D. Inversely proportional to H3/2 | |
| 743. |
An impulse turbine is used for |
| A. | Low head of water |
| B. | High head of water |
| C. | Medium head of water |
| D. | High discharge |
| Answer» C. Medium head of water | |
| 744. |
A piece of wood having weight 5 kg floats in water with 60% of its volume under the liquid. The specific gravity of wood is |
| A. | 0.83 |
| B. | 0.6 |
| C. | 0.4 |
| D. | 0.3 |
| Answer» C. 0.4 | |
| 745. |
Runaway speed of a hydraulic turbine is |
| A. | Full load speed |
| B. | The speed at which turbine runner will be damaged |
| C. | The speed if the turbine runner is allowed to revolve freely without load and with the wicket gates wide open |
| D. | The speed corresponding to maximum overload permissible |
| Answer» D. The speed corresponding to maximum overload permissible | |
| 746. |
The increase of temperature results in |
| A. | Increase in viscosity of gas |
| B. | Increase in viscosity of liquid |
| C. | Decrease in viscosity of gas |
| D. | Decrease in viscosity of liquid |
| Answer» E. | |
| 747. |
The flow rate in gear pump |
| A. | Increases with increase in pressure |
| B. | Decreases with increase in pressure |
| C. | More or less remains constant with increase in pressure |
| D. | Unpredictable |
| Answer» D. Unpredictable | |
| 748. |
In reaction turbine, draft tube is used |
| A. | To transport water downstream without eddies |
| B. | To convert the kinetic energy to flow energy by a gradual expansion of the flow cross-section |
| C. | For safety of turbine |
| D. | To increase flow rate |
| Answer» C. For safety of turbine | |
| 749. |
In a reaction turbine, the draft tube is used |
| A. | To run the turbine full |
| B. | To prevent air to enter the turbine |
| C. | To increase the head of water by an amount equal to the height of the runner outlet above the tail race |
| D. | To transport water to downstream |
| Answer» D. To transport water to downstream | |
| 750. |
The torque required to overcome viscous resistance of a collar bearing is (where R1 and R2 = External and internal radius of collar) |
| A. | (μπ²N/60t) × (R₁ - R₂) |
| B. | (μπ²N/60t) × (R₁² - R₂²) |
| C. | μπ²N/60t) × (R₁³ - R₂³) |
| D. | (μπ²N/60t) × (R₁⁴ - R₂⁴) |
| Answer» E. | |