MCQOPTIONS
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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.
| 3451. |
The water tube boilers produce steam at a __________ pressure than that of fire tube boilers. |
| A. | lower |
| B. | higher |
| Answer» C. | |
| 3452. |
Steam engines are called external combustion engines. |
| A. | Yes |
| B. | No |
| Answer» B. No | |
| 3453. |
A good steam boiler is one which produces maximum quantity of steam with the given fuel |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 3454. |
Cut-off ratio is the ratio of |
| A. | swept volume to the volume at cut-off |
| B. | volume at cut-off to the clearance volume |
| C. | volume at cut-off to the swept volume |
| D. | clearance volume to the volume at cut-off |
| Answer» D. clearance volume to the volume at cut-off | |
| 3455. |
For maximum discharge through a chimney, the temperature of flue gases inside the chimney should the slightly more than the atmospheric temperature. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 3456. |
The internal flue tubes of a Lancashire boiler are reduced in diameter at the back to provide access to the lower part of the boiler. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3457. |
A device in which some portion of waste heat of flue gases is recovered to heat the air before it passes to the furnace for combustion purpose, is knwon as |
| A. | superheater |
| B. | air preheater |
| C. | economiser |
| D. | injector |
| Answer» C. economiser | |
| 3458. |
In a fire tube boiler, the water is contained inside the tubes which are surrounded by flames and hot gases from outside. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3459. |
A Tandem type compound engine requires a larger flywheel. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3460. |
An economiser is installed in a boiler primarily to |
| A. | superheat the steam |
| B. | reduce fuel consumption |
| C. | increase steam pressure |
| D. | all of these |
| Answer» C. increase steam pressure | |
| 3461. |
The fire tubes in a Cochran boiler usually have __________ diameter. |
| A. | 6.25 mm |
| B. | 62.5 mm |
| C. | 72.5 mm |
| D. | 92.5 mm |
| Answer» C. 72.5 mm | |
| 3462. |
A compound steam engine in which piston rods of high pressure and low pressure cylinders ' are attached to two different cranks set at 180 to each other, is called |
| A. | receiver type compound engine |
| B. | Tandem type compound engine |
| C. | Woolf type compound engine |
| D. | both (a) and (b) |
| Answer» D. both (a) and (b) | |
| 3463. |
The heat balance sheet for the boiler shows the |
| A. | complete account of heat supplied by 1 kg of dry fuel and the heat consumed |
| B. | moisture present in the fuel |
| C. | steam formed by combustion of hygrogen per kg of fuel |
| D. | all of the above |
| Answer» B. moisture present in the fuel | |
| 3464. |
The performance of a boiler is measured by the |
| A. | amount of water evaporated per hour |
| B. | steam produced in kg/h |
| C. | steam produced in kg/kg of fuel burnt |
| D. | all of these |
| Answer» E. | |
| 3465. |
The evaporative capacity of a boiler is defined as the evaporation of 15.653 kg of water per hour from and at 100 C. |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 3466. |
The maximum heat loss is a boiler occurs due to |
| A. | moisture in fuel |
| B. | dry flue gases |
| C. | steam formation |
| D. | unburnt carbon |
| Answer» C. steam formation | |
| 3467. |
The function of a governor is to keep the engine speed uniform at all load conditions. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 3468. |
The efficiency of the plant __________ with the mechanical draught. |
| A. | increases |
| B. | decreases |
| C. | remains constant |
| Answer» B. decreases | |
| 3469. |
Bulk modulus of a fluid is the ratio of |
| A. | shear stress to shear strain |
| B. | increase in volume to the viscosity of fluid |
| C. | increase in pressure to the volumetric strain |
| D. | critical velocity to the viscosity of fluid |
| Answer» D. critical velocity to the viscosity of fluid | |
| 3470. |
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 | |
| 3471. |
The mercury does not wet the glass. This is due to the property of the liquid known as |
| A. | cohesion |
| B. | adhesion |
| C. | viscosity |
| D. | surface tension |
| Answer» E. | |
| 3472. |
The coefficient of discharge in case of internal mouthpiece is __________ that of external mouthpiece. |
| A. | less than |
| B. | more than |
| Answer» B. more than | |
| 3473. |
When the venturimeter is inclined, then for a given flow it will show __________ reading. |
| A. | same |
| B. | more |
| C. | less |
| Answer» B. more | |
| 3474. |
The discharge through a channel of rectangular section will be maximum, if |
| A. | its depth is twice the breadth |
| B. | its breadth is twice the depth |
| C. | its depth is thrice the breadth |
| D. | its breadth is thrice the depth |
| Answer» C. its depth is thrice the breadth | |
| 3475. |
The specific weight is also known as weight density. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 3476. |
In a lockgate, the reaction between two gates is (where P = Resultant pressure on the lock gate, and = Inclination of the gate with the normal to the side of the lock) |
| A. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/153-71-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/153-71-2.png"> |
| C. | P / 2sin |
| D. | <!-- img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/153-71-3.png" //--> |
| E. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/153-71-4.png"> |
| Answer» D. <!-- img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/153-71-3.png" //--> | |
| 3477. |
The velocity of the liquid flowing through the divergent portion of a venturimeter |
| A. | remains constant |
| B. | increases |
| C. | decreases |
| D. | depends upon mass of liquid |
| Answer» D. depends upon mass of liquid | |
| 3478. |
In a broad-crested weir, the discharge is maximum if the head of water on the downstream side of weir is __________ the head of water on the upstream side of weir. |
| A. | equal to |
| B. | one-third |
| C. | two-third |
| D. | three-fourth |
| Answer» D. three-fourth | |
| 3479. |
Bernoulli's equation is applied to |
| A. | venturimeter |
| B. | orifice meter |
| C. | pitot tube |
| D. | all of these |
| Answer» E. | |
| 3480. |
A fluid having no viscosity is known as |
| A. | real fluid |
| B. | ideal fluid |
| C. | newtonian fluid |
| D. | non-newtonian fluid |
| Answer» C. newtonian fluid | |
| 3481. |
In the manufacturing of lead shots, the property of surface tension is utilised. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 3482. |
The total pressure on the top of a closed cylindrical vessel of radius (r) completely filled up with liquid of specific weight (w) and rotating at ( ) rad/s about its vertical axis, is |
| A. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/174-295-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/174-295-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/174-295-3.png"> |
| D. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/174-295-4.png"> |
| Answer» D. <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/174-295-4.png"> | |
| 3483. |
A flow is called super-sonic if the |
| A. | velocity of flow is very high |
| B. | discharge is difficult to measure |
| C. | Mach number is between 1and 6 |
| D. | none of these |
| Answer» D. none of these | |
| 3484. |
An opening in the side of a tank or vessel such that the liquid surface with the tank is below the top edge of the opening, is called |
| A. | weir |
| B. | notch |
| C. | orifice |
| D. | none of these |
| Answer» C. orifice | |
| 3485. |
According to Newton's law of viscosity, the shear stress on a layer of a fluid is __________ to the rate of shear strain. |
| A. | equal to |
| B. | directly proportional |
| C. | inversely proportional |
| Answer» C. inversely proportional | |
| 3486. |
Venturimeter is used to |
| A. | measure the velocity of a flowing liquid |
| B. | measure the pressure of a flowing liquid |
| C. | measure the discharge of liquid flowing in a pipe |
| D. | measure the pressure difference of liquid flowing between two points in a pipe line |
| Answer» D. measure the pressure difference of liquid flowing between two points in a pipe line | |
| 3487. |
A hemispherical tank of radius (R) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to lower the level of liquid from (H1) to (H2) will be |
| A. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/162-166-1.png"> |
| B. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/162-166-2.png"> |
| C. | <img src="/_files/images/mechanical-engineering/hydraulics-and-fluid-mechanics/162-166-3.png"> |
| D. | none of the above |
| Answer» D. none of the above | |
| 3488. |
The force present in a moving liquid is |
| A. | inertia force |
| B. | viscous force |
| C. | gravity force |
| D. | all of these |
| Answer» E. | |
| 3489. |
The force per unit length is the unit of |
| A. | surface tension |
| B. | compressibility |
| C. | capillarity |
| D. | viscosity |
| Answer» B. compressibility | |
| 3490. |
Kinematic viscosity is the product of dynamic viscosity and the density of the liquid. |
| A. | Yes |
| B. | No |
| Answer» C. | |
| 3491. |
A notch is, usually, made of a metallic plate. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 3492. |
In an internal mouthpiece, if the jet after contraction expands and fills up the whole mouthpiece, then the mouthpiece is said to be running free. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3493. |
A channel is said to be of most economical cross-section, if |
| A. | it gives maximum discharge for a given cross-sectional area and bed slope |
| B. | it has minimum wetted perimeter |
| C. | it involves lesser excavation for the designed amount of discharge |
| D. | all of the above |
| Answer» E. | |
| 3494. |
A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a |
| A. | notch |
| B. | weir |
| C. | mouthpiece |
| D. | nozzle |
| Answer» D. nozzle | |
| 3495. |
The pressure at a stagnation point is always low. |
| A. | Agree |
| B. | Disagree |
| Answer» C. | |
| 3496. |
When an internal mouthpiece is running full, the discharge through the mouthpiece is twice the discharge when it is running free. |
| A. | Correct |
| B. | Incorrect |
| Answer» C. | |
| 3497. |
In two dimensional flow, the flow does not take place in a curve. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3498. |
The discharge through a channel of circular section will be maximum when the depth of water is __________ the diameter of the circular channel. |
| A. | 0.34 times |
| B. | 0.67 times |
| C. | 0.81 times |
| D. | 0.95 times |
| Answer» E. | |
| 3499. |
When the Mach number is more than 6, the flow is called |
| A. | sub-sonic flow |
| B. | sonic flow |
| C. | super-sonic flow |
| D. | hyper-sonic flow |
| Answer» E. | |
| 3500. |
Poise is the unit of viscosity in C.G.S. system of units. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |