MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Thermal Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The steam pressure that acts on the exhaust side of the piston is known as _____ |
| A. | Cylinder Pressure |
| B. | Base Pressure |
| C. | Piston Pressure |
| D. | Back Pressure |
| Answer» E. | |
| 2. |
Which of the following is the correct formula for calculating swept volume (of a reciprocating steam engine)? (L Piston Stroke, D Diameter of the piston) |
| A. | ( frac{ }{4} ) L<sup>2</sup> D |
| B. | ( frac{ }{4} ) D<sup>2</sup> L |
| C. | ( frac{ }{4} ) L<sup>3</sup> |
| D. | ( frac{ }{4} ) D<sup>3</sup> |
| Answer» C. ( frac{ }{4} ) L<sup>3</sup> | |
| 3. |
Which of the following component of a reciprocating steam engine keeps the speed of the crankshaft constant over a period, when there is variation of load on the engine? |
| A. | Flywheel |
| B. | Governor |
| C. | Eccentric |
| D. | Piston |
| Answer» C. Eccentric | |
| 4. |
Flywheel is used in a reciprocating steam engine to maintain constant angular motion. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
The cylindrical grooved pulley of the eccentric, which is fixed on the crankshaft is called _____ |
| A. | Strap |
| B. | Sheaf |
| C. | Sheave |
| D. | Eccentric pulley |
| Answer» D. Eccentric pulley | |
| 6. |
In a reciprocating steam engine, what is the function of an eccentric? |
| A. | It converts the rotary motion of the D-slide valve into the reciprocating motion of the crankshaft |
| B. | It converts the reciprocating motion of the D-slide valve into the rotary motion of the crankshaft |
| C. | It converts the reciprocating motion of the crankshaft into the rotary motion of the D-slide valve |
| D. | It converts the rotary motion of the crankshaft into the reciprocating motion of the D-slide valve |
| Answer» E. | |
| 7. |
Which of the following statements about bearings (used to support crankshaft) is FALSE? |
| A. | Split-type bearings are used |
| B. | Bearings need lubrication |
| C. | The portion of the crankshaft in the bearing is called journal |
| D. | Bearings are used to stop the rotation of the crankshaft |
| Answer» E. | |
| 8. |
Which of the following statements regarding the radius of a crank (of a reciprocating steam engine) is true? |
| A. | Thrice the radius of the crank is equal to the stroke of the piston |
| B. | One-third the radius of the crank is equal to the stroke of the piston |
| C. | Twice the radius of the crank is equal to the stroke of the piston |
| D. | half the radius of the crank is equal to the stroke of the piston |
| Answer» D. half the radius of the crank is equal to the stroke of the piston | |
| 9. |
What is the function of a crank shaft? |
| A. | It converts the reciprocating motion of the piston into rotary motion of the crankshaft |
| B. | It converts the rotary motion of the crankshaft into reciprocating motion of the piston |
| C. | It converts the rotary motion of the piton into reciprocating motion of the crankshaft |
| D. | It converts the reciprocating motion of the crank shaft into rotary motion of the piston |
| Answer» B. It converts the rotary motion of the crankshaft into reciprocating motion of the piston | |
| 10. |
Which of the following statements about connecting rod is FALSE? |
| A. | It converts the reciprocating motion of the piston rod into circular motion of the crankshaft |
| B. | The length of the connecting rod is half the length of the piston stroke |
| C. | It is connected to the cross-head by means of a gudgeon pin or a wrist pin |
| D. | It is connected to the crank by means of a crank pin |
| Answer» C. It is connected to the cross-head by means of a gudgeon pin or a wrist pin | |
| 11. |
One of the ends of the connecting rod is connected to the cross-head by means of a pin known as crank pin. |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
In a reciprocating steam engine, the connecting rod is connected to the crank by means of a pin called _____ |
| A. | Crank pin |
| B. | Gudgeon pin |
| C. | Wrist pin |
| D. | U-pin |
| Answer» B. Gudgeon pin | |