MCQOPTIONS
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MCQOPTIONS
This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Machine Dynamics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If θ is the angle turned by the cam from the beginning of the roller displacement, how the velocity changes with the change in theta? |
| A. | Increases with increase in theta |
| B. | Decreases with increase in theta |
| C. | Increases with negative change in theta |
| D. | Independent of theta |
| Answer» B. Decreases with increase in theta | |
| 2. |
Maximum acceleration of the follower is independent of the angle theta. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
From the given data, calculate the acceleration of follower in m/s2 at the beginning of the lift for a symmetrical tangent cam operating a roller follower.Least radius of the cam is 30 mm; Roller radius is 17.5 mm. The angle of ascent is 75° and the total lift is 17.5 mm. The speed of the cam shaft is 600 r.p.m. |
| A. | 187.6 |
| B. | 185.5 |
| C. | 183.2 |
| D. | 190.1 |
| Answer» B. 185.5 | |
| 4. |
If θ is the angle turned by the cam from the beginning of the roller displacement, then minimum acceleration pf the follower occurs at what value of θ in degrees? |
| A. | 0 |
| B. | 30 |
| C. | 45 |
| D. | 60 |
| Answer» B. 30 | |
| 5. |
In the given figure, the cam has contact with _______ |
| A. | Nose |
| B. | Straight flank |
| C. | Arm |
| D. | Shaft |
| Answer» B. Straight flank | |
| 6. |
What is the use of tangent cams? |
| A. | To operate inlet and exhaust valves of I C engines. |
| B. | To operate the inlet valve of I C engines |
| C. | To operate the exhaust valve of I C engines |
| D. | To operate the crankshaft of an IC engine |
| Answer» B. To operate the inlet valve of I C engines | |
| 7. |
Tangent cams are symmetric about __________ |
| A. | Centre line of cam shaft |
| B. | Tangent line of cam shaft |
| C. | Radial line of cam shaft |
| D. | Along the roller |
| Answer» B. Tangent line of cam shaft | |
| 8. |
Tangent cam with reciprocating follower is an example of cams with specified contours. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
When the flanks of the cam are straight and tangential to the base circle and nose circle, then the cam is known as a ____________ |
| A. | Tangent cam |
| B. | Reciprocating cam |
| C. | Roller cam |
| D. | Radial cam |
| Answer» B. Reciprocating cam | |