Assertion (A) : The single thread tensile strength tester works on pendulum lever principle.
Reason (R) : The force acting on the specimen is directly proportional to the sine of the angle through which the pendulum is lifted from its vertical rest position.
In the light of the above statements, choose the most appropriate answer from the options given below :
Analyzing Tensile Strength Tester: Pendulum Lever Principle
This question involves evaluating two statements about the working principle of a single thread tensile strength tester.
Assertion (A) Analysis
Assertion (A) states that the single thread tensile strength tester works on the pendulum lever principle. Many tensile strength testers, particularly those used for materials like paper (e.g., Elmendorf testers), utilize a pendulum mechanism. The breaking of the specimen causes a change in the pendulum's position, which is then measured to determine the force. Therefore, this statement is correct.
Reason (R) Analysis
Reason (R) states that the force acting on the specimen is directly proportional to the sine of the angle through which the pendulum is lifted from its vertical rest position. In a pendulum system designed for force measurement, the torque exerted by the pendulum is often related to the angle $\theta$ from the vertical. For instance, the restoring torque due to gravity is proportional to $\sin(\theta)$. When this torque is balanced by the force applied to break the specimen, the force measured is indeed linked to the sine of the pendulum's angular displacement. This physical relationship is fundamental to how the pendulum lever principle is applied.
Evaluating the Explanation
The pendulum lever principle relies on measuring the force indirectly through the motion of a pendulum. Reason (R) precisely describes the physical relationship between the applied force (which causes the pendulum to move) and the resulting angular displacement ($\sin(\theta)$). This explains *how* the pendulum lever principle operates in this testing apparatus.
Conclusion
Since both Assertion (A) and Reason (R) are factually correct, and Reason (R) provides the underlying physical explanation for the operation described in Assertion (A), they are both correct and (R) is the correct explanation of (A).
Similar Questions
- Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : The yarn strength depends on the level of twist given in the final stage of ring spinning.
Reason (R) : Twist helps in binding the fibres through lateral pressure exerted by outer layers of fibres on the fibres in the core.
In the light of the above statements, choose the most appropriate answer from the options given below : - Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : The configuration and orientation of fibres in a yarn decides the uniformity of twisted yarn.
Reason (R) : The proper drafting in different stages of spinning changes the configuration and orientation of fibres.
In the light of the above statements, choose the most appropriate answer from the options given below : - Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Latch needles are self sufficient, no extra element is required for hook closure.
Reason (R) : When the needle moves up and down, the formed loop opens and closes the latch.
In the light of the above statements, choose the most appropriate answer from the options given below : - Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : The uneven dyeing leads to the poor appearance in case of cotton fabric.
Reason (R) : The mature cotton fibres poses the problems in uniform dyeing.
In the light of the above statements, choose the most appropriate answer from the options given below : - Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Polyester does not require desizing before dyeing.
Reason (R) : Polyester contains natural waxes and pectins.
In the light of the above statements, choose the most appropriate answer from the options given below : - In the draw texturising machine, the passage of yarn is :
A. primary heater
B. secondary heater
C. winding unit
D. creel
E. friction unit
Choose the correct answer from the options given below : - The sequence of processes involved in the chemical processing is :
A. scouring
B. finishing
C. dyeing
D. desizing
E. bleaching
Choose the correct answer from the options given below : - Melt spinning involves the continuous process for the multi-filament yarn manufacturing follows the sequence as :
A. melting of chips
B. quenching
C. extrusion of melt
D. drying of chips
E. winding on the bobbin
Choose the correct answer from the options given below : - The sequence of warp preparation for weaving is :
A. warping
B. sizing
C. winding
D. drawing and denting in
E. weaving
Choose the correct answer from the options given below : - The major parts of the sizing machine are arranged in the sequence as :
A. drying cylinder
B. beaming unit
C. creel
D. splitting rods
E. size Box
Choose the correct answer from the options given below :
Important Questions from Miscellaneous
- Which of the following scheduler/schedulers is/are also called CPU scheduler ?
(A). Short Term Scheduler
(B). Long Term Scheduler
(C). Medium Term Scheduler
(D). Asymmetric Scheduler
Choose the correct answer from the options given below: - A situation where two or more processes are blocked, waiting for resources held by each other is called:
- External fragmentation occurs ________.
- Which disk scheduling algorithm looks for the track closest to the current head position?
- Which CPU scheduling algorithm prefers the process with the shortest burst time?
