Related Questions

Consider the following statements: In case of helical gears, teeth are cut at an angle to the axis of rotation of the gears. 1) Helix angle introduces another ratio called axial contact ratio. 2) Transverse contact ratio is equal to axial contact ratio in helical gears. 3) Large transverse contact ratio does not allow multiple teeth to share the load. 4) Large axial contact ratio will cause larger axial force component Which of the above statements are correct?
Pharmacists recently conducted a study with respect to the reasons their customers purchased eye drops to soothe eye dryness. Dry eyes were more frequently experienced by customers who wore contact lenses than by custorners who did not wear contact lenses. The pharmacists concluded that wearing contact lenses, by itself, can cause contact wearers to have dry eyes.
Which of the following statement(s) is/are CORRECT for antigen activated effector T cells?
P. CD4+ cells make contact with macrophages and stimulate their microbicidal activity.
Q. CD4+ cells make contact with B cells and stimulate them to differentiate into plasma cells.
R. CD8+ cells make contact with B cells and stimulate them to differentiate into plasma cells.
S. CD8+ cells make contact with virus infected cells and kill them.
If the contact ratio is 2.7, two pairs of teeth are always in contact and three pairs of teeth are in contact for _________ % of the time.
One end of the ladder is in contact with a wall and the other end is in contact with level ground making an angle of 40° when the foot of the ladder is moved through a distance ‘x’ m away from the wall, the end in contact with wall sides ‘3m’ along the wall and the angle made by the ladder with the level is, now 20°. Then, find the value of x?
Consider the following statements 1. The electrostatic force is an example of a contact force. 2. The frictional force is an example of a contact force. 3. The nuclear force is an example of a contact force. Which of the following statements is/are correct?
Consider the following statements: Kinetic friction is the frictional force that opposes the motion of two surfaces in contact. The static friction is independent of the area of contact. The kinetic friction depends upon the area of contact.  fs = μsN always. Which of the above statements are correct.
Are these statements about the contact equilibrium processes true? Statement 1: Gas absorption, crystallization comes under the category of contact equilibrium processes. Statement 2: Contact equilibrium processes does not depend on the concentration gradient.
Given below are three quantities named A, B and C. Based on the given information, determine the relation among the three quantities. Quantity A∶  A 30 litre mixture of wine and water has wine and water in the ratio 5∶ 7. How much water must be drawn off so that the ratio of wine and water becomes 25∶ 19? Quantity B∶ A 35 litre mixture of wine and water has wine and water in the ratio 1∶ 3. How much water must be drawn off so that the ratio of wine and water becomes 1.75∶ 3.35? Quantity C∶ A 27 litre mixture of wine and water has wine and water in the ratio 3∶ 2. How much water must be drawn off so that the ratio of wine and water becomes 81∶ 11?
The contact ratio is the ratio of arc of contact to the ____________