Bissoy.com
Doctors Medicines MCQs Q&A

Consider the following pairs regarding plastics and their respective characteristics: 1. Polycarbonate: Poor impact resistance 2. PTFE: Low coefficient of friction 3. Polypropylene: Excellent fatigue strength Which of the above pairs is/are correctly matched?

Consider the following pairs regarding plastics and their respective characteristics: 1. Polycarbonate: Poor impact resistance 2. PTFE: Low coefficient of friction 3. Polypropylene: Excellent fatigue strength Which of the above pairs is/are correctly matched? Correct Answer 2 and 3

Common plastics their respective characteristics and usage is shown below in the table:

Material Type

Major application characteristics

Typical Applications

Polycarbonates

Dimensionally stable, low water absorption, transparent, very good impact resistance and ductility, chemical resistance not outstanding

Safety helmets, lenses, light globes, the base for photographic film, automobile battery cases

PTFE or TFE

Chemically inert in almost all environments, excellent electrical properties, low coefficient of friction may be used to 260°C, relatively weak and poor cold-flow properties

Anticorrosive seals, chemical pipes and valves, bearings, wire and cable insulation, antiadhesive coatings, high-temperature electronic parts

Polypropylenes

Resistant to heat distortion, excellent electrical properties and fatigue strength, chemically inert, relatively inexpensive poor resistance to ultraviolet light

Sterilizable bottles, packaging film, automotive kick panels, fibers, luggage

Related Questions

Consider the following statements: 1. According to Terzaghi, the average angle of wall friction may be taken equal to two-thirds of the respective angle of internal friction. 2. Wall friction increases the active earth Pressure and also decreases the passive earth resistance of the soil 3. Wall friction decreases the active earth pressure and increases the passive earth resistance of the soil. Which of the above statements is/are Correct?
The influence of shape of aggregate in strength and workability of concrete are given below in statements S1, S2, S3 and S4. Which of the statements are correct? S1: Rounded aggregate produces concrete with high workability and low strength. S2: Angular aggregate produces concrete with high workability and low strength. S3: Rounded aggregate produces concrete with low workability and high strength. S4: Angular aggregate produces concrete with low workability and high strength.
Which of the following is NOT true about Frictional force? A. Friction is the force which opposes the relative motion of two surfaces in contact. B. The force of friction that acts when a body is moving (sliding) on a surface is called sliding friction. C. Friction in machines wastes energy and also causes wear and tear. D. Rolling friction is much more than sliding friction, the use of ball bearings in a machine considerably reduces friction.
There are two sets given below in which Set I offers types of learner's characteristics and Set II gives their description. Match the two sets:   Set I (Learner’s   Characteristics)    Set II (Description) a. Academic Characteristics i. Learner encodes and decodes relevant messages correctly b. Social Characteristics ii. Learner selects different themes in his/her course when needed c. Emotional Characteristics iii. Learner works as a team member of the peers d. Cognitive Characteristics iv. Learner starts respecting the individual differences evident in likes and dislikes of members of his class Choose the correct answer from the following options:
Consider the following statements: 1. The kinetic friction is always less than the rolling friction. 2. The kinetic friction is always equal to the rolling friction. 3. The kinetic friction is always greater than the rolling friction. Which of the following statement is correct?
With reference to the Superalloy, consider the following statements: 1. It is an alloy that exhibits excellent mechanical strength and resistance to creep at low temperatures. 2. Base alloying element of Superalloy is usually nickel, cobalt, or nickel-iron. 3. It develops low-temperature strength through solid solution strengthening.  Which of the above statement is/are correct?
To pass a test, a candidate needs to answer at least 2 out of 3 questions correctly. A total of 6,30,000 candidates appeared for the test. Question A was correctly answered by 3,30,000 candidates. Question B was answered correctly by 2,50,000 candidates. Question C was answered correctly by 2,60,000 candidates. Both questions A and B were answered correctly by 1,00,000 candidates. Both questions B and C were answered correctly by 90,000 candidates. Both questions A and C were answered correctly by 80,000 candidates. If the number of students answering all questions correctly is the same as the number answering none, how many candidates failed to clear the test?
Consider the following pairs regarding ports and respective seas. 1. Murmansk - Barents Sea 2. St. Petersberg - Baltic Sea 3. Rostov - Japan Sea 4. Vladivostok - Black Sea Which of the pairs given above is/are correctly matched?
While discussing about friction, a teacher gave a number of examples to explain the concept. Some of the examples where friction is useful in our day-to-day life as quoted by the teacher are given below : A. We are able to write because of friction between the tip of the pen and the paper. B. We are able to walk because of friction between our feet and the ground. C. A ball thrown vertically upwards comes back to us due to friction. D. We are able to stop a moving vehicle by applying brakes because of friction. The correct examples were
The following are the conditions for selecting list of a suitable candidates to be called for interview after the written test for the recruitment is conducted/ organized for management-level persons of a multi-national company. For providing accounting services and sales the candidates must (a) be holding a graduation in basic science with 65% or above or B. E degree with 55% and above marks (b) have passed the written test with 70% or above marks (c) the age must be in the group 25 to 30 years as on 1/4/18 (d) have experience in an accounting firms for three years and diploma in accounting with 60% or above marks (e) be presently drawing CTC of 6 Lakhs per annum and above In case the applicant who satisfies all other terms above except 1) at (a) above, then be referred as Junior Accountant 2) at (d) & (e) above then be referred as Trainee-Accountant Satisfying all the above with experience of 5 years then be referred as senior-Accountant Satisfying all the above criteria (a-e) with CA/ ICWA / MBA (Finance) then be refereed as manager (Accounts) Read all the above information and answer the following question Shravani has passed H. SC with 72% of marks. She has done diploma in accountancy with 62% of marks. She was working with an organization in the field of accounting in the field of accounting from 4 years and was drawing CTC of 6.5 Lakhs presently. She is 28yrs as on July 2018. She may referred for the position of: