Engineering Sciences
2017 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE XE 2017 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 43–45 of 175. Imported answers require review unless explicitly marked reviewed.
Question 43
Open questionXE-CNAT2 marksNeeds review
The unit cell volume of polyethylene (PE) is 0.093 nm
. Assuming two ethylene repeat units are contained within each unit cell, the density of a totally crystalline PE will be .............. g/cm
(Take the atomic weights for carbon and hydrogen as 12.01 g/mol and 1.008 g/mol, respectively, and the Avogadro’s number as
repeat units/mol)Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 44
Open questionXE-CNAT2 marksNeeds review
A continuous, aligned carbon fibre (CF) reinforced polymer composite with 30 vol% of CF and rest resin was designed for a specific application. The modulus of elasticity of CF is 17 GPa and that of the resin is 3.0 GPa. The modulus of elasticity for this composite in the direction of fibre alignment is ............GPa.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 45
Open questionXE-CMCQ2 marksNeeds review
Match the composites in Column I with the most suitable application in Column II
Column I
(P) Exfoliated silicates filled butyl rubber
(Q) Fiber reinforced aluminium alloy
(R) Silicon carbide whiskers reinforced alumina
(S) Carbon particles reinforced plastic composites
Column II
(1) Automobile pistons
(2) Contact lenses
(3) Ski boards
(4) Tennis balls
(5) Cutting tool inserts for machining
Your answerChoose one option.
Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer