Engineering Sciences
GATE XE format:mcq PYQs
Build your understanding with focused practice from past exam papers.
Questions 241–250 of 959. Imported answers require independent review unless marked reviewed.
Question 101
Open questionXE-EMCQ2 marksNeeds review
A Carnot engine operates between two temperatures T₁ and T₂ such that T₁ > T₂. If the thermal efficiency of the engine is to be increased by changing one of the temperatures by a constant amount ΔT > 0, which one of the following cases will give the highest increase in efficiency?
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 answerQuestion 102
Open questionXE-EMCQ2 marksNeeds review
The equation of state for a non-ideal gas is
where P is pressure, v is specific volume, R is the specific gas constant, T is temperature, and B is a temperature dependent parameter. For this gas, the partial derivative of enthalpy with respect to pressure at constant temperature isYour 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 answerQuestion 110
Open questionXE-FMCQ1 markNeeds review
Phenol-formaldehyde resin is prepared by
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 answerQuestion 111
Open questionXE-FMCQ1 markNeeds review
Melting phenomenon in a semi-crystalline polymer is a ________ order phase transition.
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 answerQuestion 112
Open questionXE-FMCQ1 markNeeds review
A certain polymer synthesised in the laboratory shows that all the chains have same number of repeat units (i.e., same degree of polymerization). The relationship between weight-average (
), number-average (
), and z-average (
) molecular weights for this polymer can be expressed asYour 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 answerQuestion 113
Open questionXE-FMCQ1 markNeeds review
Nitrile rubber is the copolymer of
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 answerQuestion 114
Open questionXE-FMCQ1 markNeeds review
A suitable physical compatibilizer of a binary blend of poly(ethylene) and poly(propylene) is ______.
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 answerQuestion 115
Open questionXE-FMCQ1 markNeeds review
The ‘die swell’ phenomenon exhibited by a polymer melt is due to
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 answerQuestion 116
Open questionXE-FMCQ1 markNeeds review
Thermoforming operation of semi-crystalline polymers with glass transition temperature,
, and melting temperature,
, is carried out at a temperature
, in the range ofYour 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 answerQuestion 117
Open questionXE-FMCQ1 markNeeds review
Feedstock recycling of poly(ethylene terephthalate) is carried out by
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