Kerala PSC Previous Years Question Paper & Answer
Page:10
Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Junior Instructor Mechanical Agricultural Machinery (SR for ST only)' And exam conducted in the year 2023. And Question paper code was '154/2023/OL'. Medium of question paper was in Malayalam or English . Booklet Alphacode was ''. Answer keys are given at the bottom, but we suggest you to try answering the questions yourself and compare the key along wih to check your performance. Because we would like you to do and practice by yourself.
Correct Answer:- Option-B
Question51:-Pre-ignition is caused by the burning of the fuel in the combustion
chamber before the piston has reached the top dead centre, and is due to
A:-Overheated spark plug points
B:-Red hot carbon deposits on cylinder walls
C:-Cylinder walls being too hot
D:-Any of the mentioned above
Correct Answer:- Option-D
Question52:-Theoretically correct air fuel mixture in a spark ignition engine
A:-10:1
B:-15:1
C:-20:1
D:-25:1
Correct Answer:- Option-B
Question53:-The process of breaking up of a liquid into fine droplets by spraying is
called
A:-Vaporisation
B:-Carburetion
C:-Atomization
D:-lonization
Correct Answer:- Option-C
Question54:-Which engine can be operated both in clock-wise and counter clock-
wise direction?
A:-Two stroke engine
B:-Four stoke engine
C:-Both two stroke and four stroke engine
D:-None of the above
Correct Answer:- Option-A
Question55:-The ignition quality of diesel fuel is indicated by
A:-Octane number
B:-Calorific value
C:-Cetane number
D:-None of these
Correct Answer:- Option-C
Question56:-The function of the compression ring is that it
A:-Increases the combustion temperature
B:-Creates swirling