IC Engine – Mechanical Engineering Questions Answers on Internal Combustion Engine
Internal Combustion Engines (ICE) have been the backbone of modern transportation and power generation for over a century. Understanding the principles and mechanics behind these engines is crucial for anyone involved in automotive, mechanical, or energy engineering. To help you solidify your knowledge, this article presents a collection of multiple-choice questions (MCQs) along with their detailed answers, covering various aspects of internal combustion engines.
1) The top of the piston in two-stroke engine is
a) flat
b) slanted
c) crown shaped
d) convex shaped
2) The combustion in compression ignition engine is
a) homogeneous
b) heterogeneous
c) laminar
d) none of the mentioned
3)The minimum number of rings in a piston are
a) cast iron
b) bronze
c) aluminium
d) White metal
4)If the temperature of intake air in I.C. engine is lowered, then its efficiency will
a) increase
b) decrease
c) remain same
d) increase up to certain limit and then decrease
5)Recardo’s theory is associated with
a) IC engines
b) Wankel engines
c) Steam turbines
d) None of these
6)The fuel in diesel engine is normally injected at pressure of
a) 5-10 kg/cm2
b) 20-25 kg/cm2
c) 60-80 kg/cm2
d) 90-130 kg/cm2
7) Compression ratio in case of CI engine is in the range of
a) 6-10
b) 16-20
c) 20-35
d) None of these
8)Which one of the following is Not a necessary assumption for the air standard Otto-cycle?
a) All processes are both internally as well as externally reversible
b) Intake and exhaust processes are constant volume heat rejection processes
c) The combustion process is a constant volume heat addition process
d) The working fluid is an ideal gas with constant specific heats
9)Lenoir cycle is used in
a) SI engines
b) CI engines
c) pulse jet engines
d) gas turbines
10)If the intake air temperature of I.C. engine increases, its efficiency will
(a) increase
(b) decrease
(c) remain same
(d) unpredictable
(e) depend on other factors.