List of top Agricultural Engineering and Technology Questions on IC Engines asked in ICAR AIEEA (PG)

A spark ignition engine is idling at 500 rpm. If the average flame speed is 10 \(m\cdot s^{-1}\) and the flame front must travel 50 mm from the spark plug to consume 85 % of the fuel-air mixture, how much spark advance is needed if 85 % of the fuel is to be consumed before the crankshaft reaches 10\(^\circ\) after HDC?
An engine has a swept volume of 275 \(\text{cm}^3\), clearance volume of 25 \(\text{cm}^3\). Its volumetric efficiency is 0.80 and mechanical efficiency is 0.90. The volume of mixture taken in per stroke is
Which of the following is true incase of turbocharger?
(A). Turbocharger is driven by exhaust gas turbine
(B). Turbocharging increases the density of air delivered to engine cylinders
(C). A turbo-charged engine operates with low cylinder temperatures
(D). A Turbo-charged engine has increased fuel consumption for the power produced

Choose the correct answer from the options given below:
Given below are two statements:
Statement (I): The piston attains its maximum velocity at top dead centre.
Statement (II): The piston attains its maximum acceleration at top and bottom dead centre.

In light of the above statements, choose the most appropriate answer from the options given below.
In four stroke cycle engines
Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).

Assertion (A): The materials used are frequently different for inlet and exhaust valves.
Reason (R): Inlet valves run cooler than exhaust valves

In light of the above statements, choose the correct answer from the options given below.
Pensky Martens closed tester is used for determination of which of the following property of fuel?
Which of the following is true for self-ignition temperature of CI engine and SI engine fuel?
(A). A good CI engine fuel requires high self-ignition temperature
(B). A good SI engine requires low self-ignition temperature
(C). A good CI engine fuel requires low self-ignition temperature
(D). A good SI engine requires high self-ignition temperature

Choose the correct answer from the options given below:
Reid vapour pressure test is conducted to check
Given below are two statements
Statement I: Weight transfer from drawbar pull, increases the soil reaction against front wheels and decreases the reaction against rear wheel.
Statement II: For towed wheel axle torque is zero and for self propelled wheel pull is zero.
In light of the above statements, choose the most appropriate answer from the options given below
Which of the following corrections are applied to hydrometer readings during sedimentation analysis?
A. Temperature correction
B. Meniscus correction
C. Humidity correction
D. Moisture correction
E. Deflocculating agent correction
Choose the correct answer from the options given below:
Determine the power transmitted by a gear of tractor gear box having size 12 cm, if it is rotating at 1350 RPM and transmitting 17.5 kg-m torque.
A diesel engine has following specifications:
i) Compression ratio (r) = 14:1
ii) Fuel cut off at 0.08 of the stroke
iii) Relative efficiency = 52%
What is the cut off ratio for the engine
Given below are two statements, one is labelled as Assertion (A) and other one labelled as Reason (R).
Assertion (A): The cylinder wall temperature of air-cooled engine is generally higher than that of water cooled engine.
Reason (R): The control of cylinder temperature is more difficult in air cooled engines.
In light of the above statements, choose the most appropriate answer from the options given below:
Given below are two statements:
Statement (I): The type of valve most commonly found in internal combustion engines is the poppet valve.
Statement (II): The common valve arrangement found on tractor engines is overhead.
In light of the above statements, choose the most appropriate answer from the options given below:
In which of the following engines it is possible to remove all of the imbalance by crankshaft counterweights
(A). Single cylinder
(B). Two cylinder
(C). Three cylinder
(D). Four cylinder
(E). Six cylinder
Choose the correct answer from the options given below:
Given below are two statements:
Statement (I): For the same compression ratio and same heat input, Diesel cycle is more efficient than Otto cycle.
Statement (II): The peak pressure in the cylinder of diesel engine are much higher than in a spark ignition engine.
In light of the above statements, choose the most appropriate answer from the options given below:
Mufflers are provided in tractor to control:
Assertion A: Super charged petrol engines employ lower compression ratios.
Reason R: Super charging results in increase in the intake temperature of engine, reduction of ignition delay and thus tendency to detonate or pre-ignite.
In light of the above statements, choose the most appropriate answer from the options given below:
The lowest temperature at which fuel ceases to flow is known as:
Find the clearance volume of an engine whose displacement volume is 1500 cm\(^3\) and compression ratio is 8:2.
Assertion A: Super charged petrol engines employ lower compression ratios.
Reason R: Super charging results in increase in the intake temperature of engine, reduction of ignition delay and thus tendency to detonate or pre-ignite.
In light of the above statements, choose the most appropriate answer from the options given below:
Mufflers are provided in tractor to control:
The lowest temperature at which fuel ceases to flow is known as:
Find the clearance volume of an engine whose displacement volume is 1500 cm\(^3\) and compression ratio is 8:2.