ITI NCVT Diesel Mechanic Question paper 1st Year
ITI NCVT Diesel Mechanic: However, I can suggest some topics and areas that you may want to focus on when preparing for your exam:
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- Diesel engine components and their functions: This includes the different parts of a diesel engine, such as cylinders, pistons, crankshafts, and camshafts, and what they do.
- Engine lubrication system: Knowledge of engine oil types, lubrication system components such as oil pumps, filters, and coolers.
- Fuel injection system: Types of fuel injection system, components such as fuel pump, injectors, and governor.
- Engine cooling system: The working principle of the engine cooling system, components such as the radiator, water pump, and thermostat.
- Electrical system: Types of batteries, starter motor, and alternator. Basic electrical circuits and how they work.
- Safety precautions: Proper handling of tools and equipment, safe working practices, and emergency procedures.
Part – 1
ITI NCVT Diesel Mechanic Question paper
1- What is the compression ratio of a typical diesel engine?
a) 10:1
b) 20:1
c) 30:1
d) 40:1
Answer: b) 20:1
2- What type of fuel is used in a diesel engine?
a) Gasoline
b) Propane
c) Diesel
d) Natural Gas
Answer: c) Diesel
4- What is the function of the diesel engine’s fuel injection system?
a) To compress the air and fuel mixture
b) To ignite the fuel
c) To cool the engine
d) To lubricate the engine
Answer: b) To ignite the fuel
5- What is the purpose of the air filter in a diesel engine?
a) To regulate the amount of air entering the engine
b) To cool the engine
c) To filter out contaminants in the air before it enters the engine
d) To increase fuel efficiency
Answer: c) To filter out contaminants in the air before it enters the engine
6- Which of the following is a common type of fuel injection system used in diesel engines?
a) Carburetor injection
b) Throttle body injection
c) Direct injection
d) Multi-port injection
Answer: c) Direct injection
7- What is the function of the turbocharger in a diesel engine?
a) To regulate the amount of fuel entering the engine
b) To increase the engine’s power output
c) To cool the engine
d) To filter out contaminants in the air before it enters the engine
Answer: b) To increase the engine’s power output
8- What is the purpose of the engine oil in a diesel engine?
a) To ignite the fuel
b) To cool the engine
c) To lubricate the engine’s moving parts
d) To filter out contaminants in the air before it enters the engine
Answer: c) To lubricate the engine’s moving parts
9- What is the function of the crankshaft in a diesel engine?
a) To compress the air and fuel mixture
b) To ignite the fuel
c) To convert linear motion into rotational motion
d) To lubricate the engine’s moving parts
Answer: c) To convert linear motion into rotational motion
10- What is the purpose of the camshaft in a diesel engine?
a) To compress the air and fuel mixture
b) To ignite the fuel
c) To convert linear motion into rotational motion
d) To operate the engine’s valves
Answer: d) To operate the engine’s valves
11- What is the function of the timing belt or chain in a diesel engine?
a) To compress the air and fuel mixture
b) To ignite the fuel
c) To convert linear motion into rotational motion
d) To synchronize the operation of the engine’s valves and pistons
Answer: d) To synchronize the operation of the engine’s valves and pistons
12- What is the function of the glow plug in a diesel engine?
a) To compress the air and fuel mixture
b) To ignite the fuel
c) To regulate the amount of air entering the engine
d) To increase fuel efficiency
Answer: b) To ignite the fuel
13- What is the purpose of the water pump in a diesel engine?
a) To regulate the amount of air entering the engine
b) To cool the engine
c) To lubricate the engine’s moving parts
d) To increase fuel efficiency
Answer: b) To cool the engine
14- What is the purpose of the thermostat in a diesel engine
a) To regulate the amount of fuel entering the engine
b) To cool the engine
c) To control the flow of coolant to maintain optimal operating temperature
d) To increase fuel efficiency
Answer: c) To control the flow of coolant to maintain optimal operating temperature
15- What is the function of the EGR valve in a diesel engine?
a) To regulate the amount of fuel entering the engine
b) To cool the engine
c) To recirculate exhaust gas back into the engine to reduce emissions
d) To increase fuel efficiency
Answer: c) To recirculate exhaust gas back into the engine to reduce emissions
16- What is the purpose of the DPF (Diesel Particulate Filter) in a diesel engine?
a) To regulate the amount of fuel entering the engine
b) To cool the engine
c) To filter out particulate matter from the exhaust to reduce emissions
d) To increase fuel efficiency
Answer: c) To filter out particulate matter from the exhaust to reduce emissions
17- What is the purpose of the SCR (Selective Catalytic Reduction) system in a diesel engine?
a) To regulate the amount of fuel entering the engine
b) To cool the engine
c) To reduce emissions by converting NOx into harmless nitrogen and water
d) To increase fuel efficiency
Answer: c) To reduce emissions by converting NOx into harmless nitrogen and water
18- Which of the following is not a common type of diesel engine layout?
a) Inline
b) V-shaped
c) Flat
d) Wankel
Answer: d) Wankel
19- What is the function of the intake manifold in a diesel engine?
a) To regulate the amount of fuel entering the engine
b) To cool the engine
c) To distribute air to the engine’s cylinders
d) To increase fuel efficiency
Answer: c) To distribute air to the engine’s cylinders
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20- What is the purpose of the exhaust manifold in a diesel engine?
a) To regulate the amount of fuel entering the engine
b) To cool the engine
c) To collect exhaust gas from the engine’s cylinders
d) To increase fuel efficiency
Answer: c) To collect exhaust gas from the engine’s cylinders
21- What is the function of the fuel filter in a diesel engine?
a) To regulate the amount of fuel entering the engine
b) To cool the engine
c) To filter out contaminants from the fuel before it enters the engine
d) To increase fuel efficiency
Answer: c) To filter out contaminants from the fuel before it enters the engine
22- What is the purpose of the oil filter in a diesel engine?
a) To ignite the fuel
b) To cool the engine
c) To filter out contaminants from the engine oil
d) To increase fuel efficiency
Answer: c) To filter out contaminants from the engine oil
23- What is the function of the intercooler in a turbocharged diesel engine?
a) To regulate the amount of fuel entering the engine
b) To cool the engine
c) To cool the compressed air from the turbocharger before it enters the engine’s cylinders
d) To increase fuel efficiency
Answer: c) To cool the compressed air from the turbocharger before it enters the engine’s cylinders
24- What is the purpose of the radiator in a diesel engine?
a) To regulate the amount of fuel entering the engine
b) To cool the engine
c) To lubricate the engine’s moving parts
d) To increase fuel efficiency
Answer: b) To cool the engine
25- What is the function of the fuel pump in a diesel engine?
a) To compress the air and fuel
b) To ignite the fuel
c) To deliver fuel to the engine’s cylinders at the proper pressure and volume
d) To increase fuel efficiency
Answer: c) To deliver fuel to the engine’s cylinders at the proper pressure and volume