Frequently Asked Questions (FAQ)

After receiving a letter informing to take the vehicle to the DMT werahara, you should bring your vehicle for the inspection on the given date or near Monday after rectification if the vehicle has excessive tail pipe emission. Vehicle that doesn’t respond to any of the warning letters are blacklisted and the VET certificate and the revenue license for the respective year cannot be obtained until the vehicle proceed for the testing after rectification. Additionally, the aforementioned vehicle is also blacklisted from DMT vehicle registration system making it impossible to perform any services related to it.

You should bring your vehicle for the inspection on the given date or on Mondays after rectification if the vehicle has excessive tail pipe emission. After the inspection of the vehicle by the VET officers, if the vehicle is passed the test , it will be whitelisted form our system.

Vehicle emission testing is carried out to ensure that vehicle running on roads emit emissions within permissible limits. Therefore, to achieve expected outcome of VET program by minimizing adverse effects guaranteeing public well-being, Vehicles on roads must strictly adhere to the prevailing limits stipulated under environmental regulations. In this line, vehicle users are required to keep the vehicle maintenance to the recommended condition throughout the year. After the tests, users are expected to maintain vehicles properly. However, according to our roadside inspections, even vehicles especially buses and long vehicles which have passed emission test are found running smoky on roads because of lack of subsequent due maintenance by users. Therefore, VET office of the DMT will do random checking of vehicles in order to identify the vehicles with lack of maintenance.

The Department of Motor Traffic has mandated that the certificate of vehicle emission testing be submitted while renewing the annual license of your vehicle. Hence, it must at least be done once a year before renewing the vehicle license. Apart from that, whenever visible smoke comes out of the tailpipe, it is better to get the testing done and repair the malfunctioning engine at a repair center.

The owners are advised to bring the original vehicle registration document or if the vehicle is under a leasing it is compulsory to bring the certified copy of the vehicle registration document from the relevant leasing/finance company. Registration certificate of the vehicle should be produced. Engine number and chassis number must be cleaned for easy reading. As the engine of the vehicle needs to be at the running temperature when produced for the test, the Engine must be switched on at least for 10 minutes. Vehicles with oil or emission gas leaks are not subjected to the test. The vehicle should be free of water leaks with the engine in good working condition. In case of any damage caused during testing to a vehicle subjected to the test without confirming to the said requirements, the loss should be borne by the owner.

As soon as the vehicle enters the testing center, they are directed to the specific lanes on the basis of their fuel types. At each lane, the vehicles are visually inspected first. During visual inspection, Following criteria are noted: • Chassis number • Engine number • Silencer leak • Oil Leak • Water Leakages • Air Filter (if Possible) • Fuel tank cap • Engine oil dip stick • Plug Top • Fan belt • Abnormal vibration and noises • Operation of governor (accelerator) If any defects of the observation are noticed, the vehicle won’t be subjected to emission testing. The owner will be advised to rectify any defects and come for testing again. A specific “Visual Inspection” form is used for this purpose. Hence, this visual inspection procedure guarantees that your vehicle will not be damaged during the testing.

After the visual inspection, the diesel vehicles in their respective lane are tested. The oil temperature is set around 55 °C. The diesel vehicles undergo smoke opacity test (Snap Acceleration), with 3 pre snap acceleration test cycles and 3 measurement snap acceleration test cycles. In case of petrol vehicles, they undergo gas analyzer test in the set temperature and RPM (2500+/-300) and CO and HC are monitored under Idle and 2500 RPM speed. During testing, the automated software is used and the technicians only have to insert the testing probe. There is an inbuilt camera which automatically takes picture of vehicle number plate during the testing. The passed and failed vehicles both are then issued their results with their emission values on the approved and color-coded pre-printed VET Certificates. The half-slip of the certificate is submitted to the local authorities. All the vehicles have to pay designated charge for the testing. Upon failure, the testing centers will specific handouts for retests explaining the reason behind test failure. The service center provides free retest for the failed vehicles and is asked to visit after proper maintenance within a period of 60 days.

Not necessarily but the original documents are mandatory.

Not necessarily. The owner can use as per their convenience and priority. All the data will be duly stored in the government data system, so it does not matter. The vehicle owners are encouraged to choose the vehicle centers are company on the basis of their convenience and experience.

Upon failure, the testing centers will provide specific handouts for vehicle owners explaining the reasons for test failure. The service center provides free retest for the failed vehicles and is asked to visit after proper maintenance within a period of 60 days.

The vehicle owners can choose the repair centers on their own and are encouraged to choose any good, quality repair centers.

Petrol Vehicles

S.No	Type of vehicles	Carbon Monoxide CO (% v/v)	Hydrocarbon HC (ppm v/v)	Other matters
1	Petrol Vehicles other than motor bi-cycles and motor tri-cycles	3.0	1000	Both Idling and 2500 RPM with no load
2	Petrol motor vehicles and petrol motor tri-cycles	4.0	6000	Both Idling and 2500 RPM with no load

Abbreviations- % v/v - percentage as per volume ppm v/v - parts per million as per volume RPM - Rounds per minutes.

Diesel Vehicles

Type Of Vehicle	Smoke Opacity at Instant acceleration K factor (m-1)
Diesel vehicles	4.0

Abbreviations- K – factor - absorbent Co-efficient Instant acceleration - Carries the same meaning in the interpretation of the term ‘SAE RECOMMENDED PRACTICE J 1667

Not Necessarily. The testing can be done in any convenient, authorized testing center belonging to any of the two companies.

You can send a complains to VET project office via hotline numbers (0113100152, 0703500525)