MCQ
Kavach MCQ - Practice Questions with Answers
Solve 71 Kavach questions for RAS/RPSC preparation.
Practice questions
Q1Consider the following statements about Kavach data, authentication and failure handling: 1. Stationary and onboard Kavach units verify the CBC-MAC code for every message before processing. 2. In case both GPS/GNSS and the real-time clock fail, the Onboard Kavach unit stops radio communication and switches to System Failure mode. 3. The onboard vital computer has real-time clock synchronization facility with GNSS clock. 4. If both GPS/GNSS and real-time clock fail, the Onboard Kavach unit continues normal radio communication without reporting to the Network Monitoring System. Which of the statements given above are correct?
Statements 1, 2 and 3 are correct. Statement 4 is false: the specification requires stopping radio communication, switching to System Failure mode and sending a message to NMS through GSM/LTE.
Q2Consider the following statements about Kavach: 1. Kavach is an indigenously developed Automatic Train Protection system. 2. Kavach requires safety certification of the highest order, SIL-4. 3. Kavach is an imported European train-protection system deployed unchanged in India. Which of the statements given above are correct?
Statements 1 and 2 are correct: Kavach is an indigenously developed Automatic Train Protection system that requires SIL-4 certification. Statement 3 is false because Kavach is indigenous, not an imported European system.
Q3Consider the following statements about Kavach: 1. Kavach has been developed indigenously by RDSO in association with three Indian vendors. 2. Kavach has been adopted as India's National Automatic Train Protection system. 3. Kavach is designed as a manual-only advisory system without automatic braking. Which of the statements given above are correct?
Statements 1 and 2 are correct: PIB says Kavach was developed by RDSO with three Indian vendors and adopted as the National ATP system. Statement 3 is incorrect because PIB lists automatic brake application as a Kavach feature.
Q4Consider the following statements about the onboard Kavach subsystem: 1. The onboard subsystem includes an Onboard Kavach Vital Computer. 2. It includes two RFID readers consisting of RFID reader antenna in hot standby. 3. The onboard radio unit consists of two radio modems in hot standby with separate cables and antennae for each radio, or LTE unit as prescribed. 4. The onboard subsystem is specified with only one Driver Machine Interface for each locomotive. Which of the statements given above are correct?
Statements 1, 2 and 3 match the RDSO onboard-subsystem list. Statement 4 is false because the specification lists two DMI units for each locomotive, while one DMI applies to each driving motor coach of EMU/DMU/MEMU/DEMU/trainset.
Q5Consider the following statements about Kavach: 1. Kavach has been certified for the highest level of Safety Integrity Level, SIL-4, by an Independent Safety Assessor. 2. PIB states that Kavach reduces the probability of train collisions in block sections and on running lines at stations through non-SIL features. 3. Kavach is certified only up to Safety Integrity Level 2. Which of the statements given above are correct?
Statements 1 and 2 are correct: PIB says Kavach is SIL-4 certified by an Independent Safety Assessor and reduces collision probability through non-SIL features. Statement 3 is incorrect because the cited level is SIL-4, not SIL-2.
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6Consider the following statements about Kavach communication and interfaces: 1. The RDSO specification includes Kavach UHF radio modem requirements for 406 to 470 MHz. 2. The RDSO specification includes Kavach LTE interface requirements for system operation. 3. Onboard Kavach has two commercial GSM/LTE interfaces for connectivity with the centralized Network Monitoring System and Key Management System. 4. The RDSO specification prohibits Kavach from using GSM/LTE connectivity for the centralized Network Monitoring System. Which of the statements given above are correct?
7Consider the following statements about speed and direction determination in Kavach: 1. For speed sensing, directional type pulse generators with high reliability are specified. 2. Each pulse generator must have at least two independent speed-output channels. 3. Two pulse generators are to be fitted on the same axle only. 4. On start-up or restart, onboard Kavach assumes movement direction as undefined until it is derived. Which of the statements given above are correct?
8Consider the following statements about stationary Kavach and interlocking: 1. A stationary Kavach unit shall be capable of taking potential-free inputs from interlocking through a double-cutting arrangement. 2. A stationary Kavach unit shall be capable of taking a minimum of 256 inputs. 3. The capacity of Stationary Kavach is restricted to 70 percent of its design capacity in terms of inputs, routes and trains, whichever is lower. 4. The movement authority is held by stationary Kavach for 20 to 50 seconds in case of signal flickering. Which of the statements given above are correct?
9Consider the following statements about collision scenarios handled by Kavach: 1. In a head-on collision situation, if both locomotives are Kavach-equipped, automatic braking is applied on both locomotives. 2. In a rear-end collision situation, only the rear train applies automatic brakes. 3. In station sections, head-on and rear-end collision prevention is decided by the station master rather than by Kavach logic. 4. In Kavach, a network monitoring system is listed as a part of the overall system. Which of the statements given above are correct?
10Which indigenous train-protection system is fitted in the MCF Raebareli Vande Bharat trainset?
11Consider the following statements about Kavach communication and supervision: 1. Kavach locomotives periodically transmit location information every 2 seconds to the station Kavach units and nearby Kavach locomotives. 2. Kavach can supervise a movement authority that has been received from station Kavach and acknowledged by the onboard Kavach. 3. If no acknowledgement is received from a called station for 15 seconds, the onboard unit may initiate brake application and warn the driver. 4. Radio communication failure is assessed only after 15 minutes of non-communication. Which of the statements given above are correct?
12Consider the following statements about Kavach safety features: 1. Compliance with temporary speed restrictions is listed as fully finalised and not under trial. 2. Kavach is designed only for head-on collisions and not for rear-end or side-on collisions. 3. Horn activation near level crossing gates under Kavach is only a manual function of the crew. Which of the statements given above are correct?
13Consider the following statements about the phased implementation of Kavach: 1. Implementation requires all rolling stock, wayside stations and track to be equipped with Kavach. 2. Kavach is being implemented on Indian Railways in a phased manner. 3. The 2022 PIB reply stated that Kavach has no export potential in future. Which of the statements given above are correct?
14Consider the following statements about the working of Kavach: 1. The wayside system calculates Movement Authority using train position, speed and track profile and transmits it to the onboard Kavach unit. 2. The onboard unit, not the wayside system, calculates Movement Authority and transmits it to the trackside unit. 3. The onboard system monitors train speed, displays critical information and generates braking curves. Which of the statements given above are correct?
15Consider the following statements about validation during the Prayagraj-Kanpur Kavach trials: 1. More than 20,000 kilometres of passenger trial runs were completed. 2. All system validations were found satisfactory. 3. The same PIB release reported that all system validations had failed. Which of the statements given above are correct?