Bihar SBTE Diploma Mechanical 6th SEM May 2019 Paper on Vehicle Maintenance
| Sr. No. | Questions with options |
| 1 | The valves have to be replaced if the metal to be remove for smoothening their end surface is more than
(a) 0.05 mm (b) 0.5 mm (c) 1.5 mm (d) 5 mm |
| 2 | Maximum permissible ovality in a cylinder is usually
(a) 0.01 mm (b) 0.1 mm (c) 0.5 mm (d) 1.00 mm |
| 3 | For checking the alignment of the crank shaft. The best method is to place it ______
(a) On V-blocks (b) On its ends (c) On lathe centres (d) On a plane smooth table |
| 4 | The friction that occurs between the layers of oil in an oil firm is called
(a) Viscous friction (b) Solid friction (c) Boundary friction (d) Greasy friction |
| 5 | Painting of automobile is done to
(a) Prevent rust from growing on the body (b) Improve its external appearance (c) Retain the characteristics of steel for long (d) All of the above |
| 6 | The brake warning light warns the driver of
(a) Water in the master cylinder (b) Air in the hydraulic system (c) Failure of the primary or the secondary circuit of hydraulic system (d) Power brake failure |
| 7 | The condition that results in large quantities of H.C emission is
(a) High temperature combustion (b) Incomplete combustion (c) Low temperature combustion (d) High atmospheric temperature combustion |
| 8 | When the battery is half (50%) charged, the electrolyte of specific gravity of a battery is usually
(a) 0.74 (b) 1.00 (c) 1.12 (d) 1.19 |
| 9 | The engine oil level should be checked
(a) Immediately after the ignition switch is turned off (b) While the engine is running (c) A few minutes after the ignition switch is turned off (d) While the engine is running at high idle speed |
| 10 | If the spark plug deposit indicates black coating of soot, it indicates that the engine has been generally operating on
(a) Tool in mixture e (b) Stoichiometric mixture (c) Most economical mixture (d) Too rich mixture |
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| 11 | The reconditioning process used to give cylinder bore surface across hatch pattern is known as
(a) Honing (b) Porous plating (c) Boring (d) Shot peening |
| 12 | Vulcanizing means
(a) Heating rubber under pressure (b) Spraying with special paint (c) Melting rubber while stirring it (d) None of the above |
| 13 | The condition that causes vapour locking in a brake system is
(a) Over heating of the fluid due to frequent brake application (b) Over cooling of the brake during high speed driving (c) Keeping the vehicle without use for an extended period (d) An excessively high engine speed on down hill road |
| 14 | The adjustment for backlash in a differential is provided between
(a) Crown wheel and the sun gear (b) Sun gear and the plant gear (c) Crown wheel and the drive pinion (d) Crown wheel and the planet geat |
| 15 | The purpose of tyre rotation on automobile is to
(a) Avoid ply separation (b) Equalize wear (c) Get better ride (d) None of the above |
| 16 | The maximum disc run out allowed on the vehicle is generally
(a) 1 mm (b) 0.5 mm (c) 0.1 mm (d) 0.01 mm |
| 17 | In modern vehicles, the headlight dimming switch is mounted on the
(a) Steering column (b) Dash board (c) Floor board (d) Side pannel |
| 18 | When the choke is applied the fuel comes out from the
(a) Main jet (b) Idle port (c) Transfer port (d) Progression hole |
| 19 | The clutch slippage while clutch is engaged is particularly noticeable
(a) During idling (b) During acceleration (c) During braking (d) None of the above |
| 20 | The probable cause for un even wear of tyres for heavy vehicles could be
(a) Excessive camber (b) Incorrect castor (c) Over loading on vehicle (d) All of the above |
| Data Collected By – Rashmi | |
| Published On – 21st May 2022 | |
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