RSMSSB Junior Instructor Mechanic Diesel Engine 2018-19 Paper

RSMSSB Junior Instructor Mechanic Diesel Engine Paper
Date of Exam – 23rd Dec 2019
No. of questions – 150 Duration – 03 hours
Diesel Engine Mechanic – 100 questions
General Knowledge – 50 questions

What is sucked in cylinder in 4-stroke diesel engine during suction storke?
(a) Air-Fuel Mixture
(b) Air Only
(c) Fuel Only
(d) None of these

Enigne Bearing Material Babbit is an alloy of
(a) Tin, Copper, Lead, Antimony
(b) Tin, Copper, Zinc
(c) Cadmium, Copper, Nickel
(d) Tin, Copper, Lead, Phosphorus

In a four stroke cycle engine camshaft revolves at which speed of crank?
(a) two times
(b) half
(c) four times
(d) three times

The weight of flywheel depends upon
(a) length of engine
(b) height of engine
(c) weight of engine
(d) No. of cylinders in engine

The angle of prick punch is
(a) 30 degree
(b) 90 degree
(c) 75 degree
(d) 120 degree

Which marking media is used for marking on machines surfaces?
(a) Chalk
(b) Pursian Blue
(c) Copper sulphate solution
(d) None of these

Lubricating oil
(a) minimizes wear in moving parts
(b) helps in keeping the parts cool
(c) washes away and carries away dirt
(d) All of these

The following is/are the advantage(s) of water cooling over air cooling system
(a) mechanical noise is reduced
(b) temperature of engine parts is more uniform
(c) both (a) and (b)
(d) None of these

Dip-stick is used for measurement of oil level in
(a) Crank case
(b) Gear Box
(c) Piston rings
(d) Bearings

Grease is used in
(a) Wheel Bearings
(b) Piston
(c) Gear Box
(d) Valve

In Diesel Engine, Direct Fuel injection is done at
(a) Low Temperature
(b) High Pressure
(c) Low Pressure
(d) High Temperature

The reason of Engine overheating is
(a) Leak in the cooling system
(b) Faculty charging system
(c) Faculty solenoid
(d) Low Injector pressure

The turbocharger uses
(a) engine energy
(b) energy of exhaust gases
(c) steam energy
(d) water energy from radiator

Supercharging is essential in
(a) diesel engine
(b) petrol engine
(c) gas turbines
(d) aircraft engines

The compression ratio in a petrol engine is generally in between
(a) 7 to 10
(b) 10 to 14
(c) 14 to 18
(d) 18 to 22