Air-petrol ratio in an automotive petrol engine is around ________________?
(A) 14 : 1
(B) 22 : 1
(C) 25 : 1
(D) 4 : 1
____________ is the process used for setting up compressive stresses in the surface of a metal to improve its fatigue strength ?
(A) Lancing
(B) Shot peening
(C) Slugging
(D) Spinning
Which of the following has the highest modulus of elasticity (about 7 × 106 kg/cm2) ?
(A) High speed steel
(B) Stainless steel
(C) Tungsten carbide
(D) Superalloys
Pick out the wrong conversion of absolute & kinematic viscosities ?
(A) 1 stoke = 1 cm2/sec
(B) 1 N.sec/m2 = 10 paise
(C) 1 stoke = 1 m2/sec
(D) 1 m2/sec = 104 stokes
The stress at which extension of the material takes place more rapidly as compared to the increase in load is termed as the _____________ point of the material?
(A) Elastic
(B) Ultimate
(C) Yielding
(D) Breaking
An approximately _____________ process exemplifies the flow of a gas through a very long pipe of uniform cross-section ?
(A) Adiabatic
(B) Isothermal
(C) Isentropic
(D) Isochoric
Which of the following are made out of the carbon steel having carbon content of 0.9 to 1%?
(A) Small punches, broaches reamers and springs
(B) Cutlery, screws, rivets and files
(C) Mandrels, twist drills, small lathe tools and razors
(D) Forgings like can shaft, structural steel plate, threading dies and drawing dies
Nickel is a _________________ material?
(A) Ferromagnetic
(B) Semi-conductor
(C) Paramagnetic
(D) Ferroelectric
The property of material, by which a given amount of energy is absorbed by it without plastic deformation, is called the________________________?
(A) Resilience
(B) Toughness
(C) Ductility
(D) Impact strength
Function of fusible plug in a boiler is to ______________________?
(A) Drain out water and sludge from the boiler during repair
(B) Put off fire in the furnace when water level in the boiler falls to unsafe limit
(C) Guard the boiler in case of abnormal rise in steam pressure
(D) All A,