Mechanical engineering model paper 37 questions and answers.

01.The point that connects the saturated liquid line to the saturated vapour line is called

critical point.

02.The heating of a gas at constant pressure is governed by

Charles' law.

03.If in the equation pvn = C. the value of n = ∝ , then the process is called

constant volume process.

04.When there is leakage of ammonia refrigerant, the sulphur stick gives

white smoke.

05.The most preferred type of carburettor is

concentric.

06.The phenomenon of pre-ignition

never occurs in diesel engines.

07.The primary fuel used in nuclear power plants is

U235.

08.Hard coke is used in

blast furnace.

09.The basic purpose of boiler drum is to

separate steam from water.

10.The mass number of a substance represents the sum of total number of

protons and neutrons in a nucleus.

11.The must commonly used moderator in nuclear power plant is

heavy water.

12.The number of water level indicators in a boiler are generally

two in number.

13.Surface tension is due to

cohesion.

14.The hydraulic jump results when

the bed slope changes from steep to mild.

15.The equation of motion for a viscous fluid known as

Navier stoke equation.

16.Young's modulus is defined as the ratio of

longitudinal stress and longitudinal strain.

17.Creep is the gradual increase of

plastic strain with time at constant load.

18.The ratio of linear stress to the linear strain is called

modulus of elasticity.

19.The point of contra flexure is a point where

bending moment changes sign.

20.The law of motion involved in the recoil of gun is

Newton's third law of motion.

21.Resistance to fatigue of a material is measured by

Endurance limit.

22.The bending stress in a curved beam is

zero at the point other than centroidal axis.

23.A pressure vessel is said to be a thick shell, if the ratio of wall thickness to its diameter is

greater than 1/ 10.

24.The locus of instantaneous center of a moving body relative to a fixed body is known as the

space centrode.

25.The amount of energy absorbed by a flywheel is determined form the

torque-crank angle diagram.

26.The condition of isochronisms can be realized in a

Hartnell governor.

27.A point on a connecting link (excluding end points) of a double slider crank mechanismtrances a

elliptical path.

28.An exact straight line motion mechanism is a

Scott-Russell's mechanism,

Hart's mechanism,

Peaucellier's mechanism,

all of these.

29.The cam follower generally used in automobile engines is

spherical faced follower.

30.Oxyacetylene flame cuts metal by its

Intensive oxidation.

31.Spot welding is used for welding

lap joints in plates having 0.025 mm to 1.245 mm thickness.

32.Neutral flame is use to weld

steel,

cast iron,

copper,

all of these.

33.An oxidising process used for aluminium and magnesium articles is called

anodising.

34.Drilling is an example of

oblique cutting.

35.A twist drill is an

end cutting tool.

36The operation performed on a shaper is

machining horizontal surface,

machining vertical surface,

machining angular surface.

37.The hardness of a grinding wheels is specified by

letter of alphabet

Just like The soft grade grinding wheels are denoted by the letters

A to H.