All India Mechanical Engineering Group

The maximum efficiency of worm and worm wheel system is

In limits and fits system, basic shaft system is one whose

 A shaft has a dimension,   The respective values of fundamental deviation and tolerance are

For the following hole and shaft sizes of mated parts according to basic hole system
Hole: 37.50 mm
37.52 mm
Shaft: 37.47 mm
37.45 mm
What is the value of allowance?

Expressing a dimension as 25.3^±0.05 mm is the case of

For grade IT7, value of tolerance is equal to

For a Watt governor, the speed range is

An ideal Refrigeration cycle has condenser and evaporator temperature of 27º C and – 3ºC. The COP of the Refrigerator is

Match the List-I (Unconventional machining method) with List-ll (Medium used):

Match the List-I (Unconventional machining method) with List-II (Medium used):

On a P-V-T surface, the triple point and critical point are seen as respectively

In peritectoid reaction on cooling, we get one solid phase from

In small lot production for machining T-slots on machine tables, it is expected to use

[ME 1990]

If a beam of constant section is subjected throughout its length to a uniform bending moment, it will bend to

Directional solidification can be achieved by providing   

The section modulus of a circular section about an axis through its c.g. is

Fluid statics deals with

The load cup of a screw jack is made separate from the head of the spindle to

A four-bar chain has

In a shaping operation, the average cutting speed Is (stroke length S, number of strokes per minute N, quick return ration R)

​Entropy may be expressed as a function of

In a vapour compression plant, if certain temperature differences are to be maintained in the evaporator and condenser in order to obtain the necessary heat transfer, then the evaporator saturation temperature must be:

The value of an extensive property is extensively dependent on

The following four figures have been drawn to represent a fictitious thermodynamic cycle, on thep-v and T-s planes.

According to the first law of thermodynamics, equal areas are enclosed by

[2005]

If the number of arrival in a queue follows the poisson distribution, then the inter-arrival time obeys which one of the following distribution?

Inclination angle of a turning tool is measured on its

 Fabrication weldability test is used to determine     

 Which one of the following gear manufacturing processes is not based on generation principle?

What does 36 denote in the following marking of the grinding wheel?

5 1 A 36 L 5 V 2 3

A hole is being drilled in a block of magnesium alloy with a 15 mm drill at a feed of 0.1 mm/rev. The spindle is running at 500 rpm. What is the MW? (in mm³/min)?

   A system comprising a single phase is called a

The forces which do not meet at one point and their lines of action do not lie on the same plane are known as

What is the temperature rise after 5 minutes in the below volume?

A device which is used to drain off water from steam pipes without escape of steam is called

Sun's surface at 5800 K emits radiation at a wave-length of 0.5 μm. Afurnace at 300°C will emit through a small opening, radiation at awavelength of nearlyb 

The shape factor of a hemispherical body placed on a flat surface withrespect to itself is: 

Which of the following thermal power plants will have the highest overall thermal efficiency?

Rupture stress is

A thermodynamic cycle is composed of four processes. The heat added, and the work done

in each process are as follows:

The thermal efficiency of the cycle is

Stoichiometric quantity of air is the

The vapour pressure over the concave surface is

A safety valve usually employed with stationary boilers is

The velocity of electrons in electron beam machining is

Pascal’s law states that pressure at a point is equal in all directions

The range of projectile(R) on an upward inclined plane is

Two involute gears of 20° pressure angle are in mesh. The number of teeth on pinion is 20 and gear ratio is 2. If the module is 5 mm and pitch line speed is 1.2 m/s, (Assume addendum as standard and equal to one module). Then angle turned through the pinion when one pair of teeth is in mesh, will be

The point of contra-flexure occurs only in

The minimum number of teeth on the pinion to operate without interference in standard full height involute teeth gear mechanism with 20° pressure angle is

For a given fractional change of speed, if the displacement of the sleeve is high, then the governor is said to be

The speed of an engine varies from 210 rad/s to 190 rad/s. During the cycle the change in kinetic energy is found to be 400 Nm. The inertia of the flywheel in kg/m2 is

The following torsional terms is analogous to bending terms except

Consider the following stress-strain diagram and match the following:
List - I

List - II
1. Hard rubber
2. Soft rubber
3. Structural steel
4. Aluminium alloy

Choose the correct statement among the following:

In a parallel flow heat exchanger operating under steady state, theheat capacity rates (product of specific heat at constant pressure and mass flow rate) of the hot and cold fluid are equal. The hot fluid,flowing at 1 kg/s with Cp = 4 kJ/kgK, enters the heat exchanger at 102°Cwhile the cold fluid has an inlet temperature of 15°C. The overall heat transfer coefficient for the heat exchanger is estimated to be 1 kW/m²K and the corresponding heat transfer surface area is 5 m². Neglect heat transfer between the heat exchanger and the ambient. The heat exchanger is characterized by the following relation: 2ε = 1 – exp(–2NTU).  The exit temperature (in °C) for - the cold fluid is:

Diameter of a gear is 10cm and no of laths is 25.The module of the gear is

The Stoichiometric air-fuel ratio by volume for combustion of carbon monoxide in air is

For an irrotation flow, the velocity potential lines and the streamlines are always

The difference in ordinate of the shear curve between any two sections is equal to the area under

Bevel gears are used to transmit rotary motion between two shafts whose axes are

According to law of gearing

The condition for correct steering of a Davis steering gear is

where a = Angle of inclination of the links to the vertical