WorksheetsMECH FEST
Total questions: 50
Worksheet time: 50mins
If an isometric drawing is made use of isometric scale then the drawings are called __________
Isometric projection
Isometric view
Isometric perception
Orthographic view
If an isometric projection is drawn with true measurements but not with isometric scale then the drawings are called ____________
Isometric projection
Isometric view
Isometric perception
Orthographic view
A plane is held parallel to horizontal plane in which view we can watch drawing on that plane?
Top view
Front view
Back view
Side view
Heat does not spontaneously flow from a colder body to a hotter one. Which of the following thermodynamics law states this?
a) Zeroth law of thermodynamics
b) First law of thermodynamics
c) Second law of thermodynamics
d) Third law of thermodynamics
Stress, like pressure, is always perpendicular to a plane. True or False?
a) True
b) False
True
False
What is tensile stress?
The ratio of original length to the change in length
The ratio of change in length to the tensile force applied
The ratio of tensile force to the change in length
The ratio of change in length to the original length
What is the factor of safety?
The ratio of stress to strain
The ratio of ultimate stress to the permissible stress
The ratio of permissible stress to the ultimate stress
The ratio of longitudinal strain to stress
What is the bending moment at end supports of a simply supported beam?
Maximum
Minimum
Zero
Uniform
During a tensile test on a ductile material ____________
Nominal stress at fracture is higher than the ultimate stress
True stress at fracture is higher than the ultimate stress
True stress a fracture is the same as the ultimate stress
None of the mentioned
Which law states the when a number of loads are acting on a body, the resulting strain, according to principle of superposition, will be the algebraic sum of strains caused by individual loads?
Hooke’s law
Principle of superposition
Lami's theorem
Strain law
In a two stroke engine, the working cycle is completed in two revolutions of the crankshaft.
True
False
. A two stroke cycle engine occupies larger floor area than a four stroke cycle engine.
True
False
In a carnot cycle, the working medium receives heat at a _____________ temperature.
lower
higher
constant
none of the mentioned
The efficiency of an Otto cycle is increased by increasing ___________
pressure ratio
compression ratio
temperature ratio
none of the mentioned
A diesel engine has compression ratio from ____________
6 to 10
10 to 15
16 to 20
25 to 40
Dual cycle is also known as ____________
Diesel cycle
Joule cycle
Mixed cycle
None of the mentioned
The force which acts along the radius of a circle and directed ____________ the centre of the circle is known as centripetal force.
away from
towards
at the
none of the mentioned
The coefficient of restitution is 0 for a completely inelastic collision.
True
False
When the nature of contact between the element of a pair is such that it can only slide relative to the other, the pair is known as a
screw pair
spherical pair
turning pair
sliding pair
The quick return mechanism which is an inversion of 4-bar linkage is
Drag link mechanism
Whitworth quick return mechanism
Crank and slotted lever mechanism
None of the mentioned
Which of the following is the basic principle of fluid mechanics?
Momentum principle
Energy equation
Continuity equation
All of the mentioned
Which of the following components is mainly manufactured by performing metal forging?
Piston
Engine block
Connecting rod
Crankcase
Which of the following is not a type of arc welding?
Plasma
Electro-slag
Submerged
Air-acetylene
The distance from the centre of arc to the tip of electrode is called what?
a) Arc distance
b) Arc length
c) Arc crater
d) Arc depth
Arc distance
Arc length
Arc crater
Arc depth
Which of the following factor is not considered while selecting a kind of pattern?
Quantity of casting
Types of moulding method
Shape of the casting
Nature of moulding process
In machine design, which of the following joins two rotating shafts to each other?
Key
Coupling
Gear
Belt drive
What are the two types of rigid flange couplings in machine design?
Stable and unstable
Flexible and non-flexible
Protected and unprotected
Deformable and non-deformable
Which of the following process is not the part of working of a 4 stroke I.C Engine?
Compression
Suction
Exhaust
Turbine flow
. 4-stroke engine has one power stroke per 2 revolutions hence turning moment diagram is uniform.
True
False
When the sleeve of a Porter governor moves upwards, the governor speed
increases
decreases
remains unaffected
none of the mentioned
Which of the following is a method of heat transfer?
Convection
Radiation
Conduction
All of the mentioned
Which of the following is an example of steady-state heat transfer?
Electric bulb cools down by the surrounding atmosphere
Chilling effect of cold wind on a warm body
Boilers and turbines
Cooling of I.C engine
Which among the following is always true for mass transfer to occur?
Difference in concentration
Difference in chemical potential
Difference in pressure
Difference in temperature
Why is the study of vibrations strongly recommended?
to stop the mechanical systems
to stop the structural systems
to help the mechanical systems to vibrate more
to identify the result of Oscillations of any structural or mechanical system
What is the branch of fluid dynamics that deals with the behaviour of gases, particularly under high-speed and compressible conditions?
Aerodynamics
Gas Dynamics
Fluid Mechanics
Thermodynamics
Which of the following is not a part of the transmission system?
Clutch
Wheels
Gear box
Axles
Which of the following is a classification of IC Engine?
Otto cycle engine
Four-stroke engines
S.I Engines
All of the above
The temperature of the piston will be more at ______ in an automobile engine.
The piston rings
The piston walls
The crown of the piston
The skirt of the piston
Which of the following material is used to make connecting rod?
Cast iron
Mild steel
Forged steel
Tool steel
Which of the following serves as a cooling and ventilation of engine lubricating oil?
piston
cam shaft
oil sump
crank case
What is Refrigeration?
Refrigeration is the process of removing heat from a substance and cooling it to a temperature or below the actual temperature
Refrigeration is the process of adding heat from a substance and cooling it to a temperature
Refrigeration is used to increase the level of humidity in the air by adding heat
None of the mentioned
Which of the following refers to the term C.O.P. of refrigeration?
Cooling for Performance
Coefficient of Performance
Capacity of Performance
Co-efficient of Plant
How is the refrigerant used in the Air refrigeration cycle?
In the compressor
In the condenser
Directly in contact
Not used at all
In traditional machining, which component is made of a relatively harder material?
Tool
Workpiece
Holding device
None of the mentioned
How are the unit injectors operated in a Common rail fuel injection system?
Crankshaft
Rocker arms
Belt
Motor
Which of the following is used to return the excess fuel in the rail to the fuel tank?
Float valve
Relief valve
Hand pump
Governor
In a disc brake, which component provides the pad-to-disc adjustment?
Bleed screw
Piston
Caliper
Piston seal
Which of the following crankcase would result in saving weight also enable cheaper and quick replacement?
iron
nickel
aluminium
chromium
Which of the following provides passages for the flow of cooling water?
crankcase
cylinder block
piston
cylinder head
What is an IC Engine?
the fuel is ignited and burned inside the engine
the fuel is burned inside a combustion chamber
the fuel is ignited inside a combustion chamber
None of the above
