I.C ENGINE MCQ

Q.1 The air standard efficiency of an Otto cycle compared to diesel cycle for the given compression ratio is____.

A. More

B. Less

C. Same

D. None of the above

Ans-: A

Q.2 fuel oil consumption guarantees for I.C. engine are usually based on ___.

A. High heat value of oil

B. Low heat value of oil

C. Net calorific value of oil

D. All of the above

Ans-: A

Q.3 In I.C. engine the ratio of volume of air in cylinder before compression stroke and after compression stroke is known as __.

A. Expansion ratio

B. Compression ratio

C. Efficiency of engine

D. Air- fuel ratio

Ans-: B

Q.4 if the intake air temperature of IC engine increases, its efficiency will ?

A. Decreases

B. Increases

C. Same

D. Depends on other factor

Ans-: A

Q.5 An engine indicator is used to determine the following

A. Temperature

B. Speed

C. M.e.p. and I.H.P.

D. BHP

Ans-: C

Q.6 the requirement of a petrol engine during starting compared to theoretical air required for complete combustion is__.

A. Same

B. More

C. Loss

D. Variable

Ans-: C

Q.7 which of the following is not an internal combustion engine?

A. 2 stroke and 4 stroke engine

B. Steam engine

C. Diesel engine

D. Gas turbine

Ans-: B

Q.8 as a result of detonation in an IC engine, following parameter attains very high value.

A.  Rate of rise of temperature

B. Rate of rise of pressure

C. Peak Temperature

D. Peak  pressure

Ans-: B

Q.9 in diesel engine the diesel fuel injected into cylinder would burn instantly at about compressed air temperature of ___.

A. 500° C

B. 1500 ° C

C. 2000° C

D. 1000 ° C

Ans-: D

Q.10 The precess of breaking up or a liquid into fine droplets by spraying is called?

A. Atomisation

B. Ionisation

C. Carburetion

D. Vaporization

Ans-: A

Q.11 The camshaft of a four stroke IC engine running at 15,00 RPM will run at _____ rpm.

A. 1500

B. 3000

C. 750

D. 1250

Ans-: C

Q.12 result for supercharging in any engine is to ?

A. Reduce weight and bulk for a given output

B. Increase efficiency

C. Decrease efficiency

D. All of the above

Ans-: A

Q.13 The Magneto uesd in an automobile is basically ___.

A. Capacitor

B. A.C. generator

C. Transformer

D. D.C. generator

Ans-: D

Q.14 in a cycle The Spark lasts roughly for

A. 0.001 sec

B. 0.01 sec

C. 0.1 sec

D. 1.0 sec

Ans-: A

Q.15 The specific fuel consumption of petrol engine compared to diesel engine of same H.P. is 

A. Same

B. Less

C. More

D. Depends on operating conditions

Ans-: C

Q.16 The size of inlet valve of an engine in comparison to exhaust valve is

A. Less

B. More

C. Same

D. Depends on engine 

Ans-: A

Q.17 The minimum cranking speed in case of petrol engine is about

A. 100 to 150 RPM

B. 250 to 350 RPM

C. 60 to 80 RPM

D. 10 to 20 RPM

Ans-: C

Q.18 the fuel air ratio in a petrol engine fitted with suction carburettor, operating with dirty air filter as compared to clean air filter will be

A. Lower

B. Higher

C. Same

D. Unaffected

Ans-: B

Q.19 Engine Pistons are usually made of aluminium alloy because it is___.

A. Less wear

B. Absorb shock

C. Lighter

D. Stronger

Ans-: C

Q.20 Air fuel ratio for idling speed of a petrol engine is approximately

A. 1 : 1

B. 1 : 10

C. 2 : 1

D. 10 : 1

Ans-: D

WELDING MCQ-04

Q.1 Which of the following welding process uses consumable electrode ?

A. Laser

B. Arc

C. Gas

D. Metal inert gas

Ans-: D

Q.2 In arc welding operations the current value is decided by ___.

A. Size of the electrode

B. Thickness of electrode

C. Thickness of plate

D. Voltage across the arc

Ans-: A

Q.3 In thermit welding, the iron oxide and aluminium oxide are mixed in the proportion of __.

A. 2 : 1

B. 1 : 1

C. 3 : 1

D. 1 : 2

Ans-: C

Q.4 in the arc welding process, the following order of temperature may be generated ?

A. 1000° C

B. 5500° C

C. 15000 ° C

D. 8000 ° C

Ans-: B

Q.5 In arc welding, the arc length should be equal to the _____.

A. Diameter of electrode rod

B. Rod diameter

C. Twice the rod diameter

D. None of the above

Ans-: B

Q.6 In which welding process, the electrode gets consumed ?

A. Resistance

B. Friction

C. Arc

D. Gas

Ans-: C

Q.7 The strength of properly welded joint as compared to base metal would be ?

A. More

B. Less

C. Same

D. None of the above

Ans-: A

Q.8 In which welding process, arc blow occurs

A. Arc welding 

B. Gas welding

C. Friction welding

D. Resistance welding

Ans-: A

Q.9 Metal deposited on to the workpiece from the electrode is ______.

A. Falls because of gravity

B. Attracted due to electromagnetic action

C. Forced across the arc

D. None of the above

Ans-: C

Q.10 In the mannual tungsten inert gas welding, the angle of the electrode holder with the direction of welding is ____.

A. 30°

B. 45°

C. 70°

D. 180°

Ans-: C

WELDING MCQ-03

Q.1 In resistance welding, the voltage used for heating is ____.

A. 550 V

B. 200 V

C. 10 V

D. 100 V

Ans-: C

Q.2 The forge welding is best suited for which material?

A. High carbon steel

B. Wrought iron

C. Cast iron

D. High speed steel

Ans-: B

Q.3 For which material, preheating is essential in welding process?

A. Cast iron

B. Stainless steel

C. High speed steel

D. Aluminum

Ans-: A

Q.4 which welding process is best for grey cast iron?

A. Tungsten inert gas

B. Metal inert gas

C. Arc

D. Oxy-acetylene

Ans-: D

Q.5 Laser welding finds widest application in which industry?

A. Process industry

B. Heavy industry

C. Structural industry

D. Electronic industry

Ans-: D

Q.6 In welding process , edge preparation is not required upto what thickness of plate?

A. 8 mm

B. 4 mm

C. 10 mm

D. 5 mm

Ans-: B

Q.7 The phenomenon of weld decay occurs in which material?

A. Carbon steel

B. Stainless steel

C. Brass

D. Cast iron

Ans-: B

Q.8 In which type of welding any type of confi-guration can be welded?

A. Arc 

B. Metal inert gas

C. Friction

D. TIG

Ans-: C

Q.9 Grey cast iron is usually welded by ____.

A. Arc welding

B. Gas welding

C. Friction welding

D. Metal inert gas welding

Ans-: B

Q.10 TIG welding is best suited for which material ?

A. Aluminum

B. Cast iron

C. Silver

D. Gold

Ans-: A

WELDING MCQ -02

Q.1 Butt welding or upset welding is used for joining members of approximately __________.

A. Different cross-section

B. Equal cross-section

C. Depend on material

D. Depends on electrode 

Ans-: B

Q.2 The electrode is used in the resistance welding have which type of quality?

A. High electrical conductivity

B. Water cooled

C. High Heat conductivity

D. Good Mechanical strength

E. All of the above

Ans-: E

Q.3 Brazing is used for joining ____.

A. All metals

B. Dissimilar combination of metals

C. Only cast iron and steel

D. A+ B

Ans-: D

Q.4 In welding condition , when longitudinal shear is present then _____ weld is used.

A. Butt joint

B. T - joint

C. Lap joint

D. None of the above

Ans-: B

Q.5 In tungsten inert gas welding, following gases are used ?

A. Argon and neon

B. CO2 and H2

C. Helium and neon

D. Argon and helium

Ans-: D

Q.6 Two sheets of same material but different thickness can be butt welded by 

A. Pressure applied

B. Time duration of current

C. Changing the size of one electrode

D. Adjustment of the current

Ans-: C

Q.7  Copper is very difficult to be ____ welded.

A. Spot

B. Butt

C. T- joint

D. Lap joint

Ans-: A

Q.8 In metal inert gas welding process __.

A. Flux is required

B. Flux is not required

C. High welding speed required

D. None of the above

Ans-: B

Q.9 Grey cast iron is best welded by the ___.

A. Arc welding

B. Oxy-acetylene welding

C. MIG welding

D. TIG welding

Ans-: B

Q.10 In gas welding heat is supplied by burning a mixture of oxygen and ___ gas.

A. Hydrogen

B. Methane

C. Acetylene

D. CO2

Ans-: C

WELDING MCQ-01

Q.1 A pool of molten metal is used in which type of welding process?

A. Tungsten inert gas

B. Metal inert gas

C. Electroslag

D. Submerged arc

Ans-: C

Q.2 In arc welding, arc is created between the electrode and work by the ___.

A. Contact resistance

B. Voltage

C. Flow of current

D. Workpiece

Ans-: A

Q.3 Flux is a material which is used for ?

A. Slow consumption of electrode

B. Higher performance

C. Coating the electrode

D. All of the above

Ans-: C

Q.4 In arc welding, eyes need to be protected against __.

A. Gases

B. Infra-red rays

C. Ultraviolet rays

D. B + C

Ans-: D

Q.5 Which of the following is not a type of welding ?

A. Gas welding

B. Resistance welding

C. Thermit welding

D. Forge welding

E. Current welding

Ans-: E

Q.6 The arc welding is done with the ______ electrode.

A. Metal

B. Carbon or metal 

C. Aluminum

D. Tungsten

Ans-: B

Q.7 Which of the following welding process uses non-consumable electrode?

A. TIG welding

B. MIG welding

C. Laser welding

D. Plasma welding

Ans-: A

Q.8 For arc welding, the open circuit voltage is of the order of ___.

A. 10 to 40 volts

B. 40 to 95 volts

C. 75 to 95 volts

D. 5 to 10 volts

Ans-: B

Q.9 In arc welding , the selection of diameter of electrode is based on which criterion?

A. Current uses

B. Material to be weld

C. Thickness of material

D. Type of welding process

Ans-: C

Q.10 The material which is used for coating the electrode is called ?

A. Flux

B. Coating material

C. Slag

D. Binder

Ans-: A

MECHANISM AND MACHINE MCQ ON GEARS, VIBRATION, GOVERNOR

Q.1 The power of a porter governor is inversely proportional to ____.

A. S/2

B. S^2

C. S

D. S ^3

Ans-: B

Q.2 The weight of a porter governor is inversely proportional to_____.

A. S^2

B. ω

C. ω ^2

D. S

Ans-: C

Q.3 The stress in the disc type flywheel as compared to rim type flywheel is ___.

A. Greater

B. Less

C. Equal

D. None of the above

Ans-: A

Q.4 The effort of a porter governor is proportional to percentage increase in the __.

A. Speed 

B. Inversely proportional to speed

C. Velocity

D. None of the above

Ans-: A

Q.5 In which type of engine the cylinders are arranged along the radial lines ?

A. Motorcycle engine

B. Cars engine

C. Trucks engine

D. Aero engine

Ans-: D

Q.6 Which box is placed between the engine and clutch in automobiles?

A. Tool box

B. Gear box

C. Black box

D. Oil box

Ans-: B

Q.7 Which type of gears used for speed reduction of 50 : 1 ?

A. Bevel

B. Spur

C. Worm wheel

D. Herringbone

Ans-: C

Q.8 A single row six cylinder radial engine has following number of cranks?

A. Zero

B. Two

C. Three

D. One

Ans-: D

Q.9 The number of degrees of freedom in a continuous system would be ___.

A. Zero

B. Two

C. One

D. Four

Ans-: C

Q.10 The height of a simple watt governor is proportional to ___.

A. Speed ( N )

B. 1/ N

C. N ^2

D. None of the above

Ans-: A

multiple choice questions on gears, vibration, Governor etc.

Q.1 At node of the shaft , vibration are __.

A. Zero

B. Corresponding to natural frequency

C. Minimum

D. Maximum

Ans-: B

Q.2 The following numbers of nodes will have a shaft if it carrying two rotors at ends?

A. 1

B. 3

C. Zero

D. 2

Ans-: A

Q.3 Following degree of freedom a vibrating beam has ?

A. Zero

B. 1

C. 2

D. 3

Ans-: C

Q.4 The type of teeth provided on a gear used in sugar crushing machinery is ____.

A. Paraboloid

B. Involute

C. Hyperboloid

D. Cycloidal

Ans-: D

Q.5 A shaft carrying three rotors will have the following number of nodes ?

A. 2

B. 3

C. 5

D. 10

Ans-: A

Q.6 The following number of natural frequen-cies a three rotor system has ?

A. 1

B. 2

C. 3

D. 4

Ans-: B

Q.7 The ratio of mean speed of governor to governor speed range is known as ____.

A. Governor ratio

B. Sensitivity of Governor

C. Efficiency of Governor

D. Working capacity of Governor

Ans-: B

Q.8 What is the name given to gear trains where the axes of gears have motion?

A. Reverted gear train

B. Cycloidal gear train

C. Epicyclic gear train

D. None of the above

Ans-: C

Q.9 Scott-Russel Mechanism is used for generating a ______.

A. Circular path

B. Angular path

C. Straight line

D. Rectangular shape

Ans-: C

Q.10 Fast pulley used to transmit the _____.

A. Power

B. Energy

C. Work

D. Material

Ans-: A

MECHANISM AND MACHINE MCQ based on gears , vibration, gear train, Governor etc.

Q.1 The critical speed of a rotating shaft depends upon ____.

A. Mass

B. Velocity

C. Mass and stiffness

D. Weight

Ans-: C

Q.2 Cam and follower is a _____ type of pair .

A. Close

B. Open

C. Linked

D. Loose

Ans-: B

Q.3 The rate of decay of oscillations is known as the ?

A. Damping coefficient

B. Critical damping

C. Logarithmic decrement

D. All of the above

Ans-: C

Q.4 Which of the following effect is more dangerous for a ship?

A. Waving

B. Pitching

C. Rolling

D. Steering

Ans-: B

Q.5 In forced vibrations the magnitude of damping force at resonance equals to ____.

A. Spring force

B. Zero

C. Infinite

D. Impressed force

Ans-: D

Q.6 In the steady state forced vibrations, the phase lag at resonance condition is _____.

A. 90 ° 

B. 0 °

C. 45 °

D. 180 °

Ans-: A

Q.7 In gears , the tip of the tooth of a mating gear digs into the portion between base and root circle then what type of effect is done.

A. Increase speed

B. Interference takes place

C. Gears move smoothly

D. None of the above

Ans-: B

Q.8 For underdamped vibrating system, the amplitude of vibration with reference to time .

A. Remain constant

B. Increases linearly

C. Decrease exponentially

D. None of the above

Ans-: C

Q.9 The ratio of actual damping coefficient to the critical damping coefficient is called the?

A. Damping factor

B. Transmissibility

C. Magnification factor

D. None of the above

Ans-: A

Q.10 The damping force is proportional to the velocity .

A. In forced vibration system

B. In underdamped vibration system

C. In damped vibration system

D. All of the above

Ans-: C

MECHANISM AND MACHINE MCQ ON GEAR

Q.1 Bevel gears have their teeth____.

A. Curved over the wheel rim

B. Cut on the surface of the frusta of cones

C. Inclined to wheel rim

D. Straight over the wheel rim

Ans-: B

Q.2 The product of circular pitch and diameteral pitch is equal to the _____.

A. Module

B. Unity

C. 1

D. π

Ans-: D

Q.3 A gear whose tooth traces are straight line generators of the cone is called ?

A. Hypoid gear

B. Straight bevel gear

C. Spiral bevel gear

D. None of the above

Ans-: B

Q.4 The tooth traces of the spiral bevel gear are _____.

A. Spiral

B. Straight

C. Curved

D. Zig-zag

Ans-: C

Q.5 Worm gears are generally used when the high speed reduction is required. What is the ratio ?

A. 5:1

B. 1:10

C. 2:5

D. 10:1

Ans-: D

Q.6 The sum of the arc of approach and the arc of recess is known as ___.

A. Arc of action

B. Arc of recess

C. Arc of approach

D. None of the above

Ans-: A

Q.7 The arc measured on pitch circle from the point of beginning of contact to the pitch point is called the ____.

A. Arc of action 

B. Arc of approach

C. Arc of recess

D. All of the above

Ans-: B

Q.8 The acute angle between the tangent to the helix and a plane perpendicular to axis of cylinder is ?

A. Helix angle

B. Base angle

C. Acute angle

D. Lead angle

Ans-: D

Q.9 The acute angle between the tangent to the helix and axis of the cylinder on which teeth are cut is called ?

A. Acute angle

B. Base angle

C. Lead angle

D. Helix angle

Ans-: D

Q.10 Which of the following is not the gear for non- parallel, non- intersecting shafts ?

A. Worm

B. Hypoid

C. Bevel

D. Helical

Ans-: C

multiple choice questions on gears and gear terminology

Q.1 The ratio of number of teeth and pitch circle diameter is called _____.

A. Diameteral pitch

B. Module

C. Pitch

D. Teeth diameter

Ans-: A

Q.2 The pitch circle diameter of an involute gear is dependent of the _____.

A. Base diameter 

B. Tooth thickness

C. Pressure angle

D. Addendum

Ans-: C

Q.3 Which of the following is not a type of gear ?

A. Helical

B. Spur

C. Circular

D. Bevel

Ans-: C

Q.4 Gears are used generally when the centre distances are relatively ____.

A. Short

B. Long

C. Variable

D. Zero

Ans-: A

Q.5 Which gear is a cylindrical whose tooth traces are straight helices i.e.,teeth are inclined at an angle to the gear axis.

A. Spur gear

B. Helical gear

C. Worn gear

D. Bevel gear

Ans-: B

Q.6 Which gear is a spur gear of infinite diameter?

A. pinion

B. Worn gear

C. Herringbone gear

D. Rack

Ans-: D

Q.7 Bevel gears are used to transmit _______ motion between the two shafts.

A. Circular

B. Straight

C. Rotary

D. Reciprocating

Ans-: C

Q.8 The pressure angle for involute gears is ?

A. Zero

B. Variable

C. Depend on size of teeth

D. always constant

Ans-: D

Q.9 If the peripheral velocity of gears lies between 3-15 m/sec then it is called ___.

A. High velocity gear

B. Low velocity gear

C. Medium velocity gear

D. None of the above

Ans-: C

Q.10 Pitch circle is always _____ than the base circle.

A. Bigger 

B. Smaller

C. Equal

D. Constant

Ans-: A

MECHANISM AND MACHINE MCQ -07 ON VIBRATION

Q.1 The motion completed in the time interval of a period is called ____.

A. Period

B. Frequency

C. Cycle

D. Time

Ans-: C

Q.2 In vibration after initial displacement, no external force act and the motion is maintained by the internal elastic forces is called ____________ vibration.

A. Free 

B. Damped

C. Natural

D. Forced 

E. A+ C

Ans-: E

Q.3 The number of complete cycles of motion in a unit interval of time is known as ____.

A. Frequency

B. Time

C. Period

D. Vibration period

Ans-: A

Q.4 The interval of time taken by the motion to repeat itself is known as the _____.

A. Cycle

B. Period

C. Frequency

D. None of the above

Ans-: B

Q.5 Due to the internal and external resistances, the energy processed by the system is gradually dissipated ,such type of vibration is known as the

_____.

A. Free vibration

B. Damped vibration

C. Torsional vibration

D. Forced vibration

Ans-: B

Q.6 When the periodic disturbing force is applied to the body, then vibrations have same frequency as the applied force is called ?

A. Natural vibration

B. Damped vibration

C. Torsional vibration

D. Forced vibration

Ans-: D

Q.7 Resonance is caused when the frequency of the external force coincides with the _____ of the system.

A. Natural vibration 

B. Force

C. Natural frequency

D. Vibration

Ans-: C

Q.8 Which of the following is not a type of vibration?

A. Free

B. Forced

C. Damped

D. Periodic 

Ans-: D

Q.9 If the damping factor for a vibrating system is unity, then the system is called ____ system.

A. Over damped

B. Under damped

C. Critically damped

D. Not damped

Ans-: C

Q.10 In forced vibrations the magnitude of damping force at resonance equals to _____.

A. Zero

B. Impressed force

C. Inertia force

D. Spring force

Ans-: B

MECHANISM AND MACHINE MCQ-06

Q.1 Which of the following is governor used in the gramophone ?

A. Pickening

B. Hartnell

C. Porter

D. Centrifugal

Ans-: A

Q.2 Which of the following is not a flexible coupling ?

A. Muff

B. Oldham's 

C. Universal

D. Bushed pin

Ans-: A

Q.3 Practically the sensitiveness of Watt and porter governor are ?

A. Double

B. Half

C. Same

D. 1/3

Ans-: C

Q.4 The pressure angle for involute gears is ___.

A. Depending on type of meshing

B. Depending on size of teeth

C. Variable

D. Always constant

Ans-: D

Q.5 Flank is the surface of gear tooth ________ the pitch surface.

A. Above

B. Below

C. Constant

D. None of the above

Ans-: B

Q.6 Gear box of a car utilises_______.

A. Simple train

B. Complex train

C. Compound train

D. None of the above

Ans-: C

Q.7 Which gears are used for equal speed?

A. Spur gear

B. Bevel gear

C. Mittre gear

D. All of the above

Ans-: C

Q.8 The transverse section of a helical gear is identical to _____.

A. Bevel gear

B. Worm gear

C. Spur gear

D. Mittre gear

Ans-: C

Q.9 The surface of the gear tooth below the pitch surface is called ____.

A. Face

B. Flank

C. Tooth space

D. Tooth thickness

Ans-: B

Q.10 Muff coupling is a ______ coupling.

A. Non- flexible

B. Flexible

C. Semi flexible

D. Hard

Ans-: A

Mechanical governor and types of governor with working principal

GOVERNORS -: 

Governor is a mechanical part of an engine which maintain a constant mean speed of rotation of the crank shaft over long periods during which the load on engine may vary, by controlling the fuel input. Governor supply the fuel to the engine with variation of load on the engine and maintain constant speed.

WORKING PRINCIPAL OF GOVERNOR -:              The mechanical  governors uses the flyweights to create a force based off of the crankshaft speed which is balanced by the force of governor spring. The top engine speed is varied by the increasing spring force to run faster or decreasing the force to run slower. The governor spring wants to open the throttle and governor tries to close the throttle . The interaction of the governor spring and the mechanical governor holds the throttle at the desired engine rpms based upon a force balance and the load or operating conditions.

There are different types of governors -: 

1. Centrifugal governor.                                              2. Inertia governor.                                                      3. Watt governor.                                                        4. Porter governor.                                                      5. Hartnell governor.

1. Centrifugal governor -:                                          In centrifugal governor, governor balls are caused to revolve about the axis of the shaft. For each speed of rotation there is a fixed position of balls when the centrifugal force is just balanced by the inward controlling force exerted by springs. The movement of the balls is transmitted by governor mechanism to control the amount of the  energy supplied to the engine.

2. Inertia governor -:                                                  In this type of governor the balls are so arranged that the inertia force caused by an angular acce- leration or retardation of the governor shaft tend to alter their position and the displacement of the governor balls being controlled by springs. It has rapid response to the effect of a change of load, because displacement of the balls is proportional to the rate of change of speed of rotation.

3. Watt governor -:                                                      The watt governor height is independent of the weight of the balls and length of the supporting arms of the governor. The height of governor is varies inversely as the square of the speed.             Height " h " = g / w^2.      

STRENGTH OF MATERIAL MCQ-10

Q.1 The ratio of number of teeth and pitch circle diameter is called ?

A. Diameteral pitch

B. Pitch

C. Addendum

D. Module

Ans-: A

Q.2 The circle passing through the bottom of the teeth of gear is known as ____.

A. Prime circle

B. Base circle

C. Dedendum circle

D. Addendum circle

Ans-: C

Q.3 The transverse section of a helical gear is identical to the ______ gear.

A. Bevel

B. Worm

C. Spur 

D. Helical

Ans-: C

Q.4 The difference between the addendum and dedendum is known as ______.

A. Backless

B. Clearance

C. Flank

D. Module

Ans-: B

Q.5 The path of contact in involute gears is a____.

A. Curved line

B. Circle

C. Cycloidal 

D. Straight line

Ans-: D

Q.6 Bevel gears are used to transmit ____ motion between two shafts .

A. Reciprocating

B. Rotary

C. Straight line

D. None of the above

Ans-: B

Q.7  Which of the following are spring loaded type governor?

A. Hartnell

B. Proel

C. Gravity

D. All of the above

Ans-: A

Q.8 Which of the following is gravity controlled type governor?

A. Hartnell

B. Watt 

C. Pendulum

D. Porter

Ans-: D

Q.9 A cam and follower constitute ____ pair.

A. Lower

B. Higher

C. Kinematic

D. Link

Ans-: B

Q.10 A joint of two elements permitting relative motion is called ?

A. Lower pair

B. Higher pair

C. Kinematic pair

D. None of the above

Ans-: C

TERMINOLOGY OF GEAR TOOTH

 Terminology of gear tooth 

1.Base circle -: It us the circle from which involute form is generated. only the base circle on a gear is fixed and unalterable.

2.pitch circle -: It us an imaginary circle most use-ful in calculations. It my be noted that an infinite number of pitch circle can be chosen,each asso-ciated with its own pressure angle.

3.Module -: It is defined as the length of the pitch circle diameter per tooth. Thus, if pitch circle diameter of gear be D and number of teeth n, then module (m) = D/n .

4.Pitch circle diameter-: It is the diameter of a circle which by pure rolling action would produce the same motion as the toothed gear wheel. this the most important diameter in gears.

5.Circular pitch -: It the arc distance measured around the pitch circle from the flank of one tooth to a similar flank in the next tooth.

6.Clearance -: This is the radial distance from the tip of a tooth to the bottom of a mating tooth space when the teeth are symmetrically engaged.

7. Diameteral pitch -: The diameteral pitch can be defined as the number of teeth per inch of the pitch circle diameter.

8. Addendum -: Addendum is the radial distance from the pitch circle to the tip of the tooth.

9. Dedendum -: This is the radial distance from the pitch circle to the bottom of tooth space.

Dedendum = Addendum + Clearance 

                    = 1 m + 0.157 m. = 1.157 m

10. Blank diameter -: This is the diameter of the blank from which gear is cut . It is equal to pitch circle diameter plus twice the addenda.

11. Tooth thickness -: The tooth thickness is the arc distance measured along the pitch circle from its intercept with one flank to it's intercept with the other flank of the same tooth.

MECHANISM AND MACHINE MCQ-05

Q.1 In the reciprocating engine Mechanism,the number of links and instantaneous centres are

A. 4 , 5

B. 4 , 6

C. 5 , 4

D. 5 , 6

Ans-: B

Q.2 The number of dead centres in a crank driven slider crank Mechanism are ___.

A. 2

B. 5

C. 4

D. Zero

Ans-: A

Q.3 Base circle decide the size of the ____.

A. Crank

B. Cam

C. Gear

D. Screw

Ans-: B

Q.4 Cylindrical cams can be classified as 

A. Circular

B. Tangent

C. Reciprocating

D. None of the above

Ans-: D

Q.5 Throw of a cam is the maximum distance of follower from ____.

A. Pitch circle

B. Root circle

C. Inner circle

D. Base circle

Ans-: D

Q.6 A circle passing through the pitch point with its centre at the centre of cam axis is known as

A. Base circle

B. Root circle

C. Prime circle

D. None of the above

Ans-: C

Q.7 A watt governor could be classified as the __.

A. Pendulum type governor

B. Dead weight type governor

C. Inertia type governor

D. Centrifugal type governor

Ans-: A

Q.8 Which type of lubricant a rope brake dynamometer uses?

A. Water 

B. Oil

C. Grease

D. No lubricant use

Ans-: D

Q.9 Which type of brake is commonly used on the train Biggie's?

A. Hand brake

B. Shoe brake

C. Electric brake

D. Internal expanding

Ans-: B

Q.10 A Porter governor could be classified as

A. Inertia type governor

B. Pendulum type governor

C. Dead weight type governor

D. None of the above

Ans-: C

MECHANISM AND MACHINE MCQ-04

Q.1 A cam Mechanism imparts _____ motion.

A. Reciprocating

B. Rotating

C. Oscillating

D. All of the above

Ans-: D

Q.2 A kinematic chain requires at least

A. 2 link and 2 turning pair

B. 4 link and 3 turning pair

C. 3 link and 4 turning pair

D. 4 link and 4 turning pair

Ans-: D

Q.3 How many links  Hart Mechanism has ?

A. 6 links

B. 5 links

C. 8 links

D. 1 links

Ans-: A

Q.4 A quarternary joint is equivalent to the _____.

A. One binary joint

B. Two binary joint

C. Three binary joint

D. Four binary joint

Ans-: C

Q.5 The frequency of oscillation at moon compared to earth will be ?

A. 5 times more

B. 2.44 times less

C. 4.2 times more

D. Zero

Ans-: B

Q.6 The main disadvantage of the sliding pair is that it is ____.

A. Wear rapidly

B. Bulky

C. Complicated design

D. A+ B

Ans-: D

Q.7 Which of the following has eight links?

A. Hart Mechanisms

B. Pantograph Mechanism

C. Peaucellier Mechanism

D. None of the above

Ans-: C

Q.8 The approximate straight line Mechanism is a

A. Six bar linkage

B. Four bar linkage

C. Eight bar linkage

D. Two bar linkage

Ans-: B

Q.9 Peaucellier's Mechanism is used to produce mathematically exact _______ motion.

A. Straight line motion

B. Circular line motion

C. Rotating motion

D. None of the above

Ans-: A

Q.10 The part of tooth surface which is above the pitch surface is called?

A. Tooth space

B. Face of the tooth

C. Tooth width

D. None of the above

Ans-: B

MECHANISM AND MACHINE MCQ-03

Q.1 The tendency of a body to resist change from rest or motion is known as___.

A. Inertia

B. Mass

C. Volume

D. Energy

Ans-: A

Q.2 When a ship travels in a sea, which of the effect is more dangerous 

A. Pitching

B. Rolling

C. Steering

D. None of the above

Ans-: A

Q.3 A belt transmitting hourse power is generally dependent upon the ____.

A. Speed of pulley

B. Tension on slack side of belt

C. Tension on tight side of belt

D. Radius of pulley

E. All of the above

Ans-: E

Q.4 In an ideal machine, the output as compared to input is ____.

A. More

B. Less

C. Equal

D. Depending on efficiency

Ans-: C

Q.5 Idler pulley is used for applying ____.

A. Stress

B. Force

C. Power

D. Tension

Ans-: D

Q.6 The indicator using Watt mechanism is known as 

A. Thomson indicator

B. Richard indicator

C. Watt indicator

D. None of the above

Ans-: B

Q.7 The power is transmitted in the automobiles from gear box to differential through the ____.

A. Universal joint

B. Bevel joint

C. Hooke's joint

D. Knuckle joint

Ans-: C

Q.8 A typewriter constitutes ___.

A. Machine

B. Structure

C. Joint

D. Mechanism

Ans-: D

Q.9 The module is equal to ( In a gear drive)

A. 1/ circular pitch

B. 1/ diameteral pitch

C. 2/ diameteral pitch

D. Diameteral pitch/ circular pitch

Ans-: B

Q.10 A pantograph is a Mechanism with the ____.

A. Rolling pair

B. Turning pair

C. Lower pair

D. Higher pair

Ans-: C

MECHANISM AND MACHINE MCQ-02

Q.1 The number of links in pantograph Mechanism is ____.

A. 2

B. 3

C.5

D.3

Ans-: D

Q.2 The motion transmitted between the teeth of gears in mesh is ___.

A. Rolling

B. Partly rolling

C. Partly sliding

D. B+C

An-:D

Q.3 In higher pair, the relative motion is combination of sliding and_____.

A. Rotary

B. Turning

C. A+B

D. None of the above

Ans-: B

Q.4 The Hooke's joint consists of _____ .

A. Two forks

B. Three forks

C. Five forks

D. One forks

Ans-: A

Q.5 Ball bearing and roller bearing is the example of _____.

A. Sliding pair

B. Higher pair

C. Rolling pair

D. Lower pair

Ans-: C

Q.6 In gear tooth the radial distance from the pitch circle to the bottom of the tooth space is known as_.

A. Addendum

B. Dedendum

C. Module

D. Pitch circle

Ans-: B

Q.7 In gear tooth the radial distance from the pitch circle to the tip of the tooth is called ?

A. Dedendum

B. Pitch circle

C. Module

D. Addendum

Ans-: D

Q.8 Any combination of gear wheels by means of which motion is transmitted from one shaft to other is known as _____.

A. Gear bus

B. Gear train

C. Gear cycle

D. Gear combination

Ans-: B

Q.9 The length of the pitch circle diameter per tooth is called___.

A. Module

B. Addendum

C. Dedendum

D. Pitch circle

Ans-: A

Q.10 Dedendum is equal to ___.

A. Addendum + clearance

B. Addendum + module

C. Module + pitch circle

D. None of the above

Ans-: A

MECHANISM AND MACHINE

Q.1 Which of the following is the example of lower pairs?

A. Automobile steering gear

B. Shaft revolving in a bearing

C. Straight line motion Mechanisms

D. All of the above

Ans-: D

Q.2 What is the purpose of link?

A. Transmit motion

B. Act as a support

C. Guide other links

D. All of the above

Ans-: D

Q.3 A simple Mechanism has ____ links.

A. 1

B. 4

C. 2

D. 3

Ans-: B

Q.4 Pulley in a belt drive acts as __.

A. Rolling pair

B. Surface pair

C. Sliding pair

D. All off the above

Ans-: A

Q.5 Which of the following is a lower pair?

A. Belt drive

B. Ball and socket

C. Piston and cylinder

D. B+C

Ans-: D

Q.6 A universal joint is an example of___.

A. Rolling pair

B. Higher pair

C. Lower pair

D. Turning pair

Ans-: C

Q.7 Which of the following is a closed pair ?

A. Lower pair

B. Higher pair

C. Turning pair

D. Sliding pair

Ans-: A

Q.8 A joint of two elements permitting relative motion is known as

A. Kinematic pair

B. Lower pair

C. Higher pair

D. Sliding pair

Ans-: A

Q.9 A pair having a point contact or line contact is called ____.

A. Closed pair

B. Higher pair

C. Turning pair

D. None of the above

Ans-: B

Q.10 Unconstrained rigid link in a plane has ____ of freedom.

A. Three degree

B. Two degree

C. Zero degree

D. None of the above

Ans-: A