REFRIGERATION OBJECTIVE QUESTIONS

REFRIGERATION OBJECTIVE QUESTIONS

1. A REFRIGERATION SYSTEM

A. REMOVES HEAT FROM A LOW TEMPERATURE BODY AND DELIVERS IT TO HIGH TEMPERATURE BODY
B. REMOVES HEAT FROM A HIGH TEMPERATURE BODY AND DELIVERS IT TO LOW TEMPERATURE BODY
C. REJECTS ENERGY TO A LOW TEMPERATURE BODY
D. NONE OF THE ABOVE

2. RELATIVE COEFFICIENT OF PERFORMANCE IS

A. THEORETICAL COP/ACTUAL COP
B. ACTUAL COP/THEORETICAL COP
C. ACTUAL COP*THEORETICAL COP
D. NONE OF THESE

3. THE CAPACITY OF A DOMESTIC REFRIGERATOR IS IN THE RANGE OF

A. 0. TO 0.3 TR
B. 1 TO 3 TR
C. 3 TO 5 TR
D. 5 TO 7 TR

4. WHEN THE LOWER TEMPERATURE OF A REFRIGERATING MACHINE IS FIXED THEN COP CAN BE IMPROVED BY

A. OPERATING  MACHINE AT HIGHER SPEEDS
B. OPERATING MACHINE AT LOWER SPEEDS
C. RAISING THE HIGHER TEMPERATURE
D. LOWERING THE HIGHER TEMPERATURE

5. AIR REFRIGERATION  WORKS ON

A. REVERSED CARNOT CYCLE
B. BELL COLEMAN CYCLE
C. BOTH A & B
D. STIRLING CYCLE

6. AIR REFRIGERATION IS USED IN

A. COMMERCIAL REFRIGERATORS
B. DOMESTIC REFRIGERATION
C. AIR CONDITIONING
D. GAS LIQUEFICATION

7. DURING REFRIGERATION HEAT IS REJECTED BY REFRIGERANT IN A

A. COMPRESSOR
B. CONDENSER
C. EVAPORATOR
D. EXPANSION VALVE

8. IN A VAPOUR COMPRESSOION SYSTEM THE CONDITION OF THE REFRIGERANT BEFORE PASSING THROUGH THE CONDENSER IS

A. HIGH PRESSURE SATURATED LIQUID
B. WET VAPOUR
C. DRY SATURATED VAPOUR
D. SUPERHEATED VAPOUR

9. THE FORMATION OF FROST ON COOLING COIL IN A REFRIGERATOR

A. INCREASES HEAT TRANSFER
B. IMPROVES COP OF THE SYSTEM
C. INCREASES POWER CONSUMPTION
D. REDUCES POWER CONSUMPTION

10. IN A PRESSURE ENTHALPY CHART THE SPACE TO THE LEFT OF THE SATURATED LIQUID LINE REPRESENTS

A. WET VAPOUR REGION
B. SUPERHEATED VAPOUR REGION
C. SUB COOLED REGION
D. DEGREE OF SUPERHEAT

CLAUSIUS INEQUALITY -THERMODYNAMICS

THEORY OF MACHINES OBJECTIVE QUESTIONS

THEORY OF MACHINES OBJECTIVE QUESTIONS

1. THE CAM AND FOLLOWER USED IN AUTOMOBILE ENGINES IS

A. KNIFE EDGE FOLLOWER
B. FLAT FACED FOLLOWER
C. SPHERICAL FACED FOLLOWER
D. ROLLER FOLLOWER

2. THE CAM FOLLOWER GENERALLY USED IN AIR CRAFT ENGINES IS

A. KNIFE EDGE FOLLOWER
B. FLAT FACED FOLLOWER
C. SPHERICAL FOLLOWER
D. ROLLER FOLLOWER

3. IN A RADIAL CAM THE FOLLOWER MOVES

A. IN A DIREECTION PERPENDICULAR TO CAM AXIS
B. IN A DIRECTION PARALLEL TO CAM AXIS
C. IN ANY DIRECTION IRRESPECTIVE OF THE CAM AXIS
D. ALONG THE CAM AXIS

4. FOR LOW AND MODERATE SPEED ENGINES CAM AND FOLLOWER SHOULD MOVE WITH

A. UNIFORM VELOCITY
B. SIMPLE HARMONIC MOTION
C. UNIFORM ACCELERATION AND RETARDATION
D. CYCLOIDAL MOTION

5. A SPRING CONTROLLED GOVERNOR WILL BE SAID TO BE ISOCHRONOUS WHEN THE CONTROLLING FORCE

A. INCREASES AS RADIUS OF ROTATION DECREASES
B. DECREASES AS RADIUS OF ROTATION INCREASES
C. INCREASES AS RADIUS OF ROTATION INCREASES
D. REMAINS CONSTANT FOR ALL RADII OF ROTATION

6. POWER OF A GOVERNOR IS THE

A. MEAN FORCE EXERTED AT THE SLEEVE FOR A GIVEN PERCENTAGE CHANGE IN SPEED
B. WORKDONE AT THE SLEEVE FOR MAXIMUM EQUILIBRIUM SPEED
C. MEAN FORCE EXERTED AT THE SLEEVE FOR MAXIMUM EQUILIBRIUM SPEED
D. NONE OF THE ABOVE

7. THE EFFORT OF A PORTER GOVERNOR IS EQUAL TO

A. C(m-M)g
B. C(M+m)g
C. C/(M+m)g
D. C/(m-M)g

8. WHICH OF THE GOVERNOR IS USED TO DRIVE A GRAMOPHONE

A. WATT GOVERNOR
B. PORTER GOVERNOR
C. PICKERING GOVERNOR
D. INERTIA GOVERNOR

9. IN A GEAR HAVING INVOLUTE TEETH THE NORMAL TO THE INVOLUTE IS  A TANGENT TO

A. ADDENDUM CIRCLE
B. DEDENDUM CIRCLE
C. PITCH CIRCLE
D. BASE CIRCLE

10. THE SIZE OF A GEAR IS USUALLY SPECIFIED BY

A. PRESSURE ANGLE
B. CIRCULAR PITCH
C. DIAMETRAL PITCH
D. PITCH CIRCLE DIAMETER

STRENGTH OF MATERIAL OBJECTIVE QUESTIONS

STRENGTH OF MATERIAL OBJECTIVE QUESTIONS

1. When a bar of length l , width b and thickness t is subjected to push then

a. length width and thickness increases
b. length increases, width and thickness decreases
c. length, width and thickness decreases
d. length decreases width and thickness increases

2. The volumetric strain is the ratio of

a. original thickness to change in thickness
b. change in thickness to original thickness
c. original volume to change in volume
d. change in volume to original volume

3. When a body is subjected to three mutually perpendicular stresses of equal intensity the ratio of direct stress to the corresponding volumetric strain is

a. young's modulus
b. modulus of rigidity
c. bulk modulus
d. poisson's ratio

4. When a bar is cooled it will develop

a. no stress
b. shear stress
c. tensile stress
d. compressive stress

5. If the modulus of elasticity for a given material is twice its modulus of rigidity, then bulk modulus is equal to

a. 2C
b. 3C
c. 2C/3
d. 3C/2

6. Shear modulus is the ratio of

a. linear stress to linear strain
b. linear stress to linear strain
c. volumetric strain to linear strain
d. shear stress to shear strain

7. A beam extending beyond the supports is called

a. simply supported beam
b. cantilever beam
c. overhanging beam
d. fixed beam

8. A cantilever beam is one

a. fixed at both ends
b. fixed at one end free at other end
c. supported at both ends
d. continuous beam

9. The bending moment at free end of a cantilever beam is

a. zero
b. maximum
c. minimum
d. less than zero

10. The design of a thin cylinder is based upon

a. hoop stress
b. circumferntial stress
c. arithmetic mean of hoop and longitudinal stress
d. geometric mean of hoop and longitudinal stress

THEORY OF MACHINES OBJECTIVE QUESTIONS

1. Which gear is used for connecting two coplanar and intersecting shafts?

a. Spur gear                  b. Helical gear

c. Bevel gear                 d. None of the above

 2.  Module of a gear is

a. D/T               b. T/D               

c. 2D/T             d. 2T/D

3. Length of arc of contact is given by

a. Arc of approach – Arc of recess         

b. Arc of approach + Arc of recess

c. Arc of approach / Arc of recess         

d. Arc of approach x Arc of recess

4.  The type of gears used to connect two non parallel and non intersecting shafts is

a. Spur gear               

b. Helical gear             

c. Bevel gear              

d. Spiral gear

 5.  To connect two parallel and coplanar shafts the following type of gearing is used

a. Spur gear                  b. Bevel gear

c. Spiral gear                d. None of the above

6.  In which of the following type of gear train the first gear and the last gear are co-axial.

a. Simple gear train                

b. Compound gear train

c. Reverted gear train                

d. None of the above

7.  Which gear train is used for higher velocity ratios in a small space?

a. Simple gear train                   

b. Compound gear train

c. Reverted gear train                

d. Epicyclic gear train

8.  Which type of gear train is used in clock mechanism to join hour hand and minute hand?

a. Simple gear train                   

b. Compound gear train

c. Reverted gear train                

d. Epicyclic gear train

9.  Which type of gearing is used in steering system of an automobile?

a. Rack and pinion        b. Worm and wheel

c. Spiral gears               d. None of the above

10.  The sesitivity of isochronous governors is

a. Constant

b. Zero 

c. Infinity

d. None of the above

               

HARTNELL GOVERNOR-SPRING CONTROLLED GOVERNOR

THERMODYNAMICS OBJECTIVE QUESTIONS

A. Temperature-entropy curve (T – s curve) of any thermodynamic process represents

• 1.  either heat absorbed or heat rejected
• 2.  heat rejected
• 3.  none of these
• 4.  heat absorbed

B. The second law of thermodynamics?

• 1.  It is impossible to transfer heat from a body at a lower temperature to a higher temperature, without the aid of an external source.
• 2.  It is impossible to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work.
• 3.  There is a definite amount of mechanical energy, which can be obtained from a given quantity of heat energy.
• 4.  all of the above

C. In an irreversible process there is

1. Gain of heat

2. Loss of heat

3. No gain of heat 

4. No loss of heat

D. Thermal equilibrium with a third body, they are also in thermal equilibrium with each other. This statement is called

• 1.  Zeroth law of thermodynamics
• 2.  Second law of thermodynamics
• 3.  First law of thermodynamics
• 4.  Kelvin Planck's law

E. The measurement of a thermodynamic property known as temperature is based on

• 1.  Zeroth law of thermodynamics
• 2.  Second law of thermodynamics
• 3.  First law of thermodynamics
• 4.  none of these

F. The specific heat at constant volume is

• 1.  the amount of heat required to raise the temperature of unit mass of gas through one degree, at constant volume
• 2.  the amount of heat required to raise the temperature of 1 kg of water through one degree
• 3.  the amount of heat required to raise the temperature of unit mass of gas through one degree, at constant pressure
• 4.  any one of the above

G. Kelvin-Planck’s law deals with

• 1.  conservation of heat
• 2.  conservation of work
• 3.  conversion of heat into work
• 4.  conversion of work into heat

H.  For a perfect gas, according to Boyle’s law (where p = Absolute pressure, v = Volume, and T = Absolute temperature)

• 1.  v/T = constant, if p is kept constant
• 2.  T/p = constant, if v is kept constant
• 3.  p v = constant, if T is kept constant
• 4.  p/T = constant, if v is kept constant

I.  The gas constant (R) is equal to the __________ of two specific heats.

• 1.  difference
• 2.  sum
• 3.  product
• 4.  ratio

J.  In an isothermal process

• 1.  there is no change in temperature
• 2.  all of these
• 3.  there is no change in internal energy
• 4.  there is no change in enthalpy

HYDRAULIC MACHINES OBJECTIVE QUESTIONS

HYDRAULIC MACHINES OBJECTIVE QUESTIONS

1. A PELTON WHEEL TURBINE IS A

A. HIGH HEAD TURBINE
B. LOW HEAD TURBINE
C. MEDIUM HEAD TURBINE
D. VERY LOW HEAD TURBINE

2. WORK DONE BY A TURBINE ..............................UPON THE WEIGHT OF WATER FLOWING PER SECOND.

A. DOES NOT DEPEND
B. DEPEND
C. PARTIALLY DEPEND
D. NONE OF THE ABOVE

3. A PELTON WHEEL TURBINE IS WHICH TYPE OF TURBINE?

A. RADIAL FLOW
B. AXIAL FLOW
C. TANGENTIAL FLOW
D. NONE OF THE ABOVE

4. AN IMPULSE TURBINE IS USED FOR

A. LOW HEAD OF WATER
B. HIGH HEAD OF WATER
C. MEDIUM HEAD OF WATER
D. HIGH DISCHARGE

5. THE GROSS OR TOTAL HEAD OF THE TURBINE IS THE .....................OF THE WATER LEVELS AT THE HEAD RACE AND TAIL RACE.

A. SUM
B. DIFFERENCE
C. PRODUCT
D. DIVISION

6. THE HYDRAULIC EFFICIENCY OF AN IMPULSE TURBINE IS THE

A. RATIO OF ACTUAL POWER DEVELOPED BY THE TURBINE TO THE ENERGY ACTUALLY SUPPLIED BY THE TURBINE
B. RATIO OF ACTUAL WORK AVAILABLE AT THE TURBINE TO THE ENERGY IMPARTED TO THE WHEEL
C. RATIO OF WORK DONE ON THE WHEEL TO THE ENERGY OF THE JET

7. THE HYDRAULIC EFFICIENCY OF IMPULSE TURBINE IS MAXIMUM WHEN VELOCITY OF WHEEL IS.............................OF THE JET VELOCITY.

A. ONE-FOURTH
B. ONE-HALF
C. THREE-FOURTH
D. DOUBLE

8. BRAKING JETS IN AN IMPULSE TURBINE ARE USED

A. TO BREAK THE JET OF WATER
B. TO BRING THE RUNNER TO REST IN SHORT TIME
C. TO CHANGE THE DIRECTION OF RUNNER
D. NONE OF THESE

9.  A PELTON WHEEL IS

A. TANGENTIAL FLOW IMPULSE TURBINE
B. INWARD FLOW IMPULSE TURBINE
C. OUTWARD FLOW IMPULSE TURBINE
D. INWARD FLOW REACTION TURBINE

10. THE OVERALL EFFICIENCY FOR A PELTON WHEEL LIES BETWEEN

A. 0.50 TO 0.65
B. 0.65 TO 0.75
C. 0.75 TO 0.85
D. 0.85 TO 0.90

THERMODYNAMICS OBJECTIVE QUESTIONS

THERMODYNAMICS OBJECTIVE QUESTIONS

1. FIRST LAW OF THERMODYNAMICS IS ALSO CALLED

A. CONSERVATION OF HEAT
B. CONSERVATION OF ENERGY
C. CONSERVATION OF MASS
D. CONSERVATION OF MOMENTUM

2. ENERGY CAN NEITHER BE DESTROYED NOR BE CREATED. THIS STATEMENT IS KNOWN AS

A. ZEROTH LAW
B. FIRST LAW
C. SECOND LAW
D. ENTROPY

3. FOR CONSTANT VOLUME THERMOMETER THE THERMODYNAMIC PROPERTY IS

A. VOLUME
B. PRESSURE
C. MASS
D. TEMPERATURE

4. WHICH OF THE FOLLOWING IS CORRECT?

A. ABSOLUTE PRESSURE    = GAUGE+ATMOSPHERIC PRESSURE
B. GAUGE PRESSURE       = ABSOLUTE+ATMOSPHERIC PRESSURE
C. ATMOSPHERIC PRESSURE = ABSOLUTE+GAUGE PRESSURE
D. ABSOLUTE PRESSURE    = GAUGE+ATMOSPHERIC PRESSURE

5. THE HEAT AND MECHANICAL ENERGIES ARE MUTUALLY CONVERTIBLE. THIS STATEMENT WAS GIVEN BY

A. BOYLE
B. CHARLES
C. JOULE
D. GAY LUSSAC

6. THE SPECIFIC HEAT OF WATER IS

A. 1.817
B. 2.512
C. 4.187
D. 3.254

7. THE UNIT OF ENERGY IN SI UNITS IS

A. JOULE
B. JOULE METER
C. WATT
D. JOULE/METER

8. THE ABSOLUTE TEMPERATURE IS TAKEN AS  IN DEGREE CELSIUS

A. 273
B. -273
C. 237
D. -237

9. IN AN EXTENSIVE PROPERTY OF A THERMODYNAMIC SYSTEM

A. EXTENSIVE HEAT IS TRANSFERRED
B. INTENSIVE HEAT IS TRANSFERRED
C. EXTENSIVE WORK IS DONE
D. EXTENSIVE ENERGY IS UTILISED

10. THE ENTROPY OF UNIVERSE IS CONTINUOUSLY

A. DECREASING
B. INCREASING
C. CONSTANT OR INCREASING
D. FIRST INCREASES THEN DECREASES

SOM-BASIC OBJECTIVE QUESTIONS

STRENGTH OF MATERIAL QUEDTONS

1. RESISTSNCE PER UNIT AREA TO DEFORMATION IS CALLED

A. PRESSURE
B. STRAIN
C. STRESS
D. MODULUS OF ELASTICITY

2. DEFORMATION PER UNIT LENGTH IS CALLED

A. TENSILE STRESS
B. COMPRESSIVE STRESS
C. STRAIN
D. SHEAR STRESS

3. HOOKE'S LAW HOLDS GOOD UPTO

A. YIELD POINT
B. ELASTIC LIMIT
C. BREAKING POINT
D. PLASTIC LIMIT

4. RATIO OF LINEAR STRESS TO LINEAR STRAIN IS CALLED

A. MODULUS OF RIGIDITY
B. MODULUS OF ELASTICITY
C. BULK MODULUS
D. POISSON'S RATIO

5. STRAIN ROSETTERS ARE USED TO MEASURE

A. SHEAR STRAIN
B. LINEAR STRAIN
C. VOLUMETRIC STRAIN
D. LATERAL STRAIN

6. THE ULTIMATE TENSILE STRESS FOR MILD STEEL IS .........................THE ULTIMATE COMPRESSIVE STRESS

A. LESS THAN
B. MORE THAN
C. EQUAL TO
D. NONE OF THE ABOVE

7. ACCORDING TO HOOKE LAW STRESS IS DIRECTLY PROPORTIONAL TO

A. LINEAR STRAIN
B. LATERAL STRAIN
C. VOLUMETRIC STRAIN
D. SHEAR MODULUS

8. THE UNIT OF STRAIN IS

A. N-mm
B. N/mm
C. mm
D. Dimensionless

9. Modular ratio of two materials is the ratio of

A. Shear modulus
B. Modulus of elasticities
C. Shear stress to shear strain
D. Modulus of rigidities

10. Poisson ratio is defined as ratio of

A. Linear to lateral strain
B. Lateral to linear strain
C. Linear stress to linear strain
D. Linear strain to linear stress

WATT INDICATOR MECHANISM-FOUR BAR CHAIN APPLICATION

OSCILLATING CYLINDER ENGINE-SSCM INVERSION

BEAM ENGINE-FOUR BAR CHAIN APPLICATION

ROTARY ENGINE SSCM INVERSION

CENTRIFUGAL GOVERNOR MECHANISM

DOUBLE CRANK MECHANISM

SCOTCH YOKE MECHANISM

ELLIPTICAL TRAMMELS

CRANK AND SLOTTED LEVER MECHANISM

WHITWORTH QUICK RETURN MOTION MECHANISM

DOUBLE ROCKER MECHANISM

CRANK ROCKER MECHANISM

MACHINE DESIGN-POWER TRANMISSION SYSTEM

OLDHAM COUPLING-DOUBLE SLIDER CRANK MECHANISM INVERSION

Oldham coupling is an inversion of double slider crank mechanism. In this the link connecting the two slider is fixed that is frame.
It is used to connect the shafts with lateral misalignment. 

PRODUCTION OBJECTIVE QUESTIONS

PRODUCTION OBJECTIVE QUESTIONS

1. Average cutting speed for turning brass with a high speed cutting tool is

A. 25-31 m/s
B. 15-19 m/s
C. 60-90 m/s
D. 90-120 m/s

2. Lip angle for single point cutting tool is

A. 20-40
B. 40-60
C. 60-80
D. 80-90

3. The surface speed for cylindrical grinding varies from

A. 20-30 m/min
B. 30-50 m/min
C. 10-20 m/min
D. 5-10 m/min

4. Tool made up of cemented carbide wear out faster at

A. Slow speeds
B. High speeds
C. Very high speeds
D. Medium speeds

5. The cutting tool in a milling machine is mounted on

A. Arbor
B. Spindle
C. Knee
D. Column

6. When the cutting edge of tool is dull then chips formed are

A. Continuous chips
B. Discontinuous chips
C. Continuous chips with built up edges
D. No chips are formed

7. Cast iron during machining produces which type of chips?

A. Continuous chips
B. Discontinuous chips
C. Continuous chips with built up edges
D. No chips are formed

8. Drilling is an example of

A. Orthogonal cutting
B. Oblique cutting
C. Simple cutting
D. Uniform cutting

9. A single point thread cutting tool should ideally have

A. Positive rake angle
B. Negative rake angle
C. Zero rake angle
D. Point angle

10. A twist drill is a

A. Side cutting tool
B. End cutting tool
C. Front cutting tool
D. None of these

FLUID MECHANICS QUESTIONS ASKED IN 2014 JE EXAM

FLUID MECHANICS OBJECTIVE QUESTIONS

1. When a fluid is in motion the prrssure a point is same in all directions.  Then the fluid is

A. Real
B. Non newtonian
C. Ideal
D. Newtonian

2. A hydraulic turbine runs at 240 rpm under a head of 9 m. What will be the speed ( in rpm) of the turbine if operating head is 16 m.

A. 320
B. 426
C. 264
D. 230

3. The discharge of a liquid of kinematic viscosity 0.04 m2/s through a 80 mm diameter pipe is 0.32×3.14 m3/s. The flow is

A. Laminar
B. Turbulent
C. Transition
D. Critical

4. The velocity at a point on the crest of a model dam was mentioned to be 1 m/s. The corresponding prototype velocity for a linear scale ratio of 25 , in m/s is

A. 25
B. 2.5
C. 5
D. 0.04

5. Pressure force on the 15 cm diameter headlight of an automobile travelling at 0.25 m/s is

A. 10.4 N
B. 6.8 N
C. 4.8 N
D. 3.2 N

6. A piece of metal of specific gravity 7 floats in mercury og specific gravity 13.6. What fraction of its volume is under mercury.

A. 0.5
B. 0.4
C. 0.515
D. 0.415

7. The ratio of pressures between two points A and B located respectively at depths 0.5 m and 2 m below a constant level of water in a tank is

A. 1:1
B. 1:2
C. 1:4
D. 1:16

8. Froudes number relates

A. Inertia force and gravity force
B. Inertia force and prrssure force
C. Inertia force and surface tension force
D. Inertia force and elastic force

9. In a pitot tube the velocity of flow at a point reduced to zero. That point is called

A. Stagnation point
B. Critical point
C. Metacentre
D. Equilibrium point

10. The velocity distribution in a pipe flow is parabolic if the flow is

A. Uniform, turbulent
B. Uniform,  laminar
C. Non-uniform , steady
D. Rotational , compressible

TOM VIDEO - SHORTEST LINK FIXED DOUBLE CRANK MECHANISM

PRODUCTION OBJECTIVE QUESTIONS ASKED IN PREVIOUS YEARS

PRODUCTION OBJECTIVE QUESTIONS   ( ASKED IN PREVIOUS YEARS)

1. WHICH ONE OF THE FOLLOWING IS AN EXAMPLE OF SOLID STATE WELDING?

A. GAS WELDING

B. ARC WELDING

C. THERMIT WELDING

D. FORGE WELDING



2. THE SHAPE AND SIZE OF SAND GRAINS AFFECTS THE FOLLOWING PROPERTY?

A.  ADHESIVENESS

B. POROSITY

C. REFRACTORINESS

D. STRENGTH



3. CEREALS ARE ADDED TO THE MOULDING SAND TO IMPROVE THE FOLLOWING?

A. POROSITY

B. GREEN STRENGTH

C. HOT STRENGTH

D. EDGE HARDNESS



4. PLASTIC TOYS ARE USUALLY PRODUCED BY USING

A. SHELL MOULDING

B. GREEN SAND MOULDING

C. PLASTER MOULDING

D. INJECTION MOULDING



5. SPOT WELDING, PROJECTION WELDING AND SEAM WELDING BELONG TO THE CATEGORY OF

A. ELECTRICAL RESISTANCE WELDING

B. FORGE WELDING

C. THERMIT WELDING

D. ARC WELDING



6. THE TOOL MATERIAL WHICH HAS HIGH HEAT AND RESISTANCE IS

A. CERAMICS

B. CEMENTED CARBIDES

C. CARBON STEELS

D. MEDIUM ALLOY STEEL



7. TO IMPROVE SURFACE FINISH OF THE CASTING FOLLOWING ADDITIVE IS USED IN THE MOULDING SAND?

A. RESINS

B. OILS

C. WOOD FLOUR

D. SEA COAL



8. THE BINDING MATERIAL USED IN CEMENTED CARBIDES TOOLS IS

A. NICKEL

B. COBALT

C. CHROMIUM

D. CARBON



9. THE RECOMMENDED CLEARANCE ANGLE (IN DEGREES) FOR SINGLE POINT CUTTING TOOL  IS

A. 10

B. 5

C. 8

D. 12



10. WAX PATTERNS ARE USED IN WHICH TYPE OF CASTING?

A. SHELL MOULD CASTING

B. INVESTMENT CASTING

C. HOT CHAMBER DIE CASTING

D. COLD CHAMBER DIE CASTING

FLUID MECHANICS OBJECTIVE QUESTIONS

FLUID MECHANICS OBJECTIVE QUESTIONS

1. WHICH OF THE FOLLOWING IS AN ABSOLUTE QUANTITY?

A. MASS
B. VOLUME
C. DENSITY
D. SPECIFIC WEEIGHT

2. CAPILLARY RISE IS DUE TO

A. ADHESION
B. COHESION
C. ADHESION AND COHESION
D. SURFACE TENSION

3. SURFACE TENSION FOR WATER AIR INTERFACE AT 20 DEGREE CELCIUS IS

A. 0.0987
B. 0.0736
C. 0.0786
D. 0.0473

4. WHY WATER WETS THE SURFACE?

A. COHESION IS MORE
B. ADHESION IS MORE
C. BOTH ADHESION AND COHESION ARE MORE
D. ITS NATURE

5. IF TEMPERATURE RISES THEN DENSITY OF A GAS

A. DECREASES
B. INCREASES
C. FIRST INCREASES THEN DECREASES
D. NO EFFECT

6. A FLUID CAN BE TREATED AS INCOMPRESSIBLE WHEN MACH NUMBER IS

A. GREATER THAN 0.3
B. LESS THAN 0.3
C. EQUAL TO 0.3
D. NONE OF THE ABOVE

7. KEROSENE IS WHICH TYPE OF FLUID

A. NEWTONIAN
B. NON NEWTONIAN
C. VISCOUS
D. RHEOPECTIC

8. BLOOD IS AN EXAMPLE OF

A. DILATANT FLUID
B. BINGHAM PLASTIC FLUID
C. PSEUDOPLASTIC FLUID
D. THIXOTROPIC FLUID

9. PAINTS ARE WHICH TYPE OF FLUIDS?

A. DILATANT
B. BINGHAM PLASTIC
C. THIXOTROPIC
D. RHEOPECTIC

10. SUGAR IN WATER IS AN EXAMPLE OF

A. BINGHAM PLASTIC
B. DILATANT
C. PSEDOPLASTIC
D. NEWTONIAN

THERMODYNAMICS OBJECTIVE QUESTIONS

Thermodynamics objective questions

1.  Which of the following is an Intensive property??

A. Mass
B. Volume
C. Magnetic field
D. Specific volume

2. Which of the variables controls physical properties of a gas??

A. Pressure
B. Volume
C. Temperature
D. All of the above

3. The unit of temperature in S.I. units is

A. Celsius
B. Farehheit
C. Kelvin
D. Rumers

4. According to Gay Lussac's law the pressure of a perfecr gas varies directly as

A. Volume
B. Temperature
C. Specific volume
D. Remains constant

5. Temperature of a gas is produced due to

A. Its heating value
B. Kinetic energy of molecules
C. Attraction between molecules
D. Repulsion between molecules

6. According to kinetic theory of gases absolute zero temperature is obtained when

A. Mass is zero
B. Pressure is zero
C. Kinetic energy is zero
D. Volume is zero

7. Superheated vapour behaves

A. Exactly as gas
B. Average of gas and vapour
C. Approximately as gas
D. As a vapour only

8. The ratio of two specific heats is equal to

A. 0.13
B. 1.3
C. 1.41
D. 1.2

9. The value of n=1 in polytropic process indicates it to be

A. Isochoric process
B. Isobaric process
C. Isothermal process
D. Adiabatic process

10. Which of the following is not a path function

A. Heat
B. Work
C. Vdp
D. Thermal conductivity

THEORY OF MACHINES OBJECTIVE QUESTIONS

THEORY OF MACHINES OBJECTIVE QUESTIONS



1. PISTON RECIPROCATING INSIDE A CYLINDER IS AN EXAMPLE OF

A. COMPLETELY CONSTRAINED MOTION

B. SUCCESSFULLY CONSTRAINED MOTION

C. INCOMPLETELY CONSTAINED MOTION

D. PARTIALLY CONSTRAINED MOTION



2. I.C. ENGINE VALVES IS AN EXAMPLE OF

A. INCOMPLETELY CONSTAINED MOTION

B. COMPLETELY CONSTRAINED MOTION

C. SUCCESSFULLY CONSTRAINED MOTION

D. PARTIALLY CONSTRAINED MOTION



3. THE MINIMUM NO OF LINKS TO SATISFY THE CONDITION OF A FRAME IS

A. 3

B. 2

C. 4

D. 5



4. HART’S MECHANISM IS MADE UP OF ONLY

A. TURNING PAIRS

B. SLIDING PAIRS

C. ROLLING PAIRS

D. SPHERICAL PAIRS



5. THE PROFILE OF A GEAR IS SPECIFIED BY

A. BASE CIRCLE DIAMETER

B. ADDENDUM CIRCLE

C. PITCH CIRCLE DIAMETER

D. DEDENDUM



6. IMPACT STRESSED ARE DEVELOPED IN WHICH TYPE OF GEARS?

A. HELICAL GEARS

B. SPUR GEARS

C. HERRINGBONE GEARS

D. BEVEL GEARS



7. HARTNELL GOVERNOR IS WHICH TYPE OF GOVERNOR

A. DEAD WEIGHT

B. SPRING LOADED

C. STABLE

D. NONE OF THE ABOVE



8. FOR ISOCHRONOUS GOVERNORS

A. SPEED REMAINS CONSTANT IRRESPECTIVE OF RADIUS OF ROTATION OF BALLS

B. SPEED INCREASES WITH RADIUS OF ROTATION OF BALLS

C. SPEED DECREASES WITH INCREASE IN RADIUS OF ROTATION OF BALLS

D. SPEED FIRST INCREASES THEN DECREASES



9. A CAM WITH A KNIFE EDGE FOLLOWER IS WHICH TYPE OF PAIR

A. HIGHER PAIR

B. LOWER PAIR

C. SLIDING PAIR

D. ROLLING PAIR



10. WHICH OF THE GOVERNOR CAN BE ISOCHRONOUS?

A. WATT GOVERNOR

B. PORTER GOVERNOR

C. PROELL GOVERNOR

D. HARTNELL GOVERNOR

REFRIGERATION OBJECTIVE QUESTIONS

REFRIGERATION OBJECTIVE QUESTIONS



1. ONE TON OF REFRIGERATION EQUALS TO

A. 2.5 KW

B. 1.5 KW

C. 3.5 KW

D. 4.5 KW



2. VAPOUR COMPRESSION  CYCLE IS SOMEWHAT LIKE

A. CARNOT CYCLE

B. RANKINE CYCLE

C. REVERSED CARNOT CYCLE

D. REVERSED RANKINE CYCLE



3. WHICH OF THE FOLLOWING USES AIR AS REFRIGERANT

A. ERICSSON

B. STIRLING

C. CARNOT

D. BELL COLEMAN



4. AMMONIA ABSORBPTION REFRIGERATION CYCLE REQUIRES

A. VERY LITTLE WORK INPUT

B. MAXIMUM WORK INPUT

C. ZERO WORK INPUT

D. NEARLY SAME AS IN VAPOUR COMPRESSION  CYCLE



5. IN VAPOUR REFRIGERATION CYCLE THE CONDITION OF THE REFRIGERANT IS SATURATED LIQUID

A. AFTER PASSSING THROUGH THE CONDENSER

B. AFTER PASSING THROUGH EVAPORATOR

C. AFTER PASSING THROUGH EXPANSION THROTTLING VALVE

D. BEFORE ENTERING EXPANSION VALVE



6. IN VAPOUR COMPRESSION CYCLE THE CONDITION OF THE REFRIGERANT IS VERY WET VAPOUR

A. AFTER PASSING THROUGH COMPRESSOR

B. AFTER PASSING THROUGH EXPANSION THROTTLING VALVE

C. AFTER PASSING THROUGH CONDENSER

D. BEFORE ENTERING COMPRESSOR



7. THE BOILING POINT OF AMMONIA IS

A. -1000 C

B. -500 C

C. -33.30 C

D. 00 C



8. THE VAPOUR COMPRESSION REFRIGERATOR EMPLOYS THE FOLLOWING CYCLE

A. RANKINE

B. CARNOT

C. BRAYTON

D. REVERSED CARNOT



9. THE MOISTURE OF A REFRIGERANT IS REMOVED BY

A. EVAPORATOR

B. DEHIMIDIFIER

C. EXPANSION SAFETY VALVE

D. DRIERS



10. THE REFRIGERANT FOR A REFRIGERATOR SHOULD HAVE

A. HIGH SENSIBLE HEAT

B. HIGH LATENT HEAT

C. HIGH TOTAL HEAT

D. LOW SENSIBLE HEAT

SSC JUNIOR ENGINEER NOTIFICATION

Dear students

SSC has released notification for junior engineer.
Total post = 1000

Pay scale : 19300-34800 plus grade pay 4200.

It means your salary in hand will be around 38-40k per month.

So work hard.
Best of luck.

Information for today

Hello students

Sorry for today. I was not able to upload questions due to my busy schedule. But tomorrow I will upload for both refrigeration and theory of machines.

Gud nyt.

I.C. ENGINE OBJECTIVE QUESTIONS

I.C. Engine Objective Questions

1. In a four stroke engine the working cycle is completed in

A. One revolution of crankshaft
B. Two revolutions of crankshaft
C. Three revolution of crankshaft
d. Four revolutions of crankshaft

2. A two stroke cycle engine gives ..........the no of power strokes as compared to four stroke cycle engine at the same engine speed.

A. Half
B. Same
C. Double
D. Four times

3. In a four stroke cycle engine the sequence of operations is

A. Suction compression expansion exhaust
B. Suction expansion compression exhaust
C. Expansion compression suction exhaust
D. Compression expansion suction exhaust

4. In a four stroke cycle petrol engine the pressure inside the engine cyxlinder during the suction stroke is ..............the atmospheric pressure.

A. Above
B. Below
C. Equal
D. None

5. The theoretically correct mixture of air and petrol is

A. 10:1
B. 15:1
C. 20:1
D. 25:1

6. Stoichiometric ratio is

A. Chemically correct air fuel ratio by weight
B. Chemically correct air fuel ratio by volume
C. Actual air fuel ratio for maximum efficiency
D. None

7. During idling a petrol engine requires which type of mixture?

A. Lean
B. Rich
C. Chemically correct
D. Chemically incorrect

8. In a petrol engine the fuel supplied to the engine cylinder is mixed with required quantity of air and the mixture is ignited with a

A. Fuel pump
B. Fuel injector
C. Spark plug
D. None of these

9. In a petrol engine if diesel is used then the engine will

A. Not run
B. Run more efficiently
C. Run at high speed
D. Explode

10. A diesel engine has

A. One valve
B. Two valve
C. Three valves
D. Four valves

METAL CUTTING OBJECTIVE QUESTIONS

Production Engineering Objective Questions

1. Which of the following is a singlr point cutting tool?

A. Drill
B. Hacksaw
C. Milling cutter
D. Form tool

2. The angle between the tool face amd the ground end surface of flank is known as

A. Lip angle
B. Rake angke
C. Clearance angle
D. Nose angle

3. The angle between the face of the tool and the plane parallel to the base of the cutting tool is

A. Cutting angle
B. Rake angle
C. Clearance angle
D. End relief angle

4. The recommended value of rake angle (degrees) for machining of aluminium with cemented carbides is

A. 10
B. 15
C. 5
D. 25

5.  Tool signature comprise

A. 4 elememts
B. 6 elements
C. 7 elements
D. 8 elements

6.  In metal cutting at speed above 20 mpm maximum heat is carried by

A. Work
B. Tool
C. Chip
D. Equally by all of the above

7.  The hardest manufactued cutting tool material is

A. Diamond
B. High speed steel
C. Ceramics
D. Cemented carbides

8.  The type of chip produced while cutting ductile material is

A. Continuous
B. Discontinuous
C. With built up edge
D. Any one of the above depending on other factors

9.  Drilling is an example of

A. Simple cutting
B. Uniform cutting
C. Orthogonal cutting
D. Intermittent cutting

10.  The rake angle of a cutting tool

A. Determines profile of the tool
B. Prevents rubbing
C. Decides type of cutting action
D. Controls chip fotmation

                                             

FLUID MECHANICS OBJECTIVE QUESTIONS

1.      FOR A STATIC FLUID SHEAR STRESS IS

A.      ZERO

B.      CONSTANT

C.      GREATER THAN 1

D.     LESS THAN 1

2.      THE QUANTITIES IN WHICH MASS IS PRESENT DIRECTLY OR INDIRECTLY ARE KNOWN AS

A.      PHYSICAL QUANTITIES

B.      DYNAMIC QUANTITIES

C.      KINEMATIC QUANTITIES

3.      THE RATIO OF SPECIFIC WEIGHT OF LIQUID TO THE SPECIFIC WEIGHT OF PURE WATER IS KNOWN AS

A.      DENSITY OF LIQUID

B.      SPECIFIC GRAVITY OF LIQUID

C.      COMPRESSIBILITY OF LIQUID

D.     SURFACE TENSION OF LIQUID

4.      THE SPECIFIC GRAVITY OF WATER IS TAKEN AS

A.      0

B.      1

C.      LESS THAN 0

D.     GREATER THAN 1

5.      THE FORCE PER UNIT LENGTH IS THE UNIT OF

A.      CAPILLARITY

B.      SURFACE TENSION

C.      VISCOSITY

D.     DENSITY

6.      THE PROPERTY OF A FLUID WHICH ENABLES IT TO RESIST TENSILE STRESS IS KNOWN AS

A.      CAPILLARITY

B.      SURFACE TENSION

C.      VISCOSITY

D.     SPECIFIC GRAVITY

7.      WHEN A TUBE OF SMALLER DIAMETER IS DIPPED IN WATER THE WATER RISES IN THE TUBE WITH AN UPWARD SURFACE OF WHICH NATURE

A.      CONCAVE

B.      CONVEX

C.      PLANE

D.     TRANSPARENT