# Q1: The tractive force in a locomotive with two cylinders is given by (where c = Fraction of reciprocating parts per cylinder, m = Mass of reciprocating parts, ω = Angular speed of crank, r = Radius of crank, and θ = Angle of inclination of crank to the line of stroke)

A m2.r cos θ
B c.m2.r sin θ
C (1 - c)m2.r(cos θ - sin θ)
D m2.r(cos θ - sin θ)

A dedendum
C clearance
D working depth

A Yes
B No

A open pair
B kinematic pair

# Q5: The Whitworth quick return motion mechanism is formed in a slider crank chain when the

C slider is a fixed link

A equal to one
B equal to 2
C less than 2
D greater than 2

# Q7: The partial balancing of reciprocating parts in locomotives produces

A hammer blow
B swaying couple
C variation in tractive force along the line of stroke
D all of the above

A Right
B Wrong

# Q9: For high speed engines, the cam follower should move with

A uniform velocity
B simple harmonic motion
C uniform acceleration and retardation
D cycloidal motion

A 2 mm
B 2.22 mm
C 2.50 mm
D 3.0 mm

A True
B False

A Yes
B No

A zero
B one
C π/2
D π

A Right
B Wrong

# Q15: In order to give the primary balance of the reciprocating parts of a multi-cylinder in-line engines,

A the algebraic sum of the primary forces must be equal to zero
B the algebraic sum of the couples about any point in the plane of the primary forces must be equal to zero
C both (a) and (b)
D none of these

A more than
B less than
C same as

A pitch circle
B base circle
C pitch curve
D prime circle

# Q18: When the two elements of a pair have a surface contact when relative motion takes place and the surface of one element slides over the surface of the other, the pair formed is known as a

A lower pair
B higher pair
C self-closed pair
D force-closed pair

# Q19: The gear train usually employed in clocks is a

A simple gear train
B reverted gear train
C sun and planet gear
D differential gear

# Q20: The pair is known as a higher pair, when the relative motion between the elements of a pair is

A turning only
B sliding only
C rolling only
D partly turning and partly sliding

# Q21: The dynamic friction is the friction experienced by a body, when the body

A is in motion
B is at rest
C just begins to slide over the surface of the other body
D none of the above

A Agree
B Disagree

# Q23: The static friction

A bears a constant ratio to the normal reaction between the two surfaces
B is independent of the area of contact, between the two surfaces
C always acts in a direction, opposite to that in which the body tends to move
D all of the above

A minimum
B zero
C maximum
D none of these

A ω12.r
B ( ω1 - ω2)r
C ( ω1 + ω2)r
D ( ω1 - ω2)2r

# Q26: In a screw jack, the effort required to lower the load W is given by

A P = W tan(α - φ)
B P = W tan(α + φ)
C P = W tan(φ - α)
D P = W cos(α + φ)

A 30° V-engine
B 60° V-engine
C 120° V-engine
D 150° V-engine

# Q28: In under damped vibrating system, the amplitude of vibration

A decreases linearly with time
B increases linearly with time
C decreases exponentially with time
D increases exponentially with time

A 90° and 180°
B 45° and 225°
C 180° and 270°
D 270° and 360°

A 1.4 N-s/m
B 18.52 N-s/m
C 52.92 N-s/m
D 529.2 N-s/m

# Q31: The cam follower generally used in automobile engines is

A knife edge follower
B fiat faced follower
C spherical faced follower
D roller follower

A stable
B unstable
C isochronous
D none of these

A 0° and 90°
B 0° and 180°
C 90° and 180°
D 180° and 360°

# Q34: The steering of a ship means

A movement of a complete ship up and down in vertical plane about transverse axis
B turning of a complete ship in a curve towards right or left, while it moves forward
C rolling of a complete ship side-ways
D none of the above

# Q35: In a circular arc cam with roller follower, the acceleration in any position of the lift will depend only upon

A total lift, total angle of lift, minimum radius of cam and cam speed
B radius of circular arc, cam speed, location of centre of circular arc and roller diameter
C mass of cam follower linkage, spring stiffness and cam speed
D total lift, centre of gravity of the cam and cam speed

A True
B False

A Right
B Wrong

A Right
B Wrong

A Right
B Wrong

A
B 90°
C 180°
D 360°

# Q41: In railway axle boxes, the bearing used is

A deep groove ball bearing
B double row self-aligning ball bearing
C double row spherical roller bearing
D cylindrical roller bearing

A
B
C
D

A 0.5
B 1
C 1.5
D 2

# Q44: The factor which affects the critical speed of a shaft is

A diameter of disc
B span of shaft
C eccentricity
D all of these

A sliding pair
B rolling pair
C lower pair
D higher pair

A 1 - 3 m/s
B 3 - 15 m/s
C 15 - 30 m/s
D 30 - 50 m/s

# Q47: In order to balance the reciprocating masses,

A primary forces and couples must be balanced
B secondary forces and couples must be balanced
C both (a) and (b)
D none of these

A 0.2
B 0.4
C 0.6
D 0.8

A m1r2 = m2r1
B m1r1 = m2r2
C m1m2 = r1r2
D none of these

# Q50: In a coupling rod of a locomotive, each of the four pairs is a __________ pair.

A sliding
B turning
C rolling
D screw

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