Q.1
A machine part subjected to _________ is called a strut.
Q.2
In levers, leverage is the ratio of
Q.3
Which of the following pipe joints would be suitable for pipes carrying steam?
Q.4
The connecting rod bolts are tightened up with initial tension greater than the external load so that
Q.5
The circumferential and longitudinal strains in a cylindrical boiler under internal steam pressure are εc and εl respectively. The change in volume of the boiler cylinder per unit volume will be
Q.6
A screw is said to be over hauling screw, if its efficiency is
Q.7
A screw is said to be a self locking screw, if its efficiency is
Q.8
The modulus of elasticity for mild steel is approximately equal to
Q.9
The included angle for the British standard whitworth thread is
Q.10
Two helical springs of the same material and of equal circular cross-section, length and number of turns, but having radii 80 mm and 40 mm, kept concentrically (smaller radius spring within the larger radius spring), are compressed between two parallel planes with a load W. The inner spring will carry a load equal to
Q.11
In V-belt drive, belt touches
Q.12
Oil in journal bearing should be applied at the point where load is
Q.13
The shock absorbing capacity of a bolt may be increased by
Q.14
The resilience of a bolt may be increased by
Q.15
When two non-intersecting and non-coplanar shafts are connected by gears, the arrangement is known as
Q.16
Shear stress theory is applicable for
Q.17
Maximum principal stress theory is applicable for
Q.18
When a metal or alloy is cold worked,
Q.19
The permissible stress for carbon steel under static loading is generally taken as
Q.20
The strength of the unriveted plate (P) per pitch length is equal to
Q.21
In the levers of __________ type, the mechanical advantage is less than one.
Q.22
Applications in which stresses are encountered in one direction only uses following type of threads
Q.23
The condition for maximum power transmission is that the maximum tension in the flat belt should be equal to
(Where, Pc = tension in belt due to centrifugal force)
Q.24
The surface finish factor for a mirror polished material is
Q.25
According to Indian standard specifications, 100 H6/g5 means that the
Q.26
Surface endurance limit of gear material is dependent upon its
Q.27
The railway carriage couplings have
Q.28
If a load W is applied instantaneously on a bar; Then the stress induced in bar will
Q.29
Gear box is used
Q.30
The centre distance between two meshing involute gears is equal to
Q.31
Plastic flow in ductile materials
Q.32
Which of the following screw thread is used for power transmission in one direction only?
Q.33
For circumferential joint in boilers, the type of joint used is
Q.34
When a close coiled helical spring is compressed, its wire is subjected to
Q.35
A column of length l is fixed at both ends. The equivalent length of the column is
Q.36
The coefficient of friction in belt drive depends upon
Q.37
The cracks in helical springs used in railway carriages usually start on the inner side of the coil because of the fact that
Q.38
Soderberg relation is based on __________ of the material whereas all other failure relation for dynamic loading are based on ultimate strength of the material.
Q.39
The expression 0.175 - 0.841/T is the Lewis form factor for
Q.40
In worm gears, the pressure angle is __________ the angle between two inclined faces in axial plane.
Q.41
The ultimate strength of steel in tension in comparison to shear is in the ratio of
Q.42
In order to withstand resistance to wear, the best profile of gear is
Q.43
In hydrostatic bearings
Q.44
In the levers of third type, the mechanical advantage is __________ one.
Q.45
The power transmitted by belt drive depends upon
Q.46
An open belt drive is used when
Q.47
When a closely coiled helical spring is subjected to a couple about its axis, the stress induced in the wire material of the spring is
Q.48
Cast iron pipes are mainly used
Q.49
A fast and loose pulley drive is used when
Q.50
A compound belt drive is used when
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