Q.1
The maximum efficiency of a square threaded screw is
Q.2
In order to have a connecting rod equally strong in buckling about X-axis and Y-axis, the moment of inertia about X-axis should be __________ the moment of inertia about Y-axis.
Q.3
In a marine flange coupling, the thickness of flange is taken as
Q.4
In a full journal bearing, the angle of contact of the bearing with the journal is
Q.5
If a bearing is designated by the number 305, it means that the bearing is of
Q.6
When bevel gears connect two shafts whose axes intersect at an angle greater than a right angle and one of the bevel gears has a pitch angle of 90°, then they are known as
Q.7
The connecting rod bolts are tightened up so that tightening stress
Q.8
In a flat belt drive, if the slip between the driver and belt is 1 %, between the belt and follower is 3% and driver and follower pulley diameters are equal, then velocity ratio of the drive will be
Q.9
The static tooth load should be __________ the dynamic load.
Q.10
The wear load should be __________ the dynamic load.
Q.11
A flanged pipe joint will be a leak-proof joint, if the circumferential pitch of the bolts is (where d = Diameter of bolt hole)
Q.12
The diameter of the rivet hole is usually __________ the nominal diameter of the rivet.
Q.13
In designing a flange coupling, the pitch circle diameter of bolts is taken as (where d = Diameter of the shaft)
Q.14
In designing a sleeve coupling, length of the sleeve is taken as (where d = Diameter of the shaft)
Q.15
For a square key made of mild steel, the shear and crushing strength are related as
Q.16
The dynamic tooth load is due to
Q.17
In designing a sleeve coupling, outer diameter of the sleeve is taken as (where d = Diameter of the shaft)
Q.18
When the material of key and shaft is same, and the width of key is one-fourth of the diameter of shaft (d), then length of key will be
Q.19
The permissible stress in the fillet weld is 100 N/mm². The fillet weld has equal leg lengths of 15 mm each. The allowable shearing load on the weldment per cm length of the weld is
Q.20
A shaft is subjected to
Q.21
When the belt speed increases
Q.22
In a partial journal bearing, the angle of contact of the bearing with the journal is
Q.23
If a spring is cut down into two springs, the stiffness of cut springs will be
Q.24
In worm, gears, pitch lead angle is
Q.25
In helical bevel gearing, the axes of shafts are __________ and the teeth are curved.
Q.26
A spring is used to
Q.27
Which of the following property is essential for spring materials?
Q.28
In case of thick cylinders, the tangential stress across the thickness of cylinder is
Q.29
The ball bearings are, usually, made from
Q.30
When the pulley or other mating piece is required to slide along the shaft, a __________ sunk key is used.
Q.31
When carbon in the cast iron is principally in the form of graphite, the cast iron will be of
Q.32
Screws used for power transmission should have
Q.33
Yield point in fatigue loading as compared to static loading is
Q.34
The arms of the pulleys for flat belt drive have
Q.35
When a bolt is subjected to shock loading, the resilience of the bolt should be considered in order to prevent breakage at the
Q.36
In order to determine the stresses in a thin cylinder due to an internal pressure, it is assumed that
Q.37
A rivet is specified by
Q.38
A shaft coupling should
Q.39
Which is correct statement? Stress concentration in static loading is
Q.40
When two helical springs of equal lengths are arranged to form a cluster spring, then
Q.41
Resilience of a material is important, when it is subjected to
Q.42
In testing a material for endurance strength, it is subjected to
Q.43
If two springs are in parallel then their overall stiffness will be
Q.44
When two springs are in series (having stiffness K), the equivalent stiffness will be
Q.45
A thin spherical shell of internal diameter d is subjected to an internal pressure p. If σt is the tensile stress for the shell material, then thickness of shell is equal to
Q.46
The tension on the slack side of the belt is __________ the tension on the tight side of the belt.
Q.47
In order to remove internal stresses produced by hardening the steel, the process usually adopted is
Q.48
When the belt is transmitting maximum power, the belt speed should be
(Where, m = mass of belt per meter (kg/m) and Pmax = maximum permissible tension in belt (N))
Q.49
In order to have smooth operation, the minimum number of teeth on the smaller sprocket, for moderate speeds, should be
Q.50
Spring index is
0 h : 0 m : 1 s