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S.No Question Option A Option B Option C Option D Answer Solution Comments Status Action
1 Thin shell of thickness ‘t’ and diameter d, is subjected to an internal pressure of p. Then the hoop stress induced is equal to pd/2t pd/4t pd/6t pd/t a Comments Active
2 Normally spring operates within elastic limits plastic limits elastic-plastic limits all of the above a Comments Active
3 In V belts the contract between the pulley and the belt is at the Bottom only Both side and bottom Top and bottom Sides only d The Lewis equation is applied only to the weaker of the two wheels (i.e. Pinion or gear). Comments Active
4 Lewis equation is applied only to the pinion only to the gear to stronger of the pinion or gear to weaker of the pinion or gear d Comments Active
5 The module of gear wheel of circular pitch 6 is \(Ï€\) 1/6 6 \(Ï€\) \(Ï€/6\) b Comments Active
6 The relation between two assembling ports is known as Limit Fit Allowance Tolerance b Fit is a relationship that exists between two mating parts, a hole, and a shaft, with respect to their dimensional difference before assembly. Comments Active
7 RMS method gives Tolerance Allowance Surface roughness Fit c Comments Active
8 The angle of Acme thread is 600 47.50 290 450 c Comments Active
9 The thread used for transmission of power is Square thread Buttress thread Acme thread British association thread a Buttress thread is used to transmit power in a single direction. It has advantages of both a square thread(Low friction resistance) and V thread (strength). Comments Active
10 The material used for coating the electrode is called flux slag deoxidizer binder a A flux coating is a layer of a chemical that acts as a cleaning agent, a purifying agent, or a flowing agent. It protects the weld pool and solid metal from atmospheric contamination and helps in removing impurities from the weld pool. Comments Active
11 In a flange coupling, the flange bolts are designed for fatigue shear force compression tensile force b Bolts are subjected to direct shear stress due to force and not torsional shear stress. Comments Active
12 Compressive strength of cast iron as compared to tensile strength is more less same none of the above a Comments Active
13 Identify the hardest metal Iron Platinum Tungsten Diamond d Comments Active
14 The volumetric strain is the ratio of the original volume of the change in volume change in volume to the original volume change in thickness to the original thickness change of volumetric strain b Whenever there is stress applied on an object from all the sides or some sides then there will be a change in its volume (dv) and if its original volume is V then according to the definition of strain volumetric strain = dv/v. Comments Active
15 If a simply supported beam is subjected to a uniformly distributed load, then the upper layer of the beam will be in tension compression both either a or b b Sagging Or Positive Bending Moment :
We take bending moment at a section as positive if Force tends to bend the beam at that considered point. This bending forms to curvature having concavity at the top.  Concavity at the top indicates compression in the top fibers of the beam.		 Comments Active
16 The point of contra flexure is a point where Shear force changes sign Bending moment changes sign Shear force is maximum Bending moment is maximum b Comments Active
17 Throttling operation occurs in Evaporator Expansion Valve Condenser Compressor b An expansion device is essentially a restriction offering resistance to flow so that the pressure drops, resulting in a throttling process. An expansion device in the refrigeration system normally serves two purposes. Comments Active
18 A refrigerant mostly used for reciprocating compressor is NH3 CO2 Freon-12 Freon-22 c Comments Active
19 Bell-Coleman cycle is applicable to Vapor compressor refrigeration Vapor absorption refrigeration Air refrigeration All of them c Bell Coleman cycle is also known as Reversed Brayton cycle or Reversed Joule cycle The working fluid of the Bell Coleman refrigeration cycle is Air. This system of refrigeration is used for Air Craft refrigeration and it has light weight. Comments Active
20 Ratio of refrigerating effect to the work supplied is called Coefficient Of Performance (COP) Energy Performance Ratio (EPR) Efficiency Relative COP a Comments Active
21 1 ton of refrigeration implies heat transfer at the rate of 210 kJ/min 210 kJ/sec 1000 kJ/hr. 2 kJ/hr. a Comments Active
22 The symbol o represents circularity cylindricity roundness concentricity d Comments Active
23 The pressure of liquid on a surface will always act ________ to the surface. parallel normal 450 600 b Comments Active
24 The point of application of the total pressure on the surface is called centroid of the surface center of pressure center of gravity center of area b Comments Active
25 One horse power is equal to 102 watts 75 watts 550 watts 735 watts d Comments Active
26 Ratio of shaft power to brake power is called mechanical efficiency hydraulic efficiency overall efficiency turbine efficiency a Comments Active
27 A Pelton wheel is an axial flow impulse turbine inward flow impulse turbine outward flow impulse turbine inward flow reaction turbine a Comments Active
28 The height of the chimney in a steam power plant is governed by control of pollution draught to be produced flue gases type of boiler b The height of the chimney in a steam plant is governed by Draught to be produced​. Draught It is a small pressure difference causing the flow of flue gas and air through the boilers. It is necessary for efficient combustion and to release the gases at sufficient height to avoid local pollution. Comments Active
29 The bending moment diagram for simply supported loaded in its center is a right angled triangle an isosceles triangle an equilateral triangle a rectangle b Comments Active
30 The bending moment at the end of a cantilever beam is zero minimum maximum average a Comments Active
31 A beam supported on more than two supports is called simply supported beam continuous beam fixed beam overhung beam b Comments Active
32 The energy stored in a body when strained within elastic limit is known as resilience proof resilience strain energy impact energy c Comments Active
33 The rivet of a riveted joint is subjected to tensile stress bending stress shear stress all of the above d Comments Active
34 PERT/CPM are analytical methods graphical methods inspection techniques network techniques d Comments Active
35 Founder of micro motion study is Taylor Fayal Gilbreth Mundel c This technique was developed by Fran Gilbreth who considered that an operation consists of minute elements which may be repetitive or non-repetitive. He termed these elements THERBLIG (after his name Gilbreth if spelt bank word is Therblig). Comments Active
36 Quality may be defined as fitness for purpose degree of preference and excellence conformance to specification all of them d It may be defined as fitness for purpose or conformance to requirements. It is the totality of features and characteristics of a product or service that bear on its ability to satisfy stated or implied needs. It is the degree to which a product or service satisfies the requirements of the user. Comments Active
37 Which one of the following is mounted between the engine and gearbox? propeller shaft differential clutch reduction gear c Comments Active
38 At 100% RH, the three characteristics DBT, WBT & DPT are Different Equal Any two are equal none of the above b When relative humidity of the air is 100%, i.e. the air is saturated, the dew point temperature (DPT) equals the wet bulb temperature (WBT), which is also equal to the dry bulb temperature. Comments Active
39 The flow through a nozzle is regarded as adiabatic flow constant volume flow isothermal flow constant pressure flow a Comments Active
40 Which one is S.I engine petrol diesel gas none of the above a Comments Active
41 What is the propulsive efficiency? it is the ratio of thrust power and propulsive power it is the ratio of thrust power and heat increased by combustion of fuel it is the ratio of propulsive work and heat released by combustion of fuel it is the ratio engine output and propulsive work a The propulsive efficiency is the fraction of total mechanical power output that is imparted to the working fluid and converted to the thrust power (as opposed to how much is wasted). Comments Active
42 Cetane number is the measure of viscosity of fuel ignition quality calorific value of fuel auto-ignition b The propulsive efficiency is the fraction of total mechanical power output that is imparted to the working fluid and converted to the thrust power (as opposed to how much is wasted). Comments Active
43 For minimum work in compressor operating between limits P1 and P3 the intercooler P2 is given by \(P_{2}=P_{1}+P_{3}\) \(P_{2}=P_{1}-P_{3}\) \(P_{2}=P_{1}P_{3}\) \(P_{2}=P_{1}+P_{3}\) c A higher cetane number resulting in quicker ignition of the fuel leads to less non-ignited fuels building up inside the combustion chamber, as well as more complete fuel combustion. Comments Active
44 For a material with poisons ratio 0.25, the ratio of modulus of rigidity to modulus of elasticity will 0.4 1.2 2.0 3.6 a Comments Active
45 The impact strength of a material is an index of its Toughness Tensile strength Fatigue strength Hardness a Impact strength is the capability of the material to withstand a suddenly applied load and is expressed in terms of energy. Often measured with the Izod impact strength test or Charpy impact test, both of which measure the impact energy required to fracture a sample. Thus, the impact strength of a material is an index of its toughness. Comments Active
46 Whenever a material is loaded within elastic limit, stress is _____strain. equal to directly proportional to inversely proportional to not equal b Comments Active
47 A 16N force produce a moment of 64 Nm. The moment arm is 2m M \(2\) 8m 4m d Moment = Force x moment arm
64 = 16 x a
A = 4m		 Comments Active
48 One kg force is equal to 1.02 N 8.9 N 9.8 N 12 N c Comments Active
49 The resultant of two forces P and Q acting at an angle is \(θ\) \(P^{2}+Q^{2}+2PQsinθ\) \(P^{2}+Q^{2}+2PQcosθ\) \(P^{2}+Q^{2}-2PQcosθ\) \(P^{2}+Q^{2}-2PQsinθ\) b Comments Active
50 In designing a shaft, hub and key for a system, weakest member taken is shaft hub key all are equally strong c Key is the weakest member in the assembly of shaft, pulley and key. Key acts as a safety device, whenever there is excess load appears on the pulley key fails first and it keeps safer to shaft and pulley. Comments Active
51 Keys are generally made of Mild steel High carbon steel C.I Wrought iron a Comments Active
52 In solid shaft, stress at the center is Maximum Minimum Zero Average c For the solid shaft, at the center, the stress is zero.
Stress is never zero in the hollow shaft although it is minimum at the inner surface of the shaft.		 Comments Active
53 When a shaft is subjected to combined twisting moment (T) and bending moment (M), the equivalent bending moment is equal to \(M^{2}+T^{2}\) \(M^{2}+4T^{2}\) \(4M^{2}+T^{2}\) \(\frac{1}{2}(M+M^{2}+T^{2} )\) d Comments Active
54 In a cam and follower mechanism, cam is a follower driver frame actuator b Comments Active
55 For same compression ratio thermal efficiency of Otto cycle is greater than that of diesel cycle thermal efficiency of Otto cycle is less than that of diesel cycle both a & b thermal efficiency of Otto cycle is equal to that of diesel cycle a Otto cycle has more area under the P-V diagram compared to the diesel cycle
 Comments Active
56 Efficiency of Carnot cycle is the function of absolute temperature range absolute pressure properties of air none of the above a Comments Active
57 In spur gears, the profile is surface of top of tooth curve forming face and flank part of tooth surface below pitch surface circular shape b In spur gear, the tooth profile starts from the base circle, covers the face and flank region and finally ends at top of the tooth Comments Active
58 Case hardening is done to get a soft ductile interior with a very hard surface done to get a hard ductile interior with a very hard surface followed by tempering none of the above a Case hardening is a method used to harden the outer surface of low-carbon steel while leaving the center or core soft and ductile. Case hardening involves heating the metal to its critical temperature in some carbonaceous material Comments Active
59 In 18/8 steel, what is the percentage of chromium? 18 8 1 0 a Comments Active