Mechanical Engineering Quiz 38
1 / 50
The maximum stress due to stress concentration in a bar having circular transverse hole, as compared to its static stress without hole will be_________________?
2 / 50
Leakage past the piston rings and valve seats in I.C engines with increase in speed_______________?
3 / 50
The reason for supercharging in any engine is to________________?
4 / 50
Chilled cast iron has____________________?
5 / 50
The impact strength of a material is an index of its ___________________?
6 / 50
In queuing theory, the nature of the waiting situation can be studied and analysed mathematically if_________________?
7 / 50
Isothermal compression effeicency can be attained by running the compressor__________________?
8 / 50
The number of electrons in 1 cm3 of metal would be of the order of_______________?
9 / 50
For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then_________________?
10 / 50
If shearing stress in nut is half the tensile stress in a bolt, then nut length should be equal to___________________?
11 / 50
Which one of the following represents a group incentive plan ?
12 / 50
Choose the wrong statement ?
13 / 50
The moment on the pulley which produces rotation is called ___________________?
14 / 50
The bulk modulus of elasticity with increase in pressure__________________?
15 / 50
The crown of the fire box is made hemispherical in order to___________________?
16 / 50
Steam in water tube boiler as compared to fire tube boiler_________________?
17 / 50
The effective power of gas turbines is increased by adding the following in compressor__________________?
18 / 50
When a body floating in a liquid, is displaced slightly, it oscillates about _________________?
19 / 50
Which of the following has least value of conductivity_________________?
20 / 50
Which of the following pipe joints would be suitable for pipes carrying steam_____________?
21 / 50
The center of gravity of a triangle lies at the point of __________________?
22 / 50
Poise is the unit of________________?
23 / 50
In an experiment to determine dryness fraction of steam, the mass of water separated was 1.2 kg in 15 mts and the mass of steam passed out in same time was 4.8 kg. Dryness fraction is__________________?
24 / 50
If n = number of members andy = number of joints, then for a perfect frame, n =_________________?
25 / 50
Free cutting steels_____________________?
26 / 50
The shearing stresses in the inner face as compared to outer face of the wire in a heavy close coiled spring is_________________?
27 / 50
Relationship between the number of links (L) and number of pairs (P) is___________________?
28 / 50
Film coefficient is defined as Inside diameter of tube________________?
29 / 50
Reheating of steam under ideal conditions takes place at constant __________________?
30 / 50
The first unclear power plant in India is located at____________________?
31 / 50
For which of the following substances, the internal energy and enthalpy are the functions of temperature only____________________?
32 / 50
Which of the following laws is applicable for the behavior of a perfect gas__________________?
33 / 50
Fuel oil consumption guarantees for I C engine are usually based on__________________?
34 / 50
Phenomenon of choking in compressor means __________________?
35 / 50
Diesel engines have low specific fuel consumption compared to petrol engine. This statement is____________________?
36 / 50
All radiations in a black body are___________________?
37 / 50
The lenght of Cornish boiler is of the order of _________________?
38 / 50
Which of the following mechanisms produces mathematically an exact straight line motion____________________?
39 / 50
The probability distribution of activity times in PERT follows following distribution__________________?
40 / 50
The flow in which each liquid particle has a definite path and their paths do not cross each other is called__________________?
41 / 50
For a thermodynamic process to be reversible, the temperature difference between hot body and working substance should be___________________?
42 / 50
Freon group of refrigerants are___________________?
43 / 50
Which of the following cycles is not a reversible cycle_____________________?
44 / 50
Frederick W. Taylor introduced a system of working known as________________?
45 / 50
Calorie is a measure of
46 / 50
In refrigerators, the temperature difference between the evaporating refrigerant and the medium being cooled should be_________________?
47 / 50
Air refrigeration cycle is used in ____________________?
48 / 50
Isotopes of same elements have___________________?
49 / 50
The value of Poisson?s ratio for cast iron is_________________?
50 / 50
Short horizontal lines on pressure-enthalpy chart show__________________?
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