WorksheetsPre placement 3
Total questions: 58
Worksheet time: 29mins
Name
Class
Date
1.
A and B can complete a work in 12 days. B and C together can do it in 15 days. If A is twice as good a workman as C, find it what time B alone can do it.
a)
15 days
b)
20 days
c)
25 days
d)
60 days
2.
10 persons begin to work together on a job but after some days 4 persons leave. As a result, the job which could have been completed in 40 days is completed in 50 days. How many days after the commencement of the work did the 4 persons leave ?
a)
20 days
b)
18 days
c)
25 days
d)
30 days
3.
3 men and 4 women can earn 3780 rupees in 7 days. 11 men and 13 women can earn 15040 in 8 days. In what time will 7 men and 9 women earn 12400 ?
a)
8 days
b)
10 days
c)
12 days
d)
9 days
4.
A can complete a certain work in 4 minutes, B in 5 minutes, C in 6 minutes, D in 10 minutes and E in 12 minutes. The average number of units of work is completed by them per minute will be
a)
0.16
b)
0.40
c)
0.80
d)
None of these
5.
George takes 8 hours to copy a 50- page manuscript while sonia can copy the same manuscript in 6 hours. How many hours would it take them to copy a 100-page manuscript, if they work together
a)
48/7
b)
9
c)
68/7
d)
14
6.
P, Q, and R are three typists who working simultaneously can type 216 pages in 4 hours. In one hour, R can type as many pages more than Q as Q can type more than P. During a period of five hours, R can type as many pages as P can during seven hours. How many pages does each of them type per hour?
a)
14 ,17 ,20
b)
15, 18, 21
c)
15, 17, 22
d)
16, 18, 22
7.
Kamal can do a work in 15 days. Bimal is 50% efficient than Kamal. The number of days, Bimal will take to do same piece of work, is
a)
12
b)
14
c)
10
d)
16
8.
A sum of money is sufficient to pay A' s wages for 21 days and B' s wages for 28 days. The. Same money is sufficient to pay the wages for both for
a)
12 days
b)
14 days
c)
20 days
d)
49/2 days
9.
A man, a woman and a boy can complete a job in 3, 4 and 12 days respectively. How many boys must assist 1 man and 1 woman to complete the job ?
a)
1
b)
4
c)
19
d)
41
10.
A man and a boy together can do a certain amount of digging in 40 days. Their speeds in digging are in the ratio 8: 5 . How many days will the boy take to complete the work if engaged alone ?
a)
52 days
b)
68 days
c)
80 days
d)
104 days
11.
While covering a distance of 24 km, a man noticed that after walking for 1 hour and 40 minutes, the distance covered by him was 5/7 of the remaining distance. What was his speed in metres per second
a)
5/3
b)
2/3
c)
1/3
d)
2
12.
A is travelling at 72 km per hour on a high way while B is travelling at speed of 25 metres per second. What is the difference in their speeds in metres per second?
a)
2
b)
5
c)
3
d)
3/2
13.
The ratio of the speeds of a car, a train and a bus is 5:9:4. The average speed of the car, the bus and the train is 72 km/ hr. what is the average speed of the car and the train together
a)
78 km/ hr
b)
82 km/hr
c)
84km/hr
d)
None of these
14.
A is 10 miles west of B, C is 30 miles north of B, D is 20 miles east of C. What is the distance from A to D?
a)
10 miles
b)
30 miles
c)
30√2 miles
d)
10√10 miles
e)
10√13 miles
15.
An aeroplane files twice as fast as train which covers 60 miles in 80 minutes. What distance will aeroplane cover in 20 minutes?
a)
30 miles
b)
35 miles
c)
40 miles
d)
50 miles
16.
The speed of a car increases by 2 kms after every one hour. If the distance travelled in the first one hour was 35 kms, what was the total distance travelled in 12 hours ?
a)
456 km
b)
482 km
c)
552 km
d)
556 km
17.
A person travels from P to Q at a speed of 40 kmph and returns by increasing his speed by 50% . What is his average speed for Both the trips?
a)
36 kmph
b)
48 kmph
c)
45 kmph
d)
50 kmph
18.
A motorcyclist completes a certain journey in 5 hours. He covers one-third distance at 60 kmph and the rest at 90 kmph. The length of the journey is
a)
180 km
b)
240 km
c)
300 lm
d)
360 km
19.
Two boys A and B Start at same time to ride from Delhi to Meerut, 60 km away. A travels 4 km an hour slower than B, B reaches meerut and at once turns back meeting A, 12 km from meerut. A rate is ?
a)
4 Kmph
b)
8 kmph
c)
12 kmph
d)
16 kmph
20.
A car goes 20 metres in a second. Find its speed in km/ hr
a)
18
b)
72
c)
36
d)
20
21.
In a class of 60 students where girls are twice that of boys, Laxmi ranked 27th from the top. If there are 9 boys ahead of Laxmi, how many girls are after her rank ?
a)
22
b)
21
c)
23
d)
24
22.
The admission ticket for an exhibition bears a password which is changed after every clock hour based on set of words chosen for each day. The following is an illustration of the code and steps of rearrangement for subsequent clock hours. The time is 9 a.m. to 3 p.m.
Day's first password :
First Batch ----- 9 a.m. to 10 a.m.
is not ready cloth simple harmony burning
Second Batch ----- 10 a.m. to 11 a.m.
ready not is cloth burning harmony simple
Third Batch ----- 11 a.m. to 12 noon
cloth is not ready simple harmony burning
Fourth Batch ----- 12 noon to 1 p.m.
not is cloth ready burning harmony simple
Fifth Batch ----- 1 p.m. to 2 p.m.
ready cloth is not simple harmony burning and so on.
If the password for 11 a.m. to 12 noon was "soap shy miss pen yet the she", what was the password for the first batch ?
a)
shy miss pen soap yet the she
b)
pen miss shy soap she the yet
c)
miss shy soap pen she the yet
d)
soap pen miss shy she the yet
23.
Which of the following pairs represents the immediate neighbours of Q?
a)
P T
b)
P B
c)
P R
d)
P S
24.
In which of the following pairs,second person is to the immediate right of the first person
a)
H E
b)
B C
c)
B D
d)
D A
25.
Which of the following is definitely true?
a)
D is second to the left of H
b)
A is second to the right of E
c)
C is to the immediate right of B
d)
E is to the immediate left of C
26.
For a given gas the virial coefficients
a)
Depends on pressure
b)
Depends on temperature
c)
Depends on pressure and temperature
d)
Independent of temperature and pressure
27.
The acentric factor for simple fluids is equal to
a)
0
b)
1
c)
-1
d)
0.7
28.
For one mole of an ideal gas expanding isothemally to twice of its volume, the work obtained is equal to
a)
RT ln 2
b)
RT ln (1/2)
c)
RT
d)
2 RT
29.
Heat in the amount of 8 kJ is added to a closed system while it's internal energy decreases by 12 KJ . Workdone on the system is equal to
a)
20 KJ
b)
-20 KJ
c)
4 KJ
d)
-4 KJ
30.
The shape of T - S diagram in Carnot cycle is
a)
Rectangle
b)
Rhombus
c)
Trapezoid
d)
Circle
31.
A solid is transformed into vapour without going through the liquid phase
a)
Triple point
b)
Boiling point
c)
Below triple point
d)
Below boiling point
32.
Which of the following for a pure substance doesn't change during condensation
a)
Specific volume
b)
Specific enthalpy
c)
Specific internal energy
d)
Specific Gibbs energy
33.
The number of degrees of freedom for an azeotropic mixture of ethanol and water in vapour liquid equilibrium is
a)
3
b)
2
c)
1
d)
0
34.
The hydraulic mean diameter of the annular space between pipes of diameter 0.4 and 0.6m is
a)
0.1 m
b)
0.5 m
c)
0.4 m
d)
0.6 m
35.
A pitot tube indicates 5 cm of water when it is being used for measuring velocity of air. The velocity of air in m/s is
a)
5
b)
14.1
c)
56.22
d)
28.2
36.
A bed consists of particles of density 2000kg/m^3. If the height of the bed is 1.0m and it's porosity is 0.4 m the pressure drop required to fluidize the bed is
a)
25.61 kPa
b)
11.77 kPa
c)
14.86 kPa
d)
21.13 kPa
37.
Piston pump
a)
Can develop pressures more than 1500atm
b)
Contains check values at inlet and discharge
c)
Is an example of rotary pump
d)
Contains a chamber which moves from inlet to discharge and back to inlet
38.
A pipe is replaced by two parallel pipes, each with half of the cross section of the orginal pipe
a)
Remain the same
b)
Increas by more than 10%
c)
Decrease by more than 10%
d)
.change by less than 5%
39.
For lab flow of liquids through the pipes the ratio of maximum velocity and average velocity is more than 2 for
a)
Dilatent liquids
b)
Pseudoplastic liquids
c)
Newtonian liquids
d)
All the above
40.
Friction generated in unseparated boundary layers is called
a)
Skin friction
b)
Form friction
c)
None of these
41.
A pressure of 1 torr is equal to
a)
1 m H2O
b)
1 mm Hg
c)
1 N/m2
d)
1 kg/cm2
42.
A vaccum of 100 mm Hg is equivalent to an absolute pressure of
a)
100 mm Hg
b)
660 mm Hg
c)
860 mm Hg
d)
100/760 mm Hg
43.
Which of the following is not a unit of pressure
a)
Pascal
b)
Bar
c)
Torr
d)
Kg/m^2
44.
The volume occupied by 1 kmol of an ideal gas at 273.15 K and 101.325 kPa is
a)
22.414 m^3
b)
359 m^3
c)
22414 m^3
d)
35.9 m^3
45.
Pure in has phase enters a reactor, 50% of this A is converted to B through reaction A gives 3B . Mole fraction of A in the exit stream
a)
1/2
b)
1/3
c)
1/4
d)
1/5
46.
A solution of caustic soda in water contain 20% NaoH( by weight) at 60°C . The density of of the solution is 1.196kg/l.
Calculate Molarity, normality, molality of solution respectively are
a)
5.98, 5.98, 6.25
b)
2, 2, 2.5
c)
6.25, 6.25, 5.98
d)
2.5, 2.5, 2
47.
Air contains 79 mol% N2 and 21 mol% O2. It's average molecular weight is equal to
a)
28
b)
32
c)
28.84
d)
30
48.
Continuous measurement of oxygen content in the flue gases on wet basis is done by
a)
Orsat apparatus
b)
Zirconium oxide cell
c)
Fyrite apparatus
d)
All the above
49.
Caustic soda flakes afe found to contain 50 ppm silica . The silica impurity in wt % is equal to
a)
50
b)
0.005
c)
0.0005
d)
0.05
50.
In a binary mixture of A and B, the weight fraction of component A will be more than the mole fraction of component A if the ratio of the molecular weight of A to the molecular weight of B is
a)
Equal to 1
b)
More than
c)
Less than 1
d)
More than or equal to 1
51.
The molar composition of gas is 10% O2, 10%H2, 30%CO2 and balance H2O.
If 50% H2O condenses, the final mole percent of H2 in the gas on a dry basis will be
a)
10%
b)
5%
c)
18.18%
d)
20%
52.
Which of the following soild fuels have gross maximum calorific value?
a)
Coke
b)
Lignite
c)
Bagasse
d)
Rice husk
53.
A gaseous mixture contains methane and inert gas 20 ml of this mixture requires 16 ml of O2 for complete combustion. The percentage of methane in the mixture is equal to
a)
80
b)
60
c)
40
d)
20
54.
Liquid fuel is found to contain 87.1% carbon, 12.5% hydrogen and 0.4% sulphur
( by weight). It's gross calorific value at 25°C is determined to be 45071 kJ/kg fuel and the latent heat of vaporization of water at 25°C is 2442.5 kJ/kg. The net calorific value of the liquid fuel in kJ/kg at 25°C is equal to
a)
2043.8
b)
2084
c)
2395.56
d)
2355.4
55.
The compressibility factor of a gas obeying van der waals equation of state as it's critical temperature and critical pressure is
a)
1
b)
0
c)
8/3
d)
3/8
56.
Combustion requires
a)
A supply of oxygen
b)
A combustible fuel
c)
A source of heat energy
d)
All the above
57.
A Carnot engine operates between heat reservoirs at 750k and 300K and produces power of 95000 kW. The thermal efficiency of engine is
a)
0.6
b)
0.94
c)
0.68
d)
0.4
58.
Which of the following is a negative quantity for an ideal solution
a)
Volume change of mixing
b)
Enthalpy change of mixing
c)
Gibbs energy change of mixing
d)
Entropy change of mixing
100 %
