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Mock Aptitude and Technical Test - 30/07/2020

Total questions: 40

Worksheet time: 40mins

Name
Class
Date
1.

A steel wire AB is stretched between rigid supports (see figure). The initial prestress in the wire is 42 MPa when the temperature is 20°C. What is the stress in the wire when the temperature drops to 0°C? Assume, E = 200 GPa ; α = 14x10-6/oC

a)

78 MPa

b)

88 MPa

c)

98 MPa

d)

108 MPa

2.

A bar AB having length L, Young’s modulus E, and Area A, is fixed at end A (see figure). At the other end a small gap of dimension s exists between the end of the bar and a rigid surface. A load P acts on the bar at point C, which is two-thirds of the length from the fixed end, and it makes the bar to come in contact with the right side support. If the support reactions produced by the load P are to be equal in magnitude, what should be the size ‘s’ of the gap?

a)

PL/6EA

b)

PL/4EA

c)

PL/2EA

d)

PL/EA

3.

A seesaw weighing 10 kg/m of length is occupied by two children, each weighing 40 kg (see figure). The centerof gravity of each child is 2 metres from the fulcrum. The board is 3m long on either side of the fulcrum, 100mm wide, and 60mm thick. What is the maximum bending stress in the board?

a)

1x105 N/m2

b)

2x105 N/m2

c)

3x105 N/m2

d)

4x105 N/m2

4.

A work material is machined using a tool material at a speed of 60m/min. It was estimated that the value of n for the tool material was 1 and the tool life was found out to be 80 min. If the life is increased to 100 min, what will be the speed for the same tool material and work piece?

a)

60 m/min

b)

55 m/min

c)

48 m/min

d)

40 m/min

5.

A mechanical wearing action caused by hard particles in the work material gouging and removing small portions of the tool is called ______.

a)

Diffusion

b)

Abrasion

c)

Plastic deformation

d)

Adhesion

6.

Find out the time required to drill a through hole of diameter 20 mm having a feed rate of 200mm/min. The thickness of the work material is 30mm. (value of tan 31 =0.6)

a)

0.55 min

b)

1.54 min

c)

0.87 min

d)

0.18 min

7.

___________ is designed to reduce the pouring velocity of the liquid metal which enters into ___________ to minimize erosion

a)

Sprue, runner

b)

Pouring basin, sprue

c)

Pouring basin, runner

d)

Sprue, sprue base

8.

Which type of casting used in application of gas turbine blades and dentures?

a)

Centrifugal casting

b)

Investment casting

c)

Die casting

d)

Slush casting

9.

Volume of liquid material between two work pieces

a)

Weld bead

b)

Weld puddle

c)

Root gap

d)

Throat

10.

Which of the following is not a solid state process in welding?

a)

Explosive

b)

Ultrasonic

c)

Diffusion

d)

Thermit

11.

A Balloon containing an ideal gas is initially kept in an evacuated and insulated room. The balloon ruptures and the gas fills the entire room. Which one of the following statement is true at the end of the process?

a)

The internal energy of the gas decreases, but enthalpy remains constant

b)

The enthalpy of the gas decreases, but internal energy remains constant

c)

Both internal energy and enthalpy remains constant

d)

Both internal energy and enthalpy increases

12.

The slopes of constant volume process in T-s diagram is

a)

T/Cp

b)

T/Cv

c)

V/Cp

d)

V/Cv

13.

With increasing temperature of intake air, Otto cycle efficiency

a)

Decreases

b)

Increases

c)

Remains same

d)

Depends on other factors

14.

The natural variability of the process is measured by ____________

a)

Process mean

b)

Sample standard deviation

c)

Process standard deviation

d)

Sample mean

15.

Which machine is the better option

a)

Machine1: Cpk=0.33

b)

Machine2: Cpl=1.7 Cpu=0.66

c)

Machine3: Cpl=1.33 Cpu=1.67

d)

Machine4: Cpl=0.63 Cpu=1.67

16.

Find the mode of the following

8,14,6,78,15,8,49,6,8,6,4,8,17,4,8,12

a)

6

b)

8

c)

4

d)

78

17.

A chief cook of a restaurant chain wants to find the variance of the critical path in the process of sandwich making. The process consists of five activities. The predecessor- successor (P-S) relationships between the nodes and time estimates of the activities are given in the table.

Help him find the variance of the critical path (in sec rounded off to two decimal places)

a)

3.81

b)

2.00

c)

4.21

d)

4.50

18.

Assume that you are the manager of Brittania biscuits and you have a production target of 50,000 units per year. You need to select a location to start a new factory. The details of the location are given in the table.

The optimum location for the plant is

a)

Allahabad

b)

Simla

c)

Pune

d)

Coimbatore

19.

The processing times on a single machine for 3 jobs are given in the table. All the jobs are available at time t = 0.

The mean flow time (in min) as per shortest processing time sequence is_____.

a)

6

b)

13

c)

15

d)

12

20.

The average age of 3 people is 46 years. When another man joins the group, the average reduces to 42 years. Now, another woman with age 4 years more than the new man replaces one of the 1st three people. The average age of these 4 is then 40 years. What is the age of the replaced person?

a)

22

b)

42

c)

34

d)

40

21.

A train has a journey of 320 km to run. After going 1/5th of the distance, the engine breaks down and it can only run the remaining part of the journey at 3/4th of the original speed. If it arrives 2 hrs 40 min late, what is its original speed?

a)

24 km/h

b)

32 km/h

c)

48 km/h

d)

64 km/h

22.

A man reaches his office late by 5 min when he travels at the speed of 8 km/hr. However, when he increases his speed to 12 km/hr, he reaches 5 min early. What is the distance that he travels?

a)

4 km

b)

6 km

c)

10 km

d)

None of the above

23.

A publisher sells books to a retail dealer at Rs. 5 a copy but allows 25 copies to count as 24. If the retailer sells each of the 25 copies at Rs. 6, the profit percent made by him is :

a)

25%

b)

20%

c)

30%

d)

None of the above

24.

Two pipes can ll a tank in 24 and 18 minutes respectively and a waste pipe can empty the tank in some time. All three pipes working together can ll the tank in 12 minutes. How much time is taken by the waste pipe to empty the full tank?

a)

54

b)

72

c)

68

d)

56

25.

From the top of a tower 75m high, the angles of depression of the top and bottom of a pole standing on the same plane as the tower are observed to be 30° and 45° respectively. Find the height of the pole

a)

30.5 m

b)

35.9 m

c)

28.6 m

d)

31.7 m

26.

If 5 men can paint a room 50 m long, 6 m high and 13 m wide working 10 hours per day in 6 days, then how many days of 9 hours each will 10 men need

m wide. (Assume all the walls and ceiling are painted leaving the floor)

a)

3 days

b)

4 days

c)

2.78 days

d)

2.6 days

27.

Pointing to a lady on the platform Geetha said, “She is the sister of the father of my mother’s son”. What is the lady to Geetha?

a)

Mother

b)

Sister

c)

Aunt

d)

Niece

28.

On what date of July, 1776 did Sunday fall?

a)

8th

b)

7th

c)

12th

d)

13th

29.

If BOMBAY is written as MYMYMY, how will TAMIL NADU be written in that code?

a)

TLATLATLA

b)

MNUMNUMNU

c)

IATIATIAT

d)

ALDALDALD

30.

How many children are there in the class ?


(A) Numbers of boys and girls are in the respective ratio of 3 : 4.

(B) Number of girls is more than the number of boys by 18

a)

if statement (A) alone is sufficient to solve the question, but statement (B) alone is not.

b)

if statement (B) alone is sufficient to solve the question, but statement (A) alone is not.

c)

if neither statement (A) nor statement (B) is individually sufficient to solve the question, but a combination of both is sufficient to solve the question.

d)

if neither statement (A) nor statement (B) is individually suf cient to solve the question, but a combination of both is sufficient to solve the question.

e)

if both the statements taken together are not sufficient and more information is required to solve the question.

31.

Village A is 3 km south of village B. Village C is 4 km east of village B.How far and in which direction village C from village A?

a)

5 m, north west

b)

12 m, south east

c)

5 m, north east

d)

12 m ,north

32.

Direction: In the following sentence,the main statement is followed by four sentences each. Select a pair of sentences that relate logically to the given statement.

Unless boss is present employees don't work

(i) Boss is present

(ii) Boss is not present

(iii) Employee work

(iv) Employee don't work

a)

(i) and (iv)

b)

(ii) and (iv)

c)

(iv) and (i)

d)

None of these

33.

If * stands for 'addition', / stands for 'subtraction', + stands for 'multiplication', and - stands for 'division', then 20 * 8 / 8 - 4 + 2 = ?

a)

12

b)

24

c)

28

d)

30

34.

Choose the option that most logically completes the idea as stated in each paragraph.


Millions of people suffer from diabetes and a good many of them don't even realize they have it. But this is no ordinary disease: It's an epidemic that breeds others. Blood sugar rampant - the hallmark of diabetes - damages vital organs. And it's getting worse. In the last ten years, the prevalence has increase sharply among younger people. Diabetes cases have exploded for one key reason: the increase in obesity over the past decade.

a)

Physicians believe that as diabetes is a life style disease, poor people are less affected by it than rich people who hardly put in any physical activity.

b)

Recent studies have shown that moderate weight loss and exercise can decrease the development of the most common form of diabetes by more than half in people at risk.

c)

The possible indicator of obesity is the increasing sugar levels of the younger generation that is addicted to fast food fads and imbalances in living styles.

d)

Research shows that the ill effects of obesity caused by diabetes can be controlled if youngsters are counselled for prevention of obesity by checking the intake of sugar in diets.

35.

Select most suitable synonym


saturnine

a)

asinine

b)

sombre

c)

imbecilic

d)

ribald

36.

Select the most suitable synonym


flippant

a)

silly

b)

audacious

c)

revengeful

d)

frivolous

37.

Identify the one which is opposite in meaning (antonym) to the question word and mark.


profligate

a)

reckless

b)

cautious

c)

careless

d)

haughty

38.

Pick out the word which is opposite in meaning to the given word.


SACROSANCT

a)

irreligious

b)

unethical

c)

irreverent

d)

unholy

39.

Select the word from the given options that can t the blanks in all the sentences given in the questions.


A. My nose is choked, I need to ...... it.

B. He lifts weight after work to ...... off steam.

C. My father will ...... his top when he sees what happened to the car.

D. Her death at twenty came as a ...... to her parents.

a)

blow

b)

feed

c)

rough

d)

smash

40.

Complete the following sentences with the right option


__________ learners learn best in hands-on learning settings in which they can physically manipulate something to learn.

a)

Parse

b)

Tactile

c)

Feeble

d)

Quick