Staff Selection Commission Combined Graduate Level Exam
Question : A man standing close to the platform at a railway station experiences a pulling force towards a fast-moving train because of _____________.
Option 1: gravitational force between the train and the man
Option 2: illusion of the man
Option 3: the centripetal force
Option 4: pressure difference due to fast-moving air between
Correct Answer: pressure difference due to fast-moving air between
Solution : The answer is the pressure difference due to fast-moving air between them.
Because of the pressure differential caused by fast-moving air between the train and the man, a man standing near the platform at a railway station feels
Question : Directions: In the following question, select the missing number from the given series. 67, 46, 24, 1, –23, ?
Option 1: –48
Option 2: –38
Option 3: –46
Option 4: –50
Correct Answer: –48
Solution : Given: 67, 46, 24, 1, –23, ?
Subtract consecutive natural numbers (starting from 21) from the previous term to get the next term. 67 – 21 = 46; 46 – 22 = 24; 24 – 23 = 1; 1 – 24 = –23; –23 –
Question : Which of the following determines the pitch of a sound?
Option 1: Amplitude
Option 2: Frequency
Option 3: Loudness
Option 4: Wavelength
Correct Answer: Frequency
Solution : The correct option is Frequency.
The frequency of a sound, which is the number of oscillations or cycles of a wave that take place in a unit of time, determines its pitch. The unit of measurement for frequency is Hertz (Hz), where one Hertz
Question : Directions: In the question, a part of the sentence is in bold. Below are given alternatives to the bold part at (1), (2), and (3) that may improve the sentence. Choose the correct alternative. In case no improvement is needed, your answer is (4).
I don’t understand why did you not call me last night.
(1) Why had you not call
(2) Why you did not call
(3) Why not did you call
(4) No Improvement
Option 1: (1)
Option 2: (2)
Option 3: (3)
Option 4: (4)
Correct Answer: (2)
Solution : The sentence can be improved using the second option.
The sentence is grammatically inaccurate. The subject should be used before the verb, as the word order is changed when the question is converted into a statement. In this case, the question word is "why", so
Question : Directions: A series is given with one term missing. Select the correct alternative from the given ones to complete the series. Employ, Oyster, Error, Ornate, Tennis, ?
Option 1: Neptune
Option 2: Nature
Option 3: Terminate
Option 4: Isomer
Correct Answer: Isomer
Solution : Given: employ, oyster, error, ornate, tennis,?
Here, the last two letters of a word are the first two letters of the next word in the series. employ→oyster→error→ornate→tennis So,
Question : Directions: In the following question, some parts of the sentence have errors, and some are correct. Find out which part of the sentence has an error. The number of that part is the answer. If a sentence is error-free, your answer is "No Error".
The suggestion given by him (1) / is as bad, if not worst (2) / than the one suggested by you. (3) / No Error (4)
Solution : The error lies in the second part of the sentence.
The word worst should be replaced with worse to maintain proper comparative form.
The worst is the superlative form, while worse is the comparative form, which makes the sentence grammatically accurate.
Therefore, the correct sentence
Question : A can do a piece of work in 10 days and B can do it in 12 days. They work together for 3 days. Then B leaves and A alone continues. 2 days after that C joins and the work is completed in 2 days more. In how many days can C do it, if he works alone?
Option 1: 30 days
Option 2: 50 days
Option 3: 40 days
Option 4: 60 days
Correct Answer: 40 days
Solution : A does work for 3 + 2 + 2 = 7 days Work done by A = $\frac{7}{10}$ B does work for 3 days. Work done by B = $\frac{3}{12}=\frac{1}{4}$ Total work completed by A and B = $\frac{7}{10} + \frac{1}{4}$ = $ \frac{14}{20}
Question : What is the average of all numbers between 8 and 74 which are divisible by 7?
Option 1: 40
Option 2: 41
Option 3: 42
Option 4: 43
Correct Answer: 42
Solution : The first number to be divisible by 7 in this range = 14 The last number to be divisible by 7 in this range = 70 This forms an arithmetic progression, So the average = $\frac{70+14}{2}$ = 42 [Using arithmetic mean = $\frac{\text{First term +
Question : Select the most appropriate ANTONYM of the given word.
Wax
Option 1: Polish
Option 2: Cane
Option 3: Wail
Option 4: Wane
Correct Answer: Wane
Solution : The correct choice is the fourth option.
Wax means to become larger or stronger whereas wane means to progressively become smaller.
The meanings of the other options are as follows:
Polish: It refers to the process of making something smooth and shiny.
Cane: It refers
Question : The average temperature for Monday, Tuesday, Wednesday and Thursday was $48^{\circ}$. The average temperature for Tuesday, Wednesday, Thursday and Friday was $52^{\circ}$. If the temperature on Monday was $42^{\circ}$, then the temperature on Friday was (in degrees):
Option 1: 58$^\circ$
Option 2: 56$^\circ$
Option 3: 52$^\circ$
Option 4: 50$^\circ$
Correct Answer: 58$^\circ$
Solution : Monday + Tuesday + Wednesday + Thursday = 4 x 48 = 192 Tuesday + Wednesday + Thursday + Friday = 4 x 52 = 208 $\therefore$ Monday = 42 Tuesday + Wednesday + Thursday = 192 – 42 = 150 $\therefore$ Friday = 208
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