It is currently 25 Jun 2017, 12:17

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Art historians are using a process known as infrared

Author Message
TAGS:

### Hide Tags

VP
Joined: 13 Jun 2004
Posts: 1115
Location: London, UK
Schools: Tuck'08
Art historians are using a process known as infrared [#permalink]

### Show Tags

15 Mar 2005, 19:51
1
This post was
BOOKMARKED
00:00

Difficulty:

(N/A)

Question Stats:

100% (02:27) correct 0% (00:00) wrong based on 7 sessions

### HideShow timer Statistics

Art historians are using a process known as infrared scanning in analyzing the Mona Lisa to determine if it has been altered since completion and if Leonardo da Vinci first sketched the figure in black, as done by many artists of the time.

(A) if it has been altered since completion and if Leonardo da Vinci first sketched the figure in black, as done
(B) if it had been altered since completion and if Leonardo da Vinci first sketched the figure in black, a practice employed
(C) whether it has been altered since completion and whether Leonardo da Vinci first sketched the figure in black, a practice employed
(D) whether it was altered since completion and whether Leonardo da Vinci first sketched the figure in black, as was done
(E) whether it had been altered since completion and whether Leonardo da Vinci first sketched the figure in black, a practice done
VP
Joined: 25 Nov 2004
Posts: 1483
Re: SC - Mona Lisa [#permalink]

### Show Tags

15 Mar 2005, 20:19
(C) whether it has been altered since completion and whether Leonardo da Vinci first sketched the figure in black, a practice employed
GMAT Club Legend
Joined: 07 Jul 2004
Posts: 5043
Location: Singapore

### Show Tags

15 Mar 2005, 22:00
Art historians are using a process known as infrared scanning in analyzing the Mona Lisa to determine
if it has been altered since completion and if Leonardo da Vinci first sketched the figure in black, as done by many artists of the time.

'whether' is preferred over 'if' on the gmat. If should only be used when comparing similarities between objects.
So we can take out A and B.

(C) whether it has been altered since completion and whether Leonardo da Vinci first sketched the figure in black, a practice employed
- present perfect suggests alteration is still done today

(D) whether it was altered since completion and whether Leonardo da Vinci first sketched the figure in black, as was done
- I like D. past tense 'altered' and it comes later after the painting was completed (since completion). And you need a passive 'was done' for the last phrase 'by many artists of the time)

(E) whether it had been altered since completion and whether Leonardo da Vinci first sketched the figure in black, a practice done
- past perfect suggests alteration was done before completion of painitng. Not logical.

D it is.
GMAT Club Legend
Joined: 07 Jul 2004
Posts: 5043
Location: Singapore

### Show Tags

15 Mar 2005, 22:16
C is out. You can't employ a practice. and there is a passive construct at the end of the passage - 'by many artists...". You will therefore need 'was +past participle ' preceding it.

E.g. The rocket launched was watched by many people throughout the world.

Last edited by ywilfred on 15 Mar 2005, 22:17, edited 1 time in total.
Intern
Joined: 15 Mar 2005
Posts: 14

### Show Tags

15 Mar 2005, 22:17
This is very tricky ...when to use "simple past tense" (was) versus past perfect ("had been")....

I read somewhere if two events both happened in past, we need to use "had been" else use was for completed events... Can someone explain the difference when to select had been and 'was'.?
GMAT Club Legend
Joined: 07 Jul 2004
Posts: 5043
Location: Singapore

### Show Tags

15 Mar 2005, 22:19
mowghli wrote:
This is very tricky ...when to use "simple past tense" (was) versus past perfect ("had been")....

I read somewhere if two events both happened in past, we need to use "had been" else use was for completed events... Can someone explain the difference when to select had been and 'was'.?

you can't use the past perfect here because the past perfect construction defies logic.

It says " whether it had been altered since completion "

You can't alter something that has not been completed.
Manager
Joined: 13 Oct 2004
Posts: 236

### Show Tags

15 Mar 2005, 22:42
ywilfred wrote:
C is out. You can't employ a practice. and there is a passive construct at the end of the passage - 'by many artists...". You will therefore need 'was +past participle ' preceding it.

E.g. The rocket launched was watched by many people throughout the world.

The example that you have cited is not similar to the question that we are discussing.

Also, the non underlined portion of the sentence is using present continuous tense and the underlined portion has 'since' and is refering to an action that is possible in the present, so 'has' is just fine. Further, practice can certainly be employed and you cant use 'was' with since. So, C.
VP
Joined: 26 Apr 2004
Posts: 1209
Location: Taiwan
Re: SC - Mona Lisa [#permalink]

### Show Tags

16 Mar 2005, 00:37
Antmavel wrote:
Art historians are using a process known as infrared scanning in analyzing the Mona Lisa to determine if it has been altered since completion and if Leonardo da Vinci first sketched the figure in black, as done by many artists of the time.

(A) if it has been altered since completion and if Leonardo da Vinci first sketched the figure in black, as done
(B) if it had been altered since completion and if Leonardo da Vinci first sketched the figure in black, a practice employed
(C) whether it has been altered since completion and whether Leonardo da Vinci first sketched the figure in black, a practice employed
(D) whether it was altered since completion and whether Leonardo da Vinci first sketched the figure in black, as was done
(E) whether it had been altered since completion and whether Leonardo da Vinci first sketched the figure in black, a practice done

C.

'if' is wrong. A,B out
C is out, because 'since' needs perfect tense.

E is out because of past perfect tense. 'had' implys 'alter' happens before 'first sketch'
VP
Joined: 13 Jun 2004
Posts: 1115
Location: London, UK
Schools: Tuck'08

### Show Tags

16 Mar 2005, 03:22
OA is C

'IF' or 'Whether'. Since 'IF' is not followed by a 'THEN' clause, 'Whether' is right. This means A and B are out.
Looking at D, we have 'whether it was done......, as was done' . 'as was done' surely is awkward. So D is out.
Between C and E..., E has 'a practice done' and C has 'a practice employed'. 'A Practice employed' seems right. C also has 'has been' - which is right. 'had been' and 'a practice done' together does'nt keep the tenses intact.
GMAT Club Legend
Joined: 07 Jul 2004
Posts: 5043
Location: Singapore

### Show Tags

16 Mar 2005, 04:26
MA wrote:
ywilfred wrote:
C is out. You can't employ a practice. and there is a passive construct at the end of the passage - 'by many artists...". You will therefore need 'was +past participle ' preceding it.
E.g. The rocket launched was watched by many people throughout the world.

you need has been with since.

Point noted. I was thinking too much again..
Director
Joined: 21 Sep 2004
Posts: 607

### Show Tags

16 Mar 2005, 09:09
whethere is always preferred. A and B are gone.. C is good..
SVP
Joined: 03 Jan 2005
Posts: 2233
Re: SC - Mona Lisa [#permalink]

### Show Tags

16 Mar 2005, 10:52
A and B can be eliminated for the use of "if".
D wrongly used past tense (need present perfect. Note the present tense in the main clause and the word "since").
E wrongly used past perfect tense.
GMAT Club Legend
Joined: 01 Oct 2013
Posts: 10155
Re: Art historians are using a process known as infrared [#permalink]

### Show Tags

27 Dec 2014, 13:42
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
Re: Art historians are using a process known as infrared   [#permalink] 27 Dec 2014, 13:42
Similar topics Replies Last post
Similar
Topics:
By using a process called echolocation to analyze the echoes of the hi 2 14 Jun 2017, 19:31
7 QOTD #5 Using a new, high-technology process, diamonds can be created 7 29 Jun 2016, 02:42
1 It is well known that if the South had used 9 02 Feb 2016, 05:48
3 It is well known that if the South had used better military 12 24 Apr 2012, 16:01
30 Art historians are using a process known as infrared 47 28 Jun 2016, 19:43
Display posts from previous: Sort by